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1.CHEMICAL REACTIONS AND EQUATIONS
EXERCISE-11. Which of the following is a chemicalchange?
a) Rusting of Ironb) Burning of coalc) Digestion of foodd)All the above
2. Formula of lime stone is_______a) Ca(OH)
2
b) CaCO3
c) CaOd) Ca(NO
3)
2
3. The Substances that are present on theleft hand side of a chemical equation arecalled
a) Reactantsb) Productsc) Reagentsd) By products
4. When quick lime is added to water, whichof the following is formed
a) Lime stoneb) Lime waterc) Quick limed) Gypsum
5. Which of the following is the smallestparticle involved in a chemical reaction?
a) Elementb) Moleculec) Atomd) Ion
6.AFormula unit Indicatesa) One unit of atomb) One unit of moleculesc) One unit of iond)All the above
7. + The values of x, y, z are
a) x=1, y=1, z=1b) x=2, y=1, z=2c) x=2, y=2, z=2d) x=2, y=1, z=1
8. The chemical reaction in which energy isabsorbed to form a new compound is called
a) Exothermic reactionb) Endothermic reactionc) Redox reactiond) Balanced reaction
9. When iron nail dipped in CuSO4the nail
becomes brown due toa) Deposition of copper on ironb) Dissolution of ironc) Reduction of irond) Oxidation of Cu
10. The colour of PbO isa) Brownb) Redc) Blackd)Yellow
11. When dilute hydrochloric acid is added toiron fillinga) Hydrogen gas and Iron chloride are formedb) Chlorine gas and Iron hydroxide are formedc) No reaction takes placed) Iron salt and water are produced
12. The reaction of formation of hydrogenchloride from hydrogen and chlorine
represents following types of reaction.a) Decompositionb) Displacementc) combinationd) double – displacement
13. Why food materials are packed in air lightcontainers?
a) To preserve the nutrients
b) To prevent the spoilage by oxidationc) To prevent the spoilage by reductiond) To improve the taste
14. The process of addition of oxygen to asubstance is called
a) Reductionb) Oxidationc) Redox processd) Hydration
15. The process of oxidation involvesa)Addition of oxygenb) Removal of hydrogenc) Loss of electronsd)All the above
16. The reagent that undergoes oxidation inredox reaction is called
a) Oxidizing agentb) Reducing agentc) Redox reagentd) Dehydrating agent
17. CuO+H2
Cu+H2O. In this reaction
which of the following is oxidizeda) CuOb) H2c) Cud) H2O
18. Cut surfaces of fruits like pears, bananaetc., colour change due to action of
a) Oxidaseb) Reductasec) Tyrosinased) Polyphenol reductase
19. Which of the following method is used toprevent the corrosion in Iron?
a) Galvanisationb)Alloyingc) Paintingd)All the above
20. Why moist is act on bleaching agent?
a) In presence of water, gives nascenthydrogenb) In presence of water, gives nascent oxygenc) Moist imparts colour to the substanced) Moist chlorine liberates nascent chlorine
21. Rancidity means?a) Improve the quality of foodb) Improve the preservation of foodc) Spoilage of food by oxidationd)Any one of the above
22. Which of the following is not a type ofchemical reaction?
a) Combinationb) Decompositionc) Displacementd) Dissociation
23.Ca(OH)2+CO
2ö’Y+H
2O. The X and Yare
a) CaCO3, Ca(OH)
2
b) Ca(HCO3)
2, CaCO
3
c) CaCO3,Ca(HCO
3)
2
d) CaCO3, CaCO
3
24. A reaction in which single product isformed from two or more reactants is knownas
a) Combinationb) Decompositionc) Displacementd) Double displacement
25. The reaction in which one elementdisplaces another element
from its compound is calleda) Combinationb) Decompositionc) Displacementd) Double displacement
26. What is the volume ration of H2and O
2
produced by electrolysis of acidulated water?
a) 1:8b) 1:2c) 2:1d) 1:16
27.Avagadro number(NA) is
a) 6.625 X 10-27
b) 9.1 X 10-27
c) 6.022 X 1023
d) 6 X 1020
28. The number of molecules present in ofhydrogen
a) 6 X 1023
b) 3 X 1023
c) 1 X 1023
d) 2 X 1023
29. How many moles of H2O is required to get
one mole oxygen on electrolysis?a) 1b) 2c) 3d) 4
EXERCISE-21. Which of the following statement iswrong?a) Conversion of milk into curd is a chemicalchangeb) Addition of water to quick lime liberatesheat energyc)Addition of aqueous Na
2SO
4to aqueous
BaCl2
from clear solutiond) Calcium oxide produces colourlesssolution when dissolved in water
2. In which of the following reactions gas is notevolved?
a) Reaction between Zn and H2SO
4
b) Reaction between Ca(OH)2and CO
2
c) Decomposition of AgCl in presence ofsunlight
d) Photosynthesis
3. Which of the following is true about balancedequation?
a) It is balanced by trial and error methodb) It gives the ration of number of
molecules of reactants and productsc) Molar ratio of reactants and productsd)All the above
4. How many grams of Iron (Fe) is produced bytreating 27g of ‘Al’ which excess of Fe
2O
3?
a) 27b) 56c) 112d) 28
5. How many liters of O2
is formed by treatmentof 23 grams of ‘Na’ with excess of water?
a) 22.4lb) 11.2lc) 44.8ld) 5.6l
6. Which of the following is used to carried outdecomposition reactions?
a) Heatb) Lightc) Electricityd)Any one of the above
7. Heating of Phb(NO3)
2gives two gases ‘X’ and
‘Y’. The colour of X and Y isa) X = Colourless, Y = Colourlessb) X = Red, Y = Brownc) X = Brown, Y = Colourlessd) X = Green, Y = Yellow
8. Heating of which of the following compoundgives acidic and basic oxide
a) Pb(NO3)
2
b)AgClc) CaCO
3
d)All the above.
9. CuO + H2ö’Cu+H
2O. In this reaction
a) CuO is reducedb) H
2is oxidized
c) It is redox reactiond) All are correct.
10. Which of the following statement iswrong?a) Corrosion is a oxidative deterioration of ametalb) Rancidity is an oxidation reactionc) Bleaching action of moist chlorine is due tooxidationd) Vitamin C and E improve the spoilage offood
1.CHEMICAL REACTIONS AND EQUATIONS
EXERCISE-1 Keys
1 ). 4 2 ) 2 3 ). 1 4 ). 25 ). 3 6 ). 4 7 ). 2 8 ). 29 ). 1 10 ). 4 11 ). 1 12 ). 3
13 ). 2 14 ). 2 15 ). 4 16 ). 217 ). 2 18 ). 3 19 ). 4 20 ). 221 ) 3 22 ). 4 23 ). 4 24 ). 125 ). 3 26 ). 2 27 ). 3 28 ). 229 ). 2
EXERCISE-1I
1 ). 3 2 ). 2 3 ). 4 4 ). 25 ). 2 6 ). 4 7). 3 8 ). 39 ). 4 10 ). 4
2. ACIDS, BASES AND SALTS
EXERCISE-1
1. Which of the following is sour to taste andsoapy to touch?
a) CH3COOH
b) HClc) H
2SO
4
d) NH2OH
2. The Colour of the phenolphthalein indicatorin basic solution is
a)Yellowb) Greenc) Pinkd) Orange
3. Which of the following is not a character ofacids
a) Sour to tasteb) Turns blue litmus to redc) Soapy to touchd) Liberates H
2gas with metals
4. Which of the following is liberated whenacids reacts with acids
a) O2
b) H2
c) N2
d) Cl2
5. Formula of sulphuric acid isa) HClb) H
2SO
4
c) HNO3
d) CH3COOH
6. Which of the following gas is released whenNaOH is treated with Zn?
a) O2
b) ZnCl2
c) H2
d) N2
7. A Solution reacts with crushed egg shells togive a gas that turns lime water milky,
the solution containsa) NAClb) HClc) LiCld) KCl
8. Which of the following substances whenmixed together will produce table salta) Sodium thiosulphate and sulphur dioxideb) Hydrochloric acid and sodium hydroxidec) Chlorine and oxygend) Nitric acid and sodium hydrogen carbonates
9. Which of the following medicines is usedfor treating indigestion
a)Antibioticb)Analgesicc)Antacidd)Antiseptic
10. Which of the following is the mostaccurate way of showing neutralisationa)Acid + base ö’ Acid-base solutionb)Acid + base ö’ Salt + waterc) Acid + base ö’ Sodium chloride + Hydrogend)Acid + base ö’ Neutral Solution
11. Which of the following is not acidicoxide?
a) SO2
b) CO2
c) CaOd) O
2
12. Which of the following is the commonelement to all acids?
a) Oxygenb) Hydrogenc) Chlorined) Sulphur
13. Which of the following compounds turnsblue litmus to red
a)Acidb) Basec) Saltsd) a and b
14. The H+ ion aqueous solution exist asa) Hydroxy ionb) Hydronium ionc)Ammonium iond)All the above
15. Which of the following is slightly soluble inwater?
a) Be(OH)2
b) Ba(OH)2
c) NaOHd) KOH
16. Dry HCl is not turn blue litmus to red. Thisis due to
a) Dry HCl is a acidb) Dry HCl is not produced H+ ionsc) It is a gasd) It is pungent in odour
17. pH is introduced bya) Bohrb) Sorensenc) Millikend) Pauling
18. The nature of solution of pH between 0 to 7
a) Neutralb)Acidicc) Basicd) Acidic or basic
19. pH of solution isa) 0b) 7c) 14d) 1
20. The concentration of solution is 1 M. Thenthe pH is
a) 1b) 2c) 3d) 0
21. The pH of blood isa) 7b) 7-8c) 0d) 14
22. pH of rain water isa) 5b) <5.6c) 5.6d) >5.6
23. Which of the following acid undergocomplete ionisation?
a) CH3COOH
b) HCOOHc) CH
3CH
2COOH
d) H2SO
4
24. As the pH value increases from 7 to 14a) H+ ion concentration decreasesb) H
3O+ ion concentration decreases
c) OH- concentration increasesd)All the above
25. H+ ion is aqueous exist as hydronium ion(H
3O+). Each H+ ion is attached by how many
water molecules?a) 1b) 2-4c) 4-6d) 6-8
26. Which of the following compounds has pHgreater than 7 ?
a) Battery acidb) Lemon juicec) Baking sodad) Gastric fluid
27. Which of the following is not acidic?a) H
3PO
4
b) HNO3
c) HCld) C
2H
5OH
28. Which of the following is responsible foracidic properties of acids?
a) H+ ionsb) OH- ionsc) Both H+ or OH- ionsd) None
29. Which of the following compound is usedto dry the gases?
a) Calcium chlorideb) Calcium carbonatec) KOHd) NaOH
30. The pH of rain water is 5.6. This is due toa) Dissolution of N
2
b) Dissolution of O2
c) Dissolution of CO2
d)All the above
31. The Chemical present in tooth enamel isa) CaCO
3
b) Ca3(PO
4)
2
c) Ca(NO3)
2
d) CaSO4
32. The compounds present in tooth pastea)Acidsb) Basesc) Saltsd) None
33. Which of the following compoundsneutralize excess acid in stomach?
a)Anti bodiesb) Anti bioticsc)Antacidsd)Antiphyretics
34. Which of the following is present inAntacids?
a) Ca(OH)2
b) NaOHc) Mg(OH)
2
d) NH4OH
35. pH of salt of strong acid and weak base isa) 7b) less than 7c) more than 7d) 14
36. Sodium chloride (Common salt or tablesalt) is added to food to
a) Improves nutrientsb) Improves tastec) Improves digestiond) Improves quality of food
37. Which of the following compound isprepared by electrolysis of Brine solution?
a) NaOHb) Na
2CO
3
c) NaCld) CaSO
4
38. Which of the following gas is liberated atcathode and anode during electrolysis of Naclsolution (Brine solution)?
a) H2, O
2
b) O2, H
2
c) Cl2, O
2
d) NaOH, Cl2
39. Which of the following gas is used tomaking PVC?
a) H2
b) O2
c) Cl2
d) N2
40. Which of the following is not a use ofbleaching powder?a)As a bleaching agent in textile industryb)As a disinfectant for drinking waterc)As a oxidisding agentd)As a reducing agent
41. The formula of Bleaching powder isa) Ca(OH)
2
b) CaOCl2
c) Ca(HCO3)
2
d) CaSO4, 2H
2O
42. When NaHCO3is added to water, the gas
liberated isa) O
2
b) CO2
c) NOd) CO
43. Which of the following is not formed onheating of NaHCO
3
a) NaOHb) Na
2CO
3
c) CO2
d)All the above
44. Which of the following is used forsupporting fractured bones?
a) CaCO3
b) CaSO4. ½ H
2O
c) CaSO4. 2H
2O
d) CaCl2
45. Which of the following is used in glassmaking?
a) Na2CO
3
b) NaOHc) CaSO
4. ½ H
2O
d) CaOCl2
EXERCISE-2
1. HCl, H2SO
4, CH
3COOH are some acids.
Which of the following is not true for theabove acids?
a) All are produce H+ ions in waterb) All are turns blue litmus to redc) pH of the compounds is less than 7d) All are strong acids
2. Which of the following is correcta) Only synthetic indicators are used toidentify the nature of solutionb) Indicators are strong acids or strong basesc) Indicators are weak acids or weak basesd) Universal indicators gives the same colourat different pH values
3. When excess of HCl reacts with CaCO3
gives gas ‘X’. The excess ‘X’ is passedThrough Ca(OH)
2to form compound ‘Y’. Then
‘X’and ‘Y’are?a) CaCO
3, CO
2
b) CO2, CO
2
c) CO2, Ca(HCO
3)
2
d) Ca(HCO3)
2, CO
2
4. When metal carbonates are treated with acidcolourless gas is liberated. The aqueoussolution of this produces which of thefollowing colours with phenolphthalein?
a)Yellowb) Colourlessc) Pinkd) Red
5. What is the reaction of dry HCl gas onlitmus paper?
a) Turns blue litmus to redb) Turns red litmus to bluec) No change in colourd) None of the above
6. Which of the following changes on dilutionof solution?
a) Nature of the compoundb) Number of ionsc) Number of ions per unit volumed)All are changes
7. Which of the following indicator givesdifferent colours at different concentrations?
a) Methyl orangeb) Olfactory indicatorc) Natural indicatorsd) Universal Indicators
8. The pH of pure water is 7 but the pH of rainwater is less than 7. This is due toa) Rain water contains some saltsb) Gases like CO
2dissolved in water and
becomes basicc) Gases like CO
2dissolved in water and
becomes acidicd) Dust particles are dissolved and becomesacidic
9. Which of the following is not true about pH?
a) It indicates the concentration of H+ ions insolutions of less than 1 molar.b) At pH = 0, the hydronium ion concentrationin 1 molarc) At pH = 0, the hydroxide ion concentrationin 1 molard)All the above.
10. Quick lime or Calcium carbonates is addedto soil to
a) Improve the basic nature of soilb) Improve the nutrients in all soilc) Neutralise the acidic nature of soild) Kill the pests
11. CaCO3
X+CO2.
X + H2O Y..
X + Cl2
Z. Z is prepared by
a) Decomposition of NaHCO3
b) Decomposition of Ca(HCO3)
2
c) Reaction between CaO and H2O
d) Reaction between Ca(OH)2and Cl
2
12. Which of the following raw material is notused in the preparation of baking soda?
a) NaClb) CO
2
c) H2SO
4
d) NH3
13. NaHCO3+HCl NaCl+H
2O + X. The gas
‘X’ is passed through aqueous Na2CO3Solution to form compound ‘Y’. Then X
andYarea) X = Co
2, Y = Na
2CO
3
b) X = Co2, Y = NaHCO
3
c) X = H2, Y = NaHCO
3
d) X = Cl2, Y = NaOH
14. CaSO4
. 2 H2O CaSO
4. ½ H
2O X. X is
a) Dead burnt CaSO4
b) Plaster of Parisc) Gypsumd)All the above
15. Which of the following is wrong intermsof water of crystallization?
a) CuSO4. 5 H
2O
b) CaSO4. 2 H
2O
c) Na2CO
3. 5 H
2O
d) Na2CO
3. 10 H
2O
SELF TEST-11. Chemical equations are balanced accordingto which law?
a) Law of conversation of energyb) Law of conversation of massc) Law of conversation of momentumd)All the above
2. Which of the following is not a chemicalchange?
a) Digestion of foodb) Addition of water to quick limec) Rusting of irond) Melting of ice
3. Which of the following gas is liberated, when‘Zn’ is treated with dilute HCl?
a) O2
b) H2
c) CO2
d) N2
4. xC3H
8+ y O
2ö’ ZCO
2+ 4H
2O. Values of x,y
and z are……….a) 1,2,3b) 1,5,3c) 3,1,5d) 1,3,5
5. The reaction in which heat is liberated arecalled
a) Balanced reactionsb) Exothermic reactionc) Endothermic reactiond) Precipitation reaction
6. One gram molar mass of oxygen isa) 16 Ub) 32 Uc) 16 gd) 32 g
7. The volume occupied by CO2produced by
heating of 10g of lime stonea) 22.4 lb) 11.2 lc) 2.24 ld) 10 l
8. Which of the following metal is used incrackers to produce dazzling white light
a) Pbb) Znc) Mgd) Na
9. CaO + H2O ö’ Ca(OH)
2+ Q. This is a
a) Combination of reactionb) Decomposition reactionc) Displacement reactiond) Double decomposition reaction
10. BaCl2+ Na
2SO
4ö’ BaSO
4+ 2NaCl
representsa) Combination reactionb) Decomposition reactionc) Displacement reactiond) Double decomposition reaction
11. Which of the following process split waterinto H
2and O
2gas?
a) Electrolysisb) Hydrolysisc) Hydrationd) Reduction
12. Which of the following is a displacementreaction?a) Fe
(s)+ CuSO
4(aq)ö’ FeSO
4(aq)+ Cu
(s)
b) Zn(s)
+AgNO3(aq)
ö’Zn(NO3)
2(aq)+ 2Ag
(s)
c) Pb(s)
+ CuCl2(aq)
ö’PbCl2(aq)
+ Cu(s)
d)All the above.
13. NaOH(aq)
+ HCl(aq)
ö’NaCl(aq)
+ H2O
(l). This
is an example fora) Neutralisation reactionb)Acid-base reactionc) Double decomposition reactiond)All the above.
14. Which of the following is an example foroxidation
a) Rusting of ironb) Burning of woodc) Rancidityd)All the above
15. The process of spoilage of food containingoil and fats on long standing is called
a) Decompositionb) Rancidityc) Preservationd) Food poisoning
SELF TEST-2
1. Litmus indicator is obtained froma)Algaeb) Fungic) Lichend) Neem
2. Which of the following gas is liberated whenmetals reacts with acids?
a) H2
b) O2
c) N2
d) H2
or O2
3. Which of the following gas liberated whenNa
2CO
3is treated with HCl?
a) H2
b) O2
c) CO2
d) Cl2
4. The colour of the base with phenolphthaleinindicator
a)Yellowb) Pinkc) Colourlessd) Orange
2. ACIDS, BASES AND SALTS
EXERCISE-1
1 ). 4 2 ). 4 3 ). 3 4 ). 25 ). 2 6 ).3 7 ). 2 8 ).29 ).3 10 ).2 11 ).3 12 ).213 ).1 14 ).2 15 ).1 16 ). 2
5. Which of the following is olfactoryindicator?
a) Onionb) Vanillac) Clove oild)All the above
6. Nature of Metal oxide isa)Acidicb) Neutralc) Basicd)Amphoteric
7. Which of the following element is presentin all acids?
a) Oxygenb) Hydrogenc) Nitrogend) Carbon
8. Which of the following gives yellow colourwith methyl orange?
a) HClb) H
2SO
4
c) HNO3
d) NaOH
9. Which of the following is used to measurethe hydrogen in concentration of solution
a) pHb) pOHc) pk
w
d) pka
10. An acid producing more number of H+ ionin solution is called
a) Strong acidb) Weak acidc) Fatty acidd) Natural acid
11. pH of acid rain isa) 5.6b) >5.6c) <5.6d) 7
12. pH of salts formed by strong acid and strongbase is
a) 7b) 0c) >7d) <7
13. Which of the following combination iswrong?
Name Formulaa) Bleaching powder CaOCl
2
b) Baking soda NaHCO3
c) Washing soda NaOHd) Plaster of paris CaSO
4. ½ H
2O
14. Which of the following is wrong?a) Bleaching powder is used in chlorination ofdrinking waterb) Baking soda is a mild non-corrosive acidc) Washing soda is used in the preparation ofboraxd) Plaster of paris is calcium sulphatehemihydrates
15. Water of crystallisation in washing sodaa) 7b) 5c) 10d) 0
17 ).2 18 ). 2 19 ).2 20 ).4 21 ). 2 22 ).3 23 ).224 ).4 25 ).4 26 ).3 27 ).3 28 ).4 29 ).130).1 31 ).3 32 ).2 33 ).2 34 ).3 35 ).336 ).2 37 ).2 38 ).1 39 ).1 40 ).3 4 1 ).442 ).2 43). 2 44 ).1 45 ).2
EXERCISE-II
1 ).4 2 ).3 3 ).3 4 ).25 ).2 6 ).3 7 ).4 8 ).39 ).3 10 ).3 11 ).4 12 ).313 ).2 14 ).3 15 ). 3SELF TEST-1
1).3 2).1 3).3 4).2 5).4 6).37).2 8).4 9).1 10).1 11).312).1 13).3 14).2 15).3
3. STRUCTURE OF ATOM
EXERCISE-1
1. Which of the following is not present inrainbow?1) Blue2) Green3) Red4) Pink
2. The number of wave peaks that pass by agiven point per unit time is called1) Wavelength2) Wave number3) Frequency4)Amplitude
3. The range of colours or wavelengthscovering red colour to violet colour iscalled the1) Emission spectrum2)Absorption spectrum3) Visible spectrum4) Line spectrum
4. Electromagnetic energy can be gained orlost in discrete values and not in acontinuous manner. This is given by1) Planck2) Rutherford3) Einstein4) Bohr
5. The path of an electron around the nucleusis called1) Orbit2) Shell3) Energy level4) All
6. Which of the following is not included inBohr atomic model?1) Stationary orbits2) Energy of orbits is quantized3) Elliptical orbits4)Absorption of energy when anelectron jumps from lower orbit to
higher orbit.7. The elliptical orbits were proposed by
1) Rutherford2) Bohr3) Sommerfeld4) Schrodinger
8. For a given circular orbits, number ofelliptical orbits possible are1) n2) n - 13) n + 14) (2l + 1)
9. Quantum mechanical model was developedby
1) De Broglie2) Erwin Schrodinger3) Sommerfeld4) Heisenberg
10. Shape of Px
orbital is1) Spherical2) Dumbell3) Double dumbbell4) Circular
11. Which of the following is not true for ‘p’orbital?
1) Shape is dumbbell2) Have one nodal plane3) p-orbitals are perpendicular to one another4) Lobes orient in between the axes
12. Number of subshells in ‘M’ shell1) 12) 23) 34) 4
13. Shape of subshell is given by1) n2) l3) m
l
4) ms
14. What is the maximum value of ‘l’for n = 4 ?1) 12) 23) 34) 4
15. Number of orbitals present in a subshellwith l = 21) 12) 33) 54) 7
16. Orbitals having same energy are called1) Atomic orbitals2) Hybrid orbitals3) Degenerate orbitals4) Purse orbitals
17. Number of electrons present in a subshellwith l = 31) 22) 63) 104) 14
18. Which of the following quantum number isnot required to designate orbital?1) Principal2)Azimuthal3) Magnetic4) Spin
19. Which of the following rule is required towrite the electronic configuration ofelement?1) Pauli’s2) Hund’s3)Aufbau’s4)All the above
20. Filling of electrons in an orbital of subhellsis given by1) Pauli’s rule2)Aufbau’s rule3) Hund’s rule4)All the above
21. Among 2s, 3s, 4s orbitals which one hashighest energy?
1) 2s2) 3s3) 4s4)All have same energy
22. Electronic configuration of nitrogen is?1) 1s22s22p2
2) 1s22s22p3
3) 1s22s22p6
4) 1s22s22p4
23. Which of the following is not a sub atomicparticle
1) Electron2) Proton3) Neutron4) á-particle
24. Which of the following is wrong?1) Electromagnetic waves causes magnetic and
electric fields2) Light is not propagated in vacuum3) Electric and Magnetic fields are
erpendicular to each other4) All electromagnetic radiations travel with
same speed
25. If l =1 for an atom, then the number oforbitals in its subshell is
1) 12) 23) 34) 4
26. Stationary orbits are proposed by1) Thomson2) Lenord3) Rutherford4) Bohr
27. Splitting of spectral lines in electric field iscalled
1) Stark effect2) Photoelectric effect3) Zeeman effect4) Bohr effect
28. Which of the following gives shape ofsubshell?
1) n2) l3) m
l
4) ms
29. The Maximum value of l where n=5 is1) 52) 43) -54) 3
30. f-orbitals are present in1) K2) L3) M4) N
31. Which of the following quantum numbergives orientation of orbital?
1) n2) l3) m
l
4) ms
32. If n = 2, the subshell present in1) s2) s, d3) s, p4) s, p, d
33. The number of orbitals present in ‘M’ shell1) 12) 93) 184) 32
34. The electronic configuration of ‘Cr’ is1) [Ar] 4s23d4
2) [Ar] 4s13d5
3) [Ar] 4s2sp6
4) [Ar] 4s13d54p2
35. Number of orbitals present in a subshellwith l = 3
1) 12) 33) 54) 7
36. ‘VIBGYOR’ is observed in1) IR spectrum2) U.V spectrum3) Visible spectrum4) Entire electromagnetic spectrum
37. Electromagnetic spectrum contain1) U.V2) IR3) Visible4)All the above
38. Which of the following has low wavelength?
1) Violet2) Blue3) Yellow4) Red
39. Which of the following metal is used toproduce yellow colour in street light?
1) Li2) K3) Na4) Cs
40. When an electron jumps from higher orbitto lower orbit, the energy is
1) Released2) Gained3) Constant4) Released or gained
41. The lowest energy status of electron iscalled
1) Ground state2) Excited state3) Vapour state4) Ionised state
42. The splitting of spectral lines gives space1) Line spectrum2) Emission spectrum3) Fine spectra4) Visible spectra
43.According to quantum mechanical model1) Position of electron is determined precisely2) Position of electron not determined recisely3) Electron boundary is fixed4) All are correct
44.As ‘n’value increased, size and energy oforbit
1) Decreases2) Increases3) Decrease and Increases4) Remains constant
45. n = 2, l = 1, then the orbital is representedas
1) 2s2) 2p3) 3s4) 2d
46. l = 1, the possible values of ‘ml’ are1) 0, 12) -1, +13) -1, 0, +14) 0, 1, 2
47. In which of the following orbital theorientation of lobes of orbital is different?
1) dxy
2) dyz
3) dxz
4) dx
2-y
2
48. Which quantum number is required toexplain the doublet given by
alkali and alkaline earth metals?1) n2) l3) m
l
4) ms
49. Maximum number of electrons in any shellis
1) n2
2) n3) 2n2
4) 4n2
50. If two orbitals have same (n+l) value then1) The orbital with low ‘n’ value has highest
energy2) The orbital with more ‘n’ value has highest
energy3) The orbital with low ‘l’ value has highest
energy4) All are correct
EXERCISE-21. An emission spectrum consists of brightspectral lines on a dark back ground.
Which of the following does notcorresponds to bright spectral lines?
1) Frequency of emitted radiations2) Wavelength of emitted radiation3) Energy of emitted radiation4) Velocity of light
2. For ‘l’ the minimum and maximum values are1) 0, 12) n, n – 13) 0, n – 14) 0, n + 1
3. An electron in an atom have following set ofquantum number: n=2, l = 0,
ml=0, m
s= +1/2. The electron belongs to
which orbital?1) 2p2) 2s3) 3s4) 2d
4. Which of the following is defect in Bohrmodel?1) It could not explain fine structure of thespectrum2) It could not explain the spectra of atomscontaining atoms more than one electron3) It could not explain the probability conceptof electron4)All the above
5. When an electron jumps from ‘M’ shell to‘K’ shell. The number of lines in the finespectrum is
1) 12) 33) 64) 4
6.Which of the following is true according toBohr atomic theory?1) Orbits are circular in shape2) Orbits are stationary3) Electrons are bound by definite boundary4)All the above
7. n and ‘l’ values for some orbitals are given.Which of the following orbital has highest
energy?1) n = 2, l = 02) n = 3, l = 13) n = 4, l = 04) n = 3, l = 2
8. Which of the following is not a degenerateorbital?
1) px
2) py
3) pz
4) dxy
9. Which combination is correct?1) n = 2 l =1 s subshell2) n = 2 l =0 p subshell3) n = 2 l =2 d subshell4) n = 2 l =2 f subshell
10. Which of the following orbital has lowestenergy based on (n+l) value?
1) 3d2) 4p3) 4s4) 5s
EXERCISE-I
1).4 2).3 3).3 4).15).4 6).3 7).3 8).29).2 10).2 11).4 12).313).2 14).3 15).3 16).317).4 18).4 19).4 20).321).3 22).2 23).4 24).225).3 26).4 27)1 28).229).2 30).4 31).3 32).333).2 34).2 35).4 36).337).4 38).1 39).3 40).141).1 42).3 43).2 44).245).2 46).3 47).4 48).4
49).3 50).2
EXERCISE-II
1).4 2).3 3).2 4).4 5).26).4 7).4 8).4 9).3 10).3
4. PERIODIC TABLEEXERCISE-11. The number of elements present in modernperiodic table
1) 1062) 1093) 1154) 100
2. Hydrogen atom is the building material andother elements are combination of
hydrogen atoms. This is given by1) Proust2) Boyle3) Lother Meyer4) Moseley
3. Which of the following is not Dobereiner’striad?
1) Li, Na, K2) S, Se, Te3) O, S, Se4) Mn, Cr, Fe
4. In the Dobereiner’s Triad, the atomic weightof middle element is equal to1) Sum of atomic weight of two elements2) Product of atomic weight of two elements3) Average of atomic weight of two elements4) Ratio of atomic weight of two elements
5.According to which law, the 8th element showsimilar property with first element.
1) Triad law2) Law of octaves3) Mosley law4) All of these
6. Mendeleeff’s periodic table (Short form ofperiodic table) consists of
1) 7 periods, 7 groups2) 7 periods, 18 groups3) 7 periods, 8 groups4) 18 periods, 7 groups
7. Sub groupsAand B with same group arepresent in
1) Modern periodic table2) Mosley periodic table3) Mendeleeff’s periodic table4) None of the above
8. ‘Eka’ elements are1) Precious elements2)Available in earth3) Name given by Mendeleeff for missingelements4) Elements in lanthanides
9. The equivalent weight of ‘Be’ is 1) 13.52) 93) 4.54) 4
10. What is the valency of Eka aluminium in itsoxide?
1) 12) 23) 34) 4
11. Which of the following elements atomicweight was corrected by Mendeleeff?
1) Be2) In3)Au4)All the above
12. The pair of elements arranged in thedecreasing role of their atomic weights
in Mendeleeff’s periodic table is1)Anomalous pair2) Inert pair3) Lone pair4)All the above
13. Which of the following scientist leavessome gaps in the period table for futureelements
1) Moseley2) Mendeleeff3) Newlands4) Dobereiner
14. According to Moseley periodic law thephysical and chemical properties of
elements are the periodic functions oftheir
1)Atomic weight2)Atomic number3) Electronic configuration4) 2 or 3
15. The period containing maximum numberof element is
1) 12) 43) 64) 7
16. The periods which contains s, p and d blockelements
1) 12) 23) 34) 4
17. Which of the following group containmaximum elements
1) I A2) II A3) III B4) VIII B
18. The group containing only gaseouselements
1) VII B2) VIIA3)VIIIA4) VIII B
19. Number of liquid elements in periodictable
1) 72) 183) 24) 11
20. VI Agroup elements are calledchalcogens. This is because
1) They are available in earth crust2) The are ore forming elements3) They are salt forming elements4) They are available in native state
21. Which of the following atomic numberbelongs to same period?
1) 5, 6, 72) 1, 3, 53) 2, 4, 64) 9, 17, 35
22. Which pair of elements are in d-block?1) 25, 302) 24, 293) 21, 234)All the above
23. Give period number and group number forthe element with atomic number 17.
1) 2, 122) 6, 163) 3, 174) 6, 17
24. Actinides belongs to1) 4f series2) 5f series3) 6f series4) 7f series
25. Which of the following is not a metalloid?1) Si2) As3) Ge4) Ca
26. The general electronic configuration of ‘d’block elements is
1) ns1 – ns2
2) ns2 – ns2np1
3) (n-1)d1-5ns1-2
4) (n-1)d1-10ns1-2
27. Which of the following is not a non-metal?1) Si2) P3) Cl4) S
28. Valency of element in terms of oxygen is
1) Equal to number of oxygen atom withwhich one atom of element combines
2) Double to number of oxygen atomwith which one atom of element combines
3) Half of the number of oxygen atomwith which one atom of element combines
4)All the above
29. The radius is measured in1) Pico meter2) Pyro meter3) Picno meter4) None of the above
30. Which of the following has smallest size?1) F2) Cl3) Be4) I
31. The size of anion is more than neutral atom.This is due to1) More nuclear charge in anion than neutralatom2) Less nuclear charge in anion than neutralatom3) More number of protons in anion4) Less number of electrons in neutral atom
32. Which of the following is correct withrespect to size?
1)Atom < Anion < Cation2) Atom < Atom < Cation3) Cation <Atom < Anion4) Cation <Anion < Atom
33. Iso electronic species have same number of1) Atoms2) Electrons3) Protons4) Neutrons
34. M+ + IE2
ö’ M+2(g)
+ e-. This represents1) Electron affinity2) Ionization energy3) Second ionization energy4) Electronegativity
35. I.E Depends on1)Atomic radius2) Stable configuration3) Screening effect4)All the above
36. The I.E of ‘N’ is more than oxygen eventhough the size of ‘O’ is less than ‘N’.
This is due to1) Half-filled configuration in ‘N’2) Half-filled configuration in ‘O’3) Fullfilled configuration in ‘N’4) Fullfilled configuration in ‘O’
37. The elements with least I.E is1) Li2) Na3) K4) Cs
38. Ionization energy of ‘Na’ is more than ‘Cs’.This because1) The size of ‘Na’ is more than ‘Cs’2) The size of Cs is more than Na3) The electronegativity of ‘Na’ is more than‘Cs’4) The electronegativity of ‘Cs’ is more than‘Na’
39. Which of the following order of IE’s iscorrect?
1) IE1> IE
2> IE
3
2) IE1< IE
2< IE
3
3) IE1< IE
2= IE
3
4) IE1> IE
3> IE
3
40. When an electron is added to negative Ion,the energy is
1) Released2)Absorbed3) Released or absorbed4) Non of the above
41. For which of the following elements, theelectron affinity values are positive?
1)Alkali metals2)Alkaline earth metals3) Halogens4) Chalcogens
42. The value of electron affinity of mostreactive halogen is
1) 3282) 3493) 3254) 295
43. Which of the following is the property ofbonded atom?
1) Ionization energy2) Electron affinity3) Electronegativity4)Atomic radius
44. The property of bonded atom to attractbonded electron towards itself is called
1) Electron affinity2) Electronegativity3) Electron gain enthalphy4) Ionization energy
45. In a group, the electronegativity is1) Decreases2) Increases3) Remain same4) Decreases and then increases
46. Which of the following scale is based onbond energy for measuring electronegativity?
1) Milliken2) Pauling3) Boyle4) Rutherford
47. Which of the following is most activemetal ?
1) Lithium2) Sodium3) Potassium4) Rubidium
48. The metallic and non-metallic nature in aperiod
1) Decreases, decreases2) Increases, increases3) Decreases, increases4) Increases, decreases
49. Noble gases belongs to1)VIIIA2) VIA3) VII B4) VIII B
50. Nitrogen (Z=7) is the element of thegroup V of the periodic table.
Which of the following is the atomicnumber of the next element in the group
1) 92) 143) 154) 17
51. Modern periodic law is based on1)Atomic number2)Atomic weight3) Atomic mass4)Atomic volume
EXERCISE-II
1. The atomic weights of lithium and potassiumare 7 and 39. The atomic weight of sodiumaccording to Dobereiner.
1) 72) 393) 234) 11
2. The formula of oxides and chloride of EkaSilicon is
1) ESO2, ESCl
2
2) ES2O
3, ESCl
4
3) ES2&, ESCl
4
4) ESO&, ESCl
3. Match the following.Atomic Number Element
1) 50 (a) Th2) 80 (a) Hg3) 90 (a) Fm4) 100 (a) Sn
1) 1-a, 2-b, 3-c, 4-d2) 1-d, 2-b, 3-a, 4-c3) 1-d, 2-a, 3-b, 4-c4) 1-d, 2-c, 3-b, 4-a
4. In which of the following elements, thedifferentiating electron enters intoantepenultimate shell
1) Representative elements2) Transition elements3) Inner transition elements4) Noble gases
5. Which of the set of elements are not d-blockelements?
1) Fe, Co, Ni2) Cu,Ag, Cu3) Zn, Cd, Hg4) Ga, Ge, As
6. Which pair of atomic number are in actinoidseries?
1) 60, 702) 90, 1003) 50, 604) 30, 40
7. Periodicity is observed in periodic table dueto reappearance of similar valency shell
Configuration after regular interval of1) 1,3,5,7,92) 2,8,8,18,18,323) 5,10,15,20,254) 20,30,40,50
8. The number of ‘f’block elements present in6th period
1) 22) 83) 144) 6
9. Which of the following metal has highestthird ionization potential?
1) He2) Na3) Mg4) Al
10. Which of the following order is correct forionization energy of Be, B, N, O etc?
1) Be<B<N<O2) Be>B>N>O3) B<Be<O<N4) B<Be<N<O
11.A sudden jump at second ionization potentialis observed for an element.
This element belongs to which group inperiodic table?
1) Zero group2) I group3) II group4) III group
12. Which of the following statement is wrong?
1) Nuclear charge increases with atomicnumber2) Order of screening effect : s<p<d<f3) Order of penetrating power : s>p>d>f4) Nuclear charge increases in a group from topto bottom
13. The size of ‘F2’ is less than ‘Cl
2’. But the
electron gain enthalphy of chlorine is morethan fluorine. This is due to1) More repulsion between electron in‘2p’subshell and added electron is ‘F’2) Less repulsion between electron in ‘2p’subshell and added electron is ‘F’3) More repulsion between electron in ‘3p’subshell and added electron is chlorine4) Allthe above
SELFTEST-11. Which of the following is not a Dobereiner’striad?
1) Li, Na, K2) Ca, Sr, Ba3) N, Na, Ne4) Cl, Br, I
2. Mendeleeff classified the elements on thebasis of
1)Atomic number2)Atomic weight3) Electronic configuration4)Atomic volume
3. Which of the pair of elements is exampleforAnomalous pair?
1) Te & I2) Na & K3) Cl & Br4) O & N
4. The properties of elements depends on1)Atomic weights2) Number of shells3) Electronic configuration4) Number of protons
5. Longest period in the periodic table1) 12) 43) 34) 6
6. Period number of an element is equal to
1) Number of main shells2) Number of valency electrons3) Total number of electrons4)Any one of the above
7. Which of the following is not a lanthanoid?1) La2) Ce3) Lu4) Eu
8. Which of the following is metalloid?1) Cu2) Si3)Ag4) Fe
9. Valency in a period1) Increases2) Decreases3) Increases and then Decreases4) Decreases and then Increases
10. Atomic radius in a period decreases due to1) Increase in atomic number2) Decrease in atomic number
3) Increases in nuclear charge4) Decrease in nuclear charge
11. Among C4-, N3-, O2-, F- ions, the ion withsmall size is
1) C4-
2) N3-
3) O2-
4) F-
12. Ionization potential depends on1) Nuclear charge2) Presentation power of orbital3) Screening effect4)All the above
13. ‘N’ has more ionization potential than ‘O’This is due to
1) Stable electronic configuration in ‘O’2) Stable electronic configuration in ‘N’3) Large size of oxygen than ‘N’4) Nitrogen most abundant gas
14. The element with highest electronegativityon Pauling scale has a value of
1) 32) 2.83) 44) 2.2
15. Which of the following is more metallicelement?
1) Na2) Mg3) Al4) Si
EXERCISE-I
1).3 2).1 3).3 4).3 5).2 6).37).2 8).3 9).3 10).3 11).4 12).1
13).2 14).4 15).3 16).4 17).318).3 19).2 20).2 21).1 22).423).3 24).2 25).4 26).4 27).128).2 29).1 30).1 31).2 32).333).2 34).3 35).4 36).1 37).438).2 39).2 40).2 41).2 42).143).3 44).2 45).1 46).2 47).448).3 49).1 50).3 51).1EXERCISE-2
1).3 2).3 3).2 4).35).4 6).2 7).2 8).39).3 10).3 11).2 12).2
13).1SELF TEST-1
1).3 2).2 3).1 4).3 5).4 6).17).1 8).2 9).3 10).3 11).412).4 13).2 14).3 15).1
5. Chemical bonding
1. The forces that exist between atomsin a molecule is1)Gravitational 2) Magnetic3) Electrostatic 4) None
2. Which of the following noble gas does notcontain eight electrons in valence shell ?1) Ar 2) Ne 3) He 4) Kr
3. Lewis representaion of ‘Ne’ is
1) Ne : 2) 3) xxNe 4)
4. The nature of chemical bond wasexplained by1) Electron gas theory2) Electronic theoryof valence3) Electro chemical theory4) Hybridisation
5. Whichof thefollowingelementdoesnot formmolecule?1) Hydrogen 2) Chlorine3)Argon 4) Oxygen
6. Which of the following does not containeight electrons in the valency shell ?
1) Na 2) Na 3) 2Mg 4) 3Al
7. The number of electron lost or gain byelements is called1)Atomicity 2) Valence3) Molecularity 4) None of these
8. The electrostatic force of attractionbetween ions is called1)Covalent bond 2) Ionic bond
3) bond 4) pi bond
9. The bond present between metal and non-metal is1) Ionic 2) Covalent
3) Metallic 4) Dative10. Ionic bond is absent in
1) NaCl 2) 3AlCl
3) MgO 4) 2H O
11. Which of the following metal form Ionicbond easily1) Li 2) Na 3) K 4) Cs
12. Which of the followingionic compound formedeasily?1) NaCl 2) RbCl 3) CsCl 4)KCl
13. Which of the following is not correct for Ioniccompounds ?1) These are solids2) Conduct electricity in solid state3) Have high M.P’s4) Soluble in water
14. The electronegativity of element ‘A’and ‘B’is 1 and 3 respectively. The nature of bondbetween A and B is1) Covalent bond2) Ionic bond3) Dative bond4) Metallic bond
15. Ionic compounds are soluble in1) Polar solvents2) Non- polar solvents3) Both polar and Non-polar solvents4) None of the above
16. Which of the following is a property of ioniccompounds ?1) Have high M.P and B.P’s2) Non-directional bond3) High reactivity4)All the above
17. The co-ordination number of Na in NaCl1) 4 2) 6 3) 8 4) 12
18. NaCl contains1) NaCl units 2) Randomly arranged ions3) Orderlyarranged ion 4) NaCl molecule
19. Covalent bond was explained by1) Kossel 2) Lewis 3) Pauling 4) Sidgwick
20. Number of wlwctrons given by an atom ofelement in the formation of covalent bondis equal to1) Number of valence electrons2) total number of electrons3) electrons required to get octet configuration4) Equal to number of atoms in a molecule
21. Non-metal mainly forms1) Ionic bond 2) Covalent bond3) Metallic bond 4)All
22. Number of electron paired shared with
formation of 2N molecule
1) 1 2) 2 3) 3 4) 4
23. Shape of 2BeCl is1) Tetrahedral 2) Linear3) Pyramidal 4)Trigonal planar
24. Which of the following does not certain octet?
1) 4CH 2) 2H O 3) 3BF 4) 3NH
25. Number of lone pair and bond pairs in 3NH
is1) 1 , 1 2) 1 , 2 3) 3 , 1 4) 1 , 3
26. Which of the following is strong bond ?1) Covalent 2) Ionic 3) bond 4) bond
27. Which of the following covalent compound issoluble in water ?1) Napthalene 2) kerosene3) HCl 4)All the above
28. The bond angles in 2 3 2BeCl , BF , H O is
1) 0 0 ' 0180 ,109 28 , 104 31'
2) 0 0 0180 ,120 , 104 31'
3) 0 0 0109 28',120 , 180
4) 0 0 0104 31' , 109 28' , 120
29. In which of the following 2sp p bond is
present ?
1) 2BeCl 2) 3BF 3) 3NH 4) 2H O
30. The process of inter mixing of atomic orbitalis called1) Combination 2) Decomposition3) Hybridisation 4) Overlapping
31. Octet configuration is absent in1) He 2) Ne 3)Ar 4) Kr
32. VBT was proposed by1) Kossel 2) Lewis 3) Pauling 4) Sidgwick
33. Which of the following is electronegative?1) Sodium 2) Oxygen3)Magnesium 4) Calcium
34. An element ‘A’forms a chloride ‘ 4ACl ’. Thenumber of electrons in the valency shell of‘A’1) 1 2) 2 3) 3 4) 4
35. Which of the following compound hasdifferent bond ?
1) NaCl 2) 2Na O 3) 2H O 4) CaO36. Atomic numbers of two elements are given.
The ionic bond is formed between1) 11 , 19 2) 11 , 17 3) 7 , 8 4) 9, 17
37. The difference in electronegativity betweentwo elements is more than 1.9. Then the bondformed between the elements is1) Covalent 2) Ionic3) Covalent or ionic 4) Metallic
38. Co-ordinate covalent bond is present in
1) 3NH 2) 3pH 3) 2H O 4)3H O
39. Who among the following extract metalslike sodium and potassium by electrolysisof fused salts ?1) Davy 2) Downs 3) Castner 4)Pauling
40. How many electrons are required to VI-group elements to get octet configuration?1) 1 2) 6 3) 2 4) 4
41. Number of valency electrons present inzero group elements is1) 0 2) 6 3) 8 4) 12
42. Which of the following bond iselectrostatic bond1) Metallic 2) Ionic 3) Covalent 4) Dative
43. The bonds present in4NH is
1) Covalent only2) ionic only3) Covalent and ionic4) Covalent and co-ordinate covalent
44. Which of the following is a crystallinesolids?
1) 2H O 2) 3NH 3) HCl 4) NaCl
45. What would be the bond angle is 2H O
according to VBT ?
1) 0120 2) 090 3) 0104 31' 4) 0107 48'
46. The shape of 3NH is1) Tetrahedral 2) Pyramidal3)Trigonal planar 4)Angular
47. In which of the following molecule Ione-lone pair repulsion is present...
1) 3NH 2) 3BF 3) 2H O 4) HCl48. Which of the following is soluble in polar
and non-polar aolvents?
1) NaCl 2) HCl 3) 2 6C H 4) 4CH
49. Main draw back of electronic theory ofvalency1) It could not explain bond angles2) It could not explain bond energies3) It could not explain shapes of molecules4) all the above
50. One Angstrom 0 A equal to
1) 1010 metre 2) 0.1 nm3) 100pm 4)All the above
51. Ionicbond is formed betweenIAgroup andVIIAgroup, because1) IAgroup anion & VIIAgroup form cation2) IAgroup cation & VIIAgroup form anion3) IAgroup cation & VIIAgroup cation4) IAgroup anion & VIIAgroup from anion
52. The valency of which of the followingelement is not equal to group number1) Na 2) Mg 3)Al 4) Cl
53. which of the following compound has highmelting point ?1) NaCl 2) NaF 3) NaBr 4) Nal
54. In the formation of NaCl. ‘Na’ act as1) Oxidising agent 2) Reducing agent3) Redox 4) Chlorinating agent
55. The coordination of Na and Cl in NaClis1) 6 , 8 2) 2 , 6 3) 6 , 6 4) 8,8
56. Which of the following is correct for ioniccompound ?1) Ioniccompoundsareconductors insolid state2) They are soluble in non-polar solvents3) Theyconducts electricitymolten state4) Ionic bond is directional.
57. According to VBT, the type of bond innitrogen molecules is
1) x xOne P P 2) x xTwo P P
3) y yOne P P 4) y yTwo P P
58. Number of bonds in 2 2O and N are1) 1 , 1 2) 2 , 2 3) 1 , 2 4) 3,3
59. The units of bond dissociation energy1) nm 2) A 3) KJ/mole 4) calories
60. Which of the following has large bondlength
1) 2F 2) 2H 3) 2Cl 4) 2l
61. A molecule contain three bonds. Pairs andone lone pair. The bond angle in themolecule is
1) 0120 2) 0107 3) 0104 4) 0109 28'
62. Which of the following orbitals areoverlapped to form covalent bond?1) Half-filled orbitalswith same spin2)Half-filled orbitalswith opposite spin3) filled orbitals with same spin4)filled orbitals with opposite spin
63. In which of following molecules undergoes3sp hybridisation ?
1) 4CH 2) 2H O 3) 3NH 4) All the above64. Hybridisation, shape and bond angle in
water molecule is
1) 3sp , Tetrahedral, 0109 28'
2) 3sp , ‘V’ shape , 0104 31'
3) 3sp , Trigonal planar , 0107 48'
4) sp , ‘V’ Shape, 0104 31'
65. Inwhichofthefollowingmoleculesthebondangle
is 0109 28' ?
1) 2BeCl 2) 3BF 3) 4CH 4) 3NH
Chemical bonding---Key1. 3 2. 3 3. 2 4. 2 5. 3 6. 2 7. 28. 2 9.1 10. 4 11. 4 12. 3 13.2 14.215.1 16.4 17. 2 18.3 19.2 20.3 21.222.3 23. 2 24.3 25. 4 26. 1 27. 3 28.229. 3 30. 3 31. 1 32. 3 33. 2 34. 4 35.336. 1 37. 2 38. 4 39. 1 40.3 41.3 42.243. 4 44. 4 45. 2 46. 2 47. 3 48. 2 49.450. 4 51. 2 52. 4 53. 2 54. 2 55. 3 56.257. 3 58. 2 59. 3 60. 4 61. 2 62. 2 63.464.2 65. 3
6. Principles of metallurgy1. Which of the following is a carbonate ore?
1) Magnesite 2) Bauxite3) Gypsum 4) Galena
2. The oil used in the froth floatation process is1) Kerosene oil 2) pine oil3) Coconut oil 4) Olive oil
3. Galena is an ore of1) Zn 2) Pb 3) Hg 4)Al
4. The reducing agent in thermite process is1)Al 2) Mg 3) Fe 4) Si
5. The most abundant metal in the earth’s crustis1) Silver 2)Aluminium 3) Zinc 4) Iron
6. Which of the following is moderate reactiveelement?1) Na 2) Fe 3)Ag 4)Al
7. Iron ore is concentrated by1) Roasting 2) magnetite treatment3) Electrolysis 4) Froth floatation
8. An important ore of manganese is1) Galena 2) Dolamite3) Pyrolusite 4) Haematite
9. Rusting of Iron is1) Decomposition 2) Reduction3) Oxidation 4) Neutralisation
10. Which of the following is used as reducingagent in metallurgical process?
1) Coke 2) 2O 3) 4KMnO 4) None11. Generally metallic oxides are converted into
metals by1) Roasting 2) Calcination3) Oxidation 4) Reduction
12. Which of the following is a roasting process?
1)3 2Mg CO MgO CO
2)2 22PbS 3O 2PbO 2SO
3)2 3 2Fe O 3CO 2Fe 3CO
4)2 2 22Cu O Cu S 6Cu 3O
13. Alloying is a method of.........the propertiesof a metal.1) Improving 2) removing 3)Shining4)oxidising
14. The flux used in the extraction of Iron1) Lime stone 2) Silica3) Flint 4)All the above
15. Specific gravity of slag is always1) Greater than molten metal2) Less than molten metal3) Same as molten metal4) None
16. Poling process is employed for the removalof
1) 2Cu O from Cu 2) 2 3Al O from Al
3) 2 3Fe O from Fe 4) None17. Mercury has low boiling point. Therefore it
can be purified by the process of1) Liquation 2) Poling3) Oxidation 4)Distillation
18. Highly electropositive metals cannot beextracted by carbon reduction because1) Metals from carbides2) Metals do not react with carbon3) Metal oxides are not reduced by carbon4) Metals are not reduced by carbon
19. Roasting is carried out to1) Convert sulphide ore to oxide2) Remove water of hydration3) Melt the ore 4) None
20. Which of the following processes makes theore porous1)Distillation 2) Reduction3) Calcination 4)All of these
21. In thermite process, the reducing agent is1) C 2)Al 3) Na 4) Ni
22. The method used for the concentration ofsulphide ores1) Froth floatation 2)Smelting3) Magnetic separation 4) Gravityseparation
23. Which of the following is the outlet throughwhich flue gases go out the furnace?1) Chimney 2) Flux 3) Hearth 4) Fire box
24. Which of the following is the formula ofcalcium silicate?
1) 3CaSiO 2) CaSiO 3) 2CaSiO 4) CaSi25. The process of obtaining the pure metal from
the impure metal is called ......... of the metal1) Liquation 2) Refining 3) Poling 4)Distillation
26. Which of the following is an example ofcorrosion?1) Development of green coating on copper2) Rustingof iron3)Tarnishingof silver 4)All the above
27. Which of the following is added to the ore toremove the gangue from it?1) Flux 2) Chimney 3) Fire box 4) Hearth
28. Which of the following is the part of thefurnace where the fuel is kept for burning?1) Fire box 2) Chimney 3) Flux 4) Hearth
29. In the word chalcogen, ‘Chalco’ means1) Produce 2) Ore 3) Slag 4) Mineral
Principles of metallurgy -- Key1. 1 2. 2 3. 2 4. 1 5. 2 6. 2 7. 28. 3 9. 3 10.1 11. 4 12. 2 13. 1 14. 115. 2 16. 1 17. 4 18. 3 19. 1 20. 3 21. 222. 1 23. 1 24. 1 25. 2 26. 2 27. 1 28. 129. 2
7. Carbon and its Compounds1. No of covalent bonds formed by carbon in its
compounds is1) 1 2) 4 3) 6 4) 12
2. The hybridisation in methane is
1) 3sp 2) 2sp 3) SP 4) 3SP d3. Number of and bonds in ethylene is
1) 1 , 4 2) 2 , 5 3) 1 , 5 4) 0 , 44. Number of c - c bonds in Acetylene is
1) 1 2) 2 3) 3 4) 4
5. Number of sp - s bond in 2 2C H is1) 1 2) 2 3) 3 4) 4
6. Type of bonds in methane is
1) 3sp s 2) 3 3sp sp 3) 3sp p 4) 2sp s
7. The phenomenon of existence of sameelement in different physical form is called1) Isomerism 2)Allotropy3)Sublimation 4) Isotopes
8. Whichof the following is not crystalline allotropeof carbon ?
1) Diamond 2) Graphite 3) 60C 4) Lamp black
9. Which of the following is covalent net-worksolid?1) Glass 2) Salt3) Diamond 4) Rock
10. Diamond is hard. This is due to1) Strong bonds 2) Networkstructure 3) High refractive index 4) Allthe above
11. Forces present between layers in graphiteare1) Strong electrostatic forces2) Bond forces3) Dipole - dipole forces4) Ionic forces
12. Graphite is a good conductor of electricitydue to presence of1) Localised electrons2) Delocalised electrons3) Layered arrangement of carbons4)All the above
13. Which of the following has a foot-ball likestructure1) Diamond 2) Nanotubes3) Buckminster fullerenes 4)All the above
14. Which of the following is used inmelanoma?1) Nanotubes 2) Graphite3) Charcoal 4) Fullerenes
15. Nanotubes were discovered by1) Kroto & Smalley 2) Sumio li jima3) F. Curl 4)Pauling
16. Graphene contains1) Copper 2) Carbon 3) Silicon 4)Sulphur
17. First prepared organic compound urea
2 2NH CONH is prepared from
1) 4NH NCO 2) 4NH CNO
3) 3 2CH CONH 4) 3CH COOH
18. The ability of an element to form chainsand rings with same atoms is called1)Allotropy 2) Isomerism3) Catenation 4) Isomerisation
19. Carbon forms large number of compoundsdue to1) Catenation 2)Sblimation3) Evaporation 4)All the above
20. Which of the following is closed chainhydrocarbon?1) Butane 2) Pentane3) Cyclo pentane 4) Neo pentane
21. Hydrocarbons contain1) Carbon 2) Carbon and Hydrogen3) Carbon, Hydrogen and oxygen4) Carbon and oxygen
22. Formula of formaldehyde is
1) 3CH CHO 2) HCHO
3) 3CH OH 4) 3CH COOH
23. The compounds having same molecularformula but different properties are called1)Allotropes 2) Isotopes 3) Isomers4) Iso electronic species
24. The phenomenon of existence of two or morestructures for a given molecular formula iscalled1) Isomerism 2)Allotropy3) Isotropy 4) Catenation
25. The number of Isomers possible for a compound
with molecular formula 5 12C H
1) 2 2) 3 3) 4 4) 526. Which of the following is isomer of n - butane?
1) 2 - methyl propane 2) 2 - methyl butane3) 2- butane 4) 2 - methyl butane
27. Homologous in the homologous series arediffer by
1) 3CH group 2) CH group
3) 2CH group 4)All the above28. The generl formula of alkenes
1) n 2n 2C H 2) n 2nC H 3) n 2n 1C H 4) n 2n 1C H
29. Which of the following is not included in thesame homologous series?
1) 4CH 2) 2 6C H 3) 2 4C H 4) 3 8C H
30. The individual member in the homologousseries1) Isotope 2)Allotrope 3) Isomer 4) Homologues
31. The group responsible for characteristicproperties of a organic compound is1)Alkyl Group2) Functional Group3) Periodic Group4) Carbon Chain
32. The nature of second grade functional groupsis given by1) Primaryprefix 2) Secondary prefix3)Primarysuffix 4) Secondarysuffix
33. The root word for compound containing fourcarbon1) eth 2) but 3) pent 4) oct
34. The IUPAC name of Ethyl alcohol is1) Ethanal 2) Ethanol3) Ethanoic acid 4) Grain alcohol
35. The IUPAC name of Acetic acid is1) Ethanoic acid 2) Methanoic acid3) Glacial acetic acid 4) Ethanal
36. The IUPAC name of carboxylic acid presentin red ants1) Formic acid 2)Acetic acid3) Methanoic acid 4) Ethanoic acid
37. IUPAC name of gas used forripening of fruits1) Ethylene 2) Ethene 3) Acetylene 4)Ethyne
38. Carbon compounds undergoes1) Combustion reaction2)Addition reaction3) Substitution reaction4)All the above
39. Whichof thefollowingcompoundsburnswithsooty flame?1) Saturated hydrocarbons2) Unsaturated hydrocarbons3)Aromatic compounds4)All the above
40. Coversion of ethyl alcohol intoAcetic acid is1) Combustion 2) Oxidation3) addition 4) Substitution
41. Saturated hydrocarbon undergoes1) Combustion 2) Oxidation3) addition 4)Substitution
42. Catalyst in Hydrogenation reaction is1) Fe 2) Ni 3) MO 4)pt
43. Reaction between methane ( 4CH ) andchlorine in presence of sunlight is a1) Oxidation reaction 2)Combustion reaction3)addition reaction 4)Substitution reaction
44. Pure ethanol (100%) is called1) Rectified spirit 2) Denaturated spirit3)Absolute alcohol 4) Wood spirit
45. Boiling point of ethyl alcohol is
1) 0100 C 2) 78.3 K 3) 078.3 C 4) 00 C
46. Whichof the following isused as dehydratingagent?
1) 3Con.HNO 2) Conc.Hcl
3) 2 4Con.H SO 4) 2 4Dil.H SO
47. Which of the following is formed when
alcohol is treated with 2 4Con.H SO at 0170 C ?
1) Ethanal 2) Ethene3) Ethane 4) Ethanol
48. 5 - 8 % solution of acetic acid is1) Spirit 2)Vinegar3) Tincture of Iodine 4) Formalin
49. ka2P of CH COOH is
1) 7 2) 4.76 3) 4.67 4) 6.7450. kaP is equal to
1) Ka 2) 10log Ka
3) 10log H 4) 10log H 51. Which of the following compounds have
sweet smell?1)Acids 2) Esters3) Ethers 4)Amides
52. Which of the following is ester?1) Ethanol 2) Ethanoic acid3) Ethylacetate 4) Ethoxyether
53. Which of the following process is used toprepare soaps?1) Fermentation 2) Saponification3)Esterification 4)Chlorination
54. Alkaline hydrolysis of fats is called1)Esterification 2) Saponification3)Esterification 4)Chlorination
55. Fats are triesters of fatty acids and1) Carboxylic 2) Glycerol3) Soap 4) Glycol
56. The size of particles in colloidal solution is1) 1 - 10 nm 2) 1 - 100 nm3) 10 - 100 nm 4) 1 - 1000 nm
57. The minimumconcentration of soap solutionto form micelle is called1) GMC 2) TMC3) CMC 4) PMC
58. Which of the following solution of acetic acidin water can be used as preservative?1) 5 - 10% 2) 10 - 15%3) 15 - 20% 4) 100%
59. Acetic acid, when dissolved in water itdissociates into ions reversibly because it is1) Weak acid 2) Strong acid3) Weak base 4) Strong base
60. Combustion of hydrocarbon is generallyaccompanied by the evolution of1) Heat 2) Light3) Both heat and light 4) Electric current
61. A compound which is basic constituent inmany cough syrups is1) Ethyl cyanide 2) Ethyl alcohol3)Vinegar 4) Urea
72. 4
alkalineKMnO
3 2CH CH OH x y. Which of the
following of true aboutY?1) It is an acid2) It is used as preservative in the pickles3) The IUPAC name of Yis Ethanoic acid4)All are correct
73. Which of the following is not a mixture ofcarbon compound?1) Gasohol 2) Kerosene3) Gun powder 4) Denatured spirit
74. Which of the following is true about micelle?1) It is formed by soap solution2) It is asociated colloid3)Micelle do not precipitate due to ion-ionrepulsion4)All the above
75. 2 ml of ethanoic acid was taken in each ofthe three test tubes A,B and C and 2ml, 4mland 8ml water was added to them,respectively. A clear solution is obtained in1) Test tubeAonly2) Test tubeAand B only3) Test tube B and C only4)All test tubes
76. A few drops of ethanoic acid were added tosolid sodium carbonate. The possible resultsof the reactions are1)Ahissing sound was evolved2) Brown fumes evolved3) Brisk effervescene occured4)Apungent smelling gas evolved
77. Two carbon compounds A and B have
molecular formula 3 8 3 6C H and C H . Which ofthe two is most likely to show additionreactions?
1) 3 8C H 2) 3 6C H
3) 3 8 3 6C H and C H 4) Neither 3 8 3 6C H nor C H
78. Anorganiccompoundwithmolecularformula
2 4 2C H O produces brisk effervescence onadditon of sodium carbonate or bicarbonate.Then the compound and gas evolved is1) Ethyl alcohol, hydrogen
2)Acetic acid, 2H
3)Acetic acid, 2CO
4) Ethyl alcohol, 2CO
79. The shape in which carbon atoms arearranged in diamond is1) Square planar 2) Tetrahedral3)Trigonal planar 4) Linear
62. IUPAC name of alkene containing 3 carbonatoms is1) Propane 2) Propene3) Propyne 4) Propanol
63. Carbon undergoes hybridisation in excitedstate. The energy for excitation is obtainedfrom1) Neighbouring atoms 2) From bond energies3) Self generated 4)All
64. Acytelen contains1) sp - sp bond 2) sp - s bond3) p - p - pi bond 4)All the above
65. Diamond and graphite are Allotropes ofcarbon. Graphite is good conductor but notdiamond. This is due to1) Tetrahedral arrangement of carbons indiamond2)Trigonal arrangement of carbons in graphite3) Delocalised electron system in graphite4) Delocalised electron system in diamond
66. Which of the following is better conductorthan copper?1) Graphite 2) Buckminster fullerene3) Graphene 4) None
67. Wohler used Ammonium cyanate
4NH CNO an inorganic compound to
prepare first organic compound urea
2 2NH CONH . The first compound is
obtained by mixing1) Silver chloride &Ammonium cyanide2) Silver Nitrate &Ammonium cyanide3) Silver cyanide&Ammonium chloride4) Silver sulphide &Ammonium Nitrate
68. A compound ‘X’ is used as preservative inthe pickles in dilute solution. The nature ofcompound ‘X’ is1) Ester 2)Acid 3)Alcohol 4)Amine
69. The number of structural isomer possiblefor a hydrocarbon with molecular formula
6 14C H is1) 4 2) 5 3) 6 4) 8
70. The molar mass of a first member in ahomologous series is 28, then the molarmass of third member in the series is1) 28 2) 14 3) 56 4) 70
71. Which of the following suffix is used toindicate the nature of compound formed byreaction between carboxylic acid and
alcohol is presence of 2 4conc.H SO
1) oic acid 2) -oate3) oyl halide 4) carbonitrite
80. The formula of chloroform is
1) 3CH Cl 2) 2CH C 2l 3) CH C 3l 4) CC 4l
81. Alkenes and Alkynes are1) Isobars2) Unsaturated hydrocarbons3) Saturated hydrocarbons4) None
82. The name of 2NH group is1) acid group 2)Amine group3) Ester group 4) Ketone group
83. The hydrocarbon used for artificial refiningof fruits is1) Ethene 2)Acetylene3) Ethane 4) Benzene
84. The name of 6 10C H is1) Hexane 2) Hexyne 3) Octane 4) Hexene
85. The process of obtaining of soap from oilsor fats by hydrolysis in presence of base iscalled1) Defecation 2) Saponification3) Carbonation 4)Sulphitation
86. TheAromatic hydrocarbon is1) Benzene 2)Acetylene3) Ethene 4) Pentene
87. Functional group inAldehydes is1) - C - O - C - 2) - CHO
3) - CO - 2NH 4) - CO - C88. Molecular formula of hexane
1) 6 14C H 2) 6 12C H 3) 6 6C H
4) 6 10C H
89. The number of carbon atoms in Buckminsterfullerene1) 20 2) 30 3) 60 4) 50
90. Compounds having the same molecularformula but different structural formulae arecalled1)Allotropes 2) Isomers3) Isotopes 4)Isobars
91. Allotrope of carbon among the following1) Propane 2) Ethene 3) Coke 4) Ethane
92. Alkenes undergoes the following reactions.1) Substitution reactions2)Addition reactions3) Condensation reactions4)Elimination reactions
93. The formula of Alkane
1) n 2nC H 2) n 2n 2C H 3) n 2n 2C H 4) n 2n 6C H
94. The formula for Butyne is
1) 2 6C H 2) 5 8C H
3) 4 6C H 4) 5 10C H
95. The reaction 3 6 2 3 8C H H C H is anexample for1) Substitution 2)Addition3) Polymerisation 4)Esterification
96. Alcohol is prepared by the fermentationof one of the following.1) Bagasse 2) Pressmud3) Starch 4) Cane
97. The gas evolved in fermentation is
1) 2SO 2) 2CO
3) 2N 4) 2O
98. Oil on hydrogenation give1) Saturated fatty acids2) Unsaturated fatty acids3) Unsaturated oils4) Fats
99. Soaps are1) Salts of fatty acids2) Triesters of glycerol and fatty acids3) Fattyalcohol sulphates4) Fatty alcohols
100. The formula for stearic acid is
1) 17 33C H COOH 2) 17 35C H COOH
3) 12 22 11C H O 4) 2 5C H OH
Carbon and its Compounds - Key
1. 2 2. 1 3. 3 4. 15. 2 6. 1 7. 2 8. 49. 3 10. 1 11. 2 12. 213. 3 14. 4 15. 2 16. 217. 2 18. 3 19. 1 20. 321. 2 22. 2 23. 3 24. 125. 2 26. 1 27. 3 28. 229. 3 30. 4 31. 2 32. 233. 2 34. 2 35. 1 36. 337. 2 38. 4 39. 3 40. 241. 4 42. 2 43. 4 44. 345. 3 46. 3 47. 2 48. 249. 2 50. 2 51. 2 52. 353. 2 54. 2 55. 2 56. 457. 3 58. 1 59. 1 60. 3
61. 2 62. 2 63. 2 64. 465. 3 66. 3 67. 3 68. 269. 2 70. 3 71. 2 72. 473. 3 74. 4 75. 4 76. 377. 1 78. 3 79. 2 80. 381. 2 82. 2 83. 1 84. 2
85. 2 86. 1 87. 2 88. 289. 3 90. 2 91. 3 92. 293. 3 94. 3 95. 2 96. 397. 2 98. 4 99. 2 100. 2
