1. UPSEEPAST PAPERCHEMISTRY- UNSOLVED PAPER - 2002

2. SECTION I Single Correct Answer Type There are five parts in this question. Four choices are given for each part and one of them iscorrect. Indicate you choice of the correct answer for each part in your answer-book bywriting the letter (a), (b), (c) or (d) whichever is appropriate 3. 01 Problem The lightest particle is : -particle positron proton neutron 4. 02 Problem In a gaseous reversible reaction N2 + O2 2NO + heat If pressure is increased then equilibrium constant would be : a. Unchanged b. Increased c. Decreased d. Sometimes of any atom or ion containing one electron only The spectrum ofhydrogen atom only 5. 03 Problem Bohar model can explain : a. the solar spectrum b. the spectrum of the hydrogen molecule c. spectrum of any atom or ion containing one electron only d. the spectrum of hydrogen atom only 6. 04 Problem Gamma rays have : a. No mass and no charge b. Mass only c. Charge only d. Mass and charge both 7. 05 Problem Zeeman effect refers to the : a. Splitting up of the lines in an emission spectrum in the presence of anexternal electrostatic field b. Random scattering of light by colloidal particles c. Splitting up of the lines in an emission spectrum d. Emission of electrons from metals when light falls upon them 8. 06 Problem Correct gas equation is :P1T1 P2T2 a. V V21V1T2 V2T1 b. P1 P2P1V1 T1 c.P2V2 T2V1V2 d. P1P2T1T2 9. 07 Problem Which combinations of quantum numbers, n, l, m and s for the electron in an atom does not provide a permissible solution of the wave equation ? 1 a. 3, 2, 1, 2 1 b. 3, 1, 1, - 2 c. 3, 3, 1, - 1 2 d. 3, 2, -2 , 1 2 10. 08 Problem Ca2+ is isoelectronic with : a. Na+ b. Ar c. Mg2+ d. Kr 11. 09 Problem Which element is used for making a transistor ? a. Sn b. Sb c. Si d. Mg 12. 10 Problem The rate constant for a first order reaction whose half-life, is 480 s is : a. 2.88 x 10-3 s-1 b. 2.72 x 103 s-1 c. 1. 44 x 10-3 s-1 d. 1. 44 s-1 13. 11 Problem For the following homogeneous reaction, the unit of rate constant is :kA B C a. mol-1 L s-1 b. s-1 c. s d. s-1 mol L-1 14. 12 Problem A sample of rock from moon contains equal number of atoms of uranium and lead. t1/2 for U = 4.5 x 109 yr. The age of the rock would be : a. 2.25 x 109 yr b. 13.5 x 109 yr c. 9.0 x 109 yr d. 4.5 x 109 yr 15. 13 Problem The half-life period of a radioactive material is 15 min. What per cent of radioactivity of that material will remain after 45 min ? a. 17.5% b. 15 % c. 12.5% d. 10% 16. 14 Problem In terms of energy 1 amu is equal to : a. 100 J b. 931.1 kcal c. 931.1 MeV d. 107 erg 17. 15 Problem A biological catalyst is : a. The N2 molecule b. An enzyme c. An amino acid d. A carbohydrate 18. 16 Problem The action of enzymes in living system is to : a. Supply energy to tissues b. Create immunity c. Circulate oxygen d. Enhance the rate of biochemical reactions 19. 17 Problem Amongst the following, the molecule that is linear is : a. SO2 b. CO2 c. ClO2 d. NO2 20. 18 Problem The hydrogen bond is strongest is : a. F H .. O b. F H .. F c. S H .. S d. O H .. O 21. 19 Problem Dipole moment is shown by : a. cis-1, 2-dichloro ethane b. trans-1, 2-dichloro ethane c. trans-1, 2-dichloro-2-pentene d. both (a) and (c) 22. 20 Problem The compound 1, 2-butadiene has : a. sp, sp2 and sp3 hydridised carbon atoms b. only sp2-hybridised carbon atoms c. only sp-hybridised carbon atoms d. both sp and sp2-hybridised carbon atoms 23. 21 Problem The C H bond distance is the longest in : a. C2H6 b. C2H2 c. C2H2Br2 d. C2H4 24. 22 Problem Which one of the following solutions has the highest B.P. ? a. 0.1 M NaCl b. 0.1 M urea c. 0.1 M BaCl2 d. 0.1 M glucose 25. 23 Problem The freezing point of 1% solution of lead nitrate in water will be : a. 20C b. 10C c. 00C d. below 00C 26. 24 Problem The amount of urea to be dissolved in 500 cc of water (k = 1.860 C) to produce a depression of 0.1860 C in the freezing point in : a. 9 g b. 6 g c. 3 g d. 0.3 g 27. 25 Problem The solubility of AgI in NaI solution is less than that in pure water because : a. The temperature of the solution decreases b. Solubility product of AgI is less than that of NaI c. Of common ion effect d. AgI forms complex with NaI 28. 26 Problem Which is chemically most active non-metal ? a. S b. O2 c. F2 d. N2 29. 27 Problem Which one of the given transition metal ions is diamagnetic ? a. Cu2+ b. Co2+ c. Cr3+ d. Zn2+ 30. 28 Problem Which of the following isoelectronic species has the largest size ? a. Na+ b. O2- c. N3- d. F- 31. 29 Problem Molecular formula of Glaubers salt is : a. Na2SO4 . 10H2O b. FeSO4 . 7H2O c. CuSO4 . 5H2O d. MgSO4 . 7H2O 32. 30 Problem Cyanide process is used for the extraction of : a. Au b. Ag c. Cu d. Both (a) and (b) 33. 31 Problem Which of the following metal is correctly matched with its ore ? MetalOre a. ZincCalamine b. SilverIlmenite c. Magnesium Cassiterite d. Tin Azurite 34. 32 Problem An example of a Lewis acid is : a. MgCl2 b. SnCl4 c. AlCl3 d. NaCl 35. 33 Problem Which solution has pH equal to 10 ? a. 10-4 M KOH b. 10-10 M KOH c. 10-10 M HCl d. 10-4 M HCl 36. 34 Problem Solubility product of BaCl2 is 4 x 10-9 mol/L. Its solubility would be : a. 1 x 10-27 b. 1 x 10-3 c. 1 x 10-7 d. 1 x 10-2 37. 35 Problem Molecular orbital theory was given by : a. Kossel b. Mosley c. Mulliken d. Werner 38. 36 Problem In methane the bond angle is : a. 1800 b. 900 c. 1090 d. 1200 39. 37 Problem Oxidation number of N in N3H (hydrazoic acid) is :1 a. - 3 b. + 3 c. 0 d. - 3 40. 38 Problem Phosphorus has the oxidation state of +3 in : a. Phosphorous acid b. Pyrophosphoric acid c. Orthophosphoric acid d. Metaphosphoric acid 41. 39 Problem Which of the following has highest pH ? a. MKOH4M b.NaOH4 c.M NH4OH 4M d.Ca(OH)24 42. 40 Problem The heat of neutralization of HCl by NaOH is 55.9 kJ/mol, the energy of dissociation of HCN is : a. 43.8 kJ b. -43.8 kJ c. -68 kJ d. 68 kJ 43. 41 Problem Bronze is an alloy of : a. Pb + Sn + Zn b. Cu + Sn c. Pb + Zn d. Cu + Zn 44. 42 Problem In photography we use : a. AgI b. NH3 c. AgCl d. AgBr 45. 43 Problem The treatement of Cu with dilute HNO3 gives : a. N2O b. NO c. NH4+ d. NO2 46. 44 Problem A mixture of camphor and benzoic acid can be separated by : a. Sublimation b. Extraction with a solvent c. Chemical method d. Fractional crystallization 47. 45 Problem The empirical formula of a compound is CH2. One mole of this compound has a mass of 42 g. It molecular formula is : a. C3H6 b. C3H8 c. CH2 d. C2H2 48. 46 Problem How many isomers are possible for the alkane C4H10 ? a. 3 b. 5 c. 2 d. 4 49. 47 Problem Geometircal isomerism is possible in case of : a. pentene 2 b. propane c. pentane d. ethane 50. 48 Problem The Wrong IUPAC name of the compound CH3CHOH. CH2CH3 is : ? a. Butan-2-ol b. 2-butanol c. Butanol-2 d. 1-,ethylopropanol-1 51. 49 Problem The number of isomers of the compound with molecular formula C2H2Br2 is : a. 4 b. 3 c. 5 d. 2 52. 50 Problem The number of ether isomers possible for C4H10O are : a. 2 b. 5 c. 4 d. 3 53. 51 Problem Keto-enol tautomerism is observed in : a. b. c. d. Both (a) and (b) 54. 52 Problem Which of the following compounds will show geometrical isomerism ? a. 1-phenyl propene b. Propene c. 2-methyl-2-butene d. 2-butene 55. 53 Problem The number of primary amines of formula C4H11N is : a. 1 b. 3 c. 4 d. 2 56. 54 Problem Lyophobic colloids are : a. gun proteins b. protective colloids c. irreversible colloids d. reversible colloids 57. 55 Problem White vitriol has the formula : a. CaSO4 . 2H2O b. CuSO4 . 5H2O c. ZnSO4 . 7H2O d. FeSO4. 7H2O 58. 56 Problem The decomposition temperature is maximum for : a. MgCO3 b. SrCO3 c. CaCO3 d. BaCO3 59. 57 Problem What is the molarity of 0.2 N Na2CO3 solution ? a. 0.05 M b. 0.4 M c. 0.1 M d. 0.2 M 60. 58 Problem The strength of 10 cc of 10 volume solution of H2O2 in terms of normality is : a. 6.8 N b. 1.7857 N c. 4.4 N d. 30.35 N 61. 59 Problem Zeolite which shows ion exchanging ability : a. can provide H+ in place of Na+ ions b. is a sodium aluminosilicate c. is an ion-exchange resin d. is a close-packed assemblance of silicon and oxygen atoms 62. 60 Problem Which of the following is an electrophile ? a. Lewis acid b. Lewis base c. Negative species d. None of the above 63. 61 Problem Strongest acid is : a. 2, 4, 6-trinitro phenol b. ethanol c. ether d. phenol 64. 62 Problem Which one of the following species is isoelectronic with ammonia ? a. C H2 b. C H2 c. CH3 d. CH2 65. 63 Problem The addition of HBr is easiest with : a. (CH3)2C = CH2 b. CH3 CH = CH2 c. ClCH = CHCl d. CH2 = CH Cl 66. 64 Problem Dry ice is : a. Solid ice b. Solid CO2 c. Solid NH2 d. Solid CH4 67. 65 Problem When potassium ferrocyandie crystals are heated with conc. Sulphuric acid, the gas evolved is : a. Sulphur dioxide b. Ammonia c. Carbon monoxide d. Carbondioxide 68. 66 Problem Potassium cyanide is obtained from : a. K4[Fe(CN)6] b. K3[Fe(CN)6] c. K3[Fe(CN)4] d. None of the above 69. 67 Problem Ammonia on reaction with hypochlorite anion can form : a. NO b. N2H4 c. NH4Cl d. Both a and c 70. 68 Problem On heating sodium acetate with sodium hydroxide, the gas evolved will be : a. Ethylene b. Methane c. Acetylene d. Ethane 71. 69 Problem Calcium carbide when treated with water gives : a. Ethylene b. Methane c. Acetylene d. Ethane 72. 70 Problem Natural gas is a mixture of : a. CH4 + C2H6 + C3H8 b. CO + H2 + CH4 c. CO + H2 d. H2O + CO2 73. 71 Problem At 1300C, normal butane reacts with bromine, the product will be : a. b. c. d. All of the above 74. 72 Problem HOCl reacts on 3-methyl-2-pentene, the main product will be : a. b. c. d. None of the above 75. 73 Problem An alkyne has the general formula : a. CnH2n b. CnH2n+1 c. CnH2n+2 d. CnH2n-2 76. 74 Problem In the reaction CH3 C C Na (CH3 )2 CH Cl ? The product formed is : a. Propene b. Propyne c. Propyne and propene d. 4-methyl pentyen-2 77. 75 Problem Which of the following metal ions is not coloured ? a. Ti3+ b. Fe3+ c. V2+ d. Cu+ 78. 76 Problem Which has maximum paramagnetic nature ? a. [Mn(H2O)6]2+ b. [Cu(NH3)4]2+ c. [Fe(CN)6]4- d. [Cu(H2O)4]2+ 79. 77 Problem Lucas test is done to differentiate between : a. Alcohol and ketone b. Alcohol and aromatic ketones c. 10, 20 and 30 alcohols d. none of that above 80. 78 Problem Phenol is more acidic than alcohol. Why ? a. Phenol is more stable than water b. Phenol is aromatic and alcohol is aliphatic c. phenol is resonance stabilized d. None of the above 81. 79 Problem Aldehyde and ketones are distinguished by which of the following test ? a. Lucas test b. Tollens test c. KMnO4 solution (Baryers test) d. None of the above 82. 80 Problem Aldehydes and ketones are generally reduced by : a. Clemmensen reduction b. H2S c. H2/Ni d. None of the above 83. 81 Problem Which one gives positive iodoform test ? a. (CH3)2CHCH2OH b. C6H5-OH c. d. CH3CH2OH 84. 82 Problem What is the meaning of o/p directing group ? a. A group which increases the electron density at m-position b. No reaction occur at o/p position c. A group which increases the electron density at o/p positions when attachedto benzene ring and direct the electrophile to this site d. None of the above 85. 83 Problem CH3COOH A CH3COCl. What is A ? a. PCl5 b. Cl2 c. HCl d. COCl 86. 84 Problem Cyclohexene on reaction with cold alkaline KMnO4 form : a. trans-hexanediol b. hexadiketone c. cis-hexanediol d. none of these 87. 85 Problem CH3 CH = CH CH3 on ozonolysis give : a. O2 b. CH3 CH2 OH c. CH3 CO CH3 d. CH3 CHO 88. 86 Problem Which is monosaccharide ? a. Sucrose b. Lactose c. Fructose d. None of these 89. 87 Problem In which reaction C = O can be reduced to CH2 ? a. Wolff-Kishner reaction b. Reimer-Tiemann reaction c. Wurtz reaction d. None of the above 90. 88 Problem Phenol on reaction with Zn dust from : a. ZnO + benzene b. Toluene c. Benzaldehyde d. Benzoic acid 91. 89 Problem Phenol on reaction with chloroform and aqueous KOH form a major product : a. b. c. d. 92. 90 Problem Resonance energy of benzene represents : a. Stability of benzene b. Energy required to break C C bond c. Energy required to break C H bond d. Energy for 93. 91 Problem Two structures of cyclohexatriene given by Kekule represent : a. An equilibrium mixture of two cyclohexatriene b. An equal mixture of two isomer c. A structure which has some resemblence with benzene structure d. None of the above 94. 92 Problem In Ni(CO)4 Oxidation number of Ni is : a. 4 b. -4 c. 0 d. + 2 95. 93 Problem Ethyl acetate on reaction whit Grignards reagent, forms : a. Alcohol b. Ketone c. Methane d. Ethane 96. 94 Problem LPG mainly contains : a. ethyne b. butane c. Methane d. Ethane 97. 95 Problem K4[Fe(CN)6] is a : a. Doublet salt b. Complex compound c. Acid d. Base 98. 96 Problem Write the following in decreasing order towards electrophilic substitution reaction : (i) benzene (ii) Chlorobenzene (iii) nitrobenzene (iv) toluene a. i > ii > iii > iv b. iv > i > ii > iii c. ii > iii > iv > i d. ii > i > iv > iii 99. 97 Problem IUPAC name of CH3 CH = CH C CH is : a. pent 2-ene 4-yne b. pent-1-yne-3-ene c. pent-3-ene-1-yne d. none of the above 100. 98 Problem name of the following compound is : a. 2-ethyl butanol-2 b. 1-ethyl, 1-mehtyl propanol-1 c. 3-methyl pentanol-3 d. diethyl ethanol 101. 99 Problem Number of unpaired electron in Ni2+ (28) is : a. 4 b. 2 c. 6 d. 8 102. 100 ProblemWhich of the following have polyamide structure ?a. Bakeliteb. Nylon-6,6c. PVCd. None of these 103. FOR SOLUTIONS VISIT WWW.VASISTA.NET