Chem Xi Fb Mcqs & Short q

8/15/2019 Chem Xi Fb Mcqs & Short q

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BASIC CONCEPTS

Chapter # 1

MCQs

1. Number of isotopes of cadmium are _____________________.

a) 6 b) 3c) 9d) 11

2. One atomic mass unit (amu) is equal to __________________.

a) 6.02 x 1023 ! b) 2 x 10"10 !c) 1.6# x 10"2$ !d) 1.66 x 10"2# !

3. %f t&e empirical formula of a compound is '1912 N2O and molecular mass is 1#6!.&at *ill be its molecular formula.

a) '202$ N$O2 b) '1012 N2Oc) '+6 N2Od) '3036 N3O3

$. ,ccordin! to t&e relation m-e 2r 2-2/ if e is increased b eepin! constantr4 *ill ___________________.

a) 5ecrease b) %ncreasec) ecome 7erod) 8emain same

+. mallest particle of an element *&ic& ma or ma not &a:e an independentexistence is called.

a) , ;olecule b) ,n ion

c) ,n atomd) ,n electron

6. &en an electron is added to a unipositi:e ion *e !et.

a) anion b) 'ationc) Neutral atomd) ;olecule


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#. 8elati:e atomic mass is t&e mass of an atom of an element as compared to t&emass of.

a) Ox!en b) dro!enc) eliumd) 'arbon


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a) ,mount of limitin! reactant b) ,mount of reactant in excessc) ,mount of product formedd) ,mount of reactant left unused.

1$. =&e a:a!edro4s number is

a) 6.02 x 10"2$

b) 6.02 x 102$

c) 6.02 x 1023

d) 6.02 x 10"23

1+. =&e electron microscope can measure t&e si7e of an ob?ect abo:e.

a) 1000 nm b) +00 nmc) 200 nmd) $00 nm

16. _______________isotopes occure in nature.a) 2


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20. @ormation of ne!ati:e ion is a tpe of reaction.

a) /xot&ermic b) /ndot&ermicc) ,diabaticd) %sot&ermal

21. >ercenta!e (A) of ox!en in 2O is

a)


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2#. 1 dm3 :olume is equal to

a) 100 cm3

b) 2+0 cm3

c) +00 cm3

d) 1000 cm3

2a) 2 x 6.023 x 1023 6.023 x 1023

b) 6.023 x 1023 6.023 x 1023

c) 2 x 6.023 x 1023 2 x 6.023 x 1023

d) 6.023 x 1023 2 x 6.023 x 1023

29. 1 !ram unit of sulfate (O$2") isC

a) 9

30. 8elati:e atomic mass of ox!en isC

a) 1$.#


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$6. ;an elements &a:e fractional atomic masses. =&is is because.a) =&e mass of t&e atom is itself fractional b) ,tomic masses are a:era!e masses of isobarsc) ,tomic masses are a:era!e masses of isotopesd) ,tomic masses are a:era!e masses of isotopes proportional to t&eir

relati:e abundance$#. ,n anion al*as contains.

a) Freater number of proton t&an neutron b) Freater number of electron t&an neutronc) Freater number of neutron t&an protond) Freater number of electron t&en proton

$&osp&orousc) 'arbon d) elium

$9. ;olecular ions can be produced b bombardin! a !as *it& &i!& ener!.a) /lectron beam b) H"rasc) I"particles d) eit&er a4 or c4

+0. =&e number of atoms present in a molecules determine its.

a) ;olecularit b) asicitc) ,cidit d) ,tomicit


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BASIC CONCEPTS

Chapter # 1

ANSWERS

1. (c ) 2. (d )3. (b ) $. (b )

+. (c ) 6. (c )

#. (d )


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BASIC CONCEPTS

Chapter # 1

SHORT NOTES

1. One mole of different compounds &a:e different masses but some number ofmolecules. &E

2. o* man molecules of *ater are in 12! of iceE

3. 5efine atomicit.

$. 5efine stoic&iometr.

+. & isotopes s&o* same c&emical properties but different p&sical properties.

6. &at is fractional atomic massE

#. , limitin! reactant controls t&e quantities of products in a c&emical reactionE


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2#. =&e addition of electron to a ne!ati:e species is al*as endot&ermic. /xplain.

2


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EXPERIMENTAL TECHNIQUES

CH # 2

MCQs

1. =&e rate of filtration t&rou!& a conical funnel can be increased b usin! aM

a) lar!e filter paper b) fluted filter paperc) small filter paperd) porous filter paper

2. Fooc&e crucible is made up of

a) Flass b) >lasticc) >orcelain

d) 'opper metal

3. =&e process in *&ic& t&e solid *&en &eated c&an!es directl into :apors is called

a) 'rstalli7ation b) ublimationc) '&romato!rap&d) ol:ent extraction

$. ol:ent extraction follo*s t&e

a) conser:ation la* b) definite proportions la*c) ?oules la*d) 5istribution la*

+. e:eral tpes of filter media are used for filtration dependin! on.

a) Nature of reactants b) Nature of reactionc) Nature of precipitated) Nature of filter paper.

6. @iltration b a !lass funnel and filter paper is :er.

a) =ime consumin! b) 5ifficultc) @astd) ,ccurate

#. 8ate of filtration t&rou!& conical funnel can be considerabl increased b usin!


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a) @ine filter paper b) Ordinar filter paperc) @luted filter paperd) Gnder suction crucible.


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c) , stationar p&ase and mobile p&ased) =*o stationar and t*o mobile p&ases

1$. '&romato!rap& in *&ic& stationar p&ase is a solid is called.

a) >artition c&romato!rap& b) >aper c&romato!rap&

c) i!& pressured) ,dsorption c&romato!rap&

1+. '&romato!rap& in *&ic& stationar p&ase is a liquid is called.

a) >artition c&romato!rap& b) >aper c&romato!rap&c) 'olumn c&romato!rap&d) ,dsorption c&romato!rap&

16. , c&emist concerns in quantitati:e analsis *it&

a) 5etermination of relati:e atomic mass b) 5etermination of A puritc) 5etermination of empirical formulad) ,ll abo:e

1#. ol:ent extraction is an equilibrium process and it is controlled b t&e

a) Da* of mass action b) ,mount of sol:ent usedc) 5istribution la*

d) =&e amount of solute1


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d) %f t&e paper fits ti!&tl.20. asic principle of crstalli7ation is t&at solute s&ould be soluble in a suitable

sol:ent atC

a) i!& temperature

b) 8oom temperaturec) i!& temperatured) Do* temperature.

21. >remature crstalli7ation of solute on filter paper or in funnel can be a:oidedC

a) @ilterin! &ot saturated solution usin! &ot funnel. b) @ilterin! *arm solutionc) uic filtration.d) @ilterin! cold solution.

22. 8epeated extraction usin! small portions of sol:ent are moreCa) /fficient b) ,ccuratec) lo*d) 8apid

23. =o ac&ie:e a !ood separation t&e t*o liquids are !entl s&aen to increase t&eirarea of

a) ;iscibilit b) eparation

c) 'ontactd) olubilit

2$. '&romato!rap& in:ol:es t&e distribution of a solute bet*een.

a) =*o stationar p&ases b) =*o mobile p&asesc) , stationar p&ase and mobile p&asesd) =*o stationar and t*o mobile p&ases.


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2+. '&romato!rap& in *&ic& stationar p&ase is a solid is called

a) >arties c&romato!rap& b) >aper c&romato!rap&c) i!& pressure c&romato!rap&.d) ,dsorption '&romato!rap&

26. '&romato!rap& in *&ic& stationar p&ase is a liquid is calleda) >artition c&romato!rap& b) >aper c&romato!rap&c) 'olumn c&romato!rap&d) ,dsorption c&romato!rap&

2#. %n paper c&romato!rap& t&e rate at *&ic& solute mo:e depend onC

a) 5istribution coefficients b) 5istribution coefficientsc) Da* of partial pressure

d) Da* of specific proposition2


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a) ,sbestos mat b) andc) Flass d) >aper pulp

33. &ic& one of t&e follo*in! is not t&e disad:anta!es of drin! crstals b pressin! bet*een se:eral folders of filter paperE

a) 'rstals are 'rus&ed to a fine po*der. b) ometimes t&e fibers of filter paper contaminate t&e product.c) ometimes t&e crstals bein! stic in nature !et ad&ered *it& filter

papers t&us lo*erin! t&e Aa!e ield of t&e crstalli7ed substanced) %t is a most suitable and reliable process.

3$. ol:ent extraction is an equilibrium process and is controlled b

a) Da* of mass action b) =&e amount of sol:ent used.c) 5istribution la* d) =&e amount of solute.

3+. &ic& one of t&e follo*in! action *ill increase t&e efficienc of sol:entextraction tec&niquesE

a) 8epeated extraction usin! small portions of t&e sol:ent. b) One extraction usin! lar!er :olume of sol:ent.c) 8epeated extraction usin! lar!er portions of t&e sol:ent.d) One extraction usin! smaller :olume of sol:ent

36. %n sublimation process t&e substance *&ic& is taen in a *atc& !lass co:ered *it&an in:erted funnel is &eated slo*l.

a) O:er a *ater bat& b) O:er an oil bat&c) O:er a sand bat& d) O:er a sulp&uric acid


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CH # 2

MCQs

ANSWERS

1. (b) 2. (c)

3. (b) $. (d)

+. (c) 6. (a)

#. (c)


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CH # 2

SHORT QUESTIONS

.1. &at is t&e basic difference in t&e quantitati:e and qualitati:e ,nalsisE

.2. Name some common sol:ents for crstalli7ation.

.3. o* coolin! is done to separate crstals.

.$. &at drin! a!ents are used in :accum desiccatorsE

.+. o* undesired colors are separated from crstalsE

.6. & solid iodine is directl con:erted into :apoursE

.#. tate distribution la*.

.


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.2


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CHAPTER – 3

ASES

MCQ!s

1. ,t &i!& temperature isot&erm mo:es a*a from bot& t&e axes because of increasein

a) >ressure b) olumec) No of molesd) a B b

2. alues of '&arles la* constant () depends upon

a) ;ass of !as b) >ressure of !asc) No of moles of !asd) ,ll abo:e

3. %f pressure remains constant at *&ic& temperature t&e :olume of an ideal !as isdouble as compared to :olume at Oo'

a) "2#3o' b) 2#3 c) 2#3o'd) +$6o'

$. /qual :olumes of &dro!en and &elium are inserted in t&e same :essel. =&e pressure exerted b 2 and e are is t&e ratio of

a) 1 M 1 b) 2 M 1c) 1 M 2d) ,ll abo:e

+. &ic& of t&e follo*in! &a:e same no of molecules at =>

a) 100 cm3 eac& of N2$ and O2 b) 200 cm3 eac& of 'O2 and N2Oc) +0 cm3 eac& 'O and N2d) ,ll of abo:e

6. %f absolute temperature is doubled and t&e pressure is increased $ times t&e:olume is

a) alf b) 5oublec) @our timesd) 8emains t&e c&an!ed


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#. =&e densit is usuall expressed as

a) !m"3 b) !dm"3c) !dm3d) ! cm3


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13. , small space craft of capacit 10m3 is connected to anot&er of capacit 30m3. before connection t&e pressure inside t&e smaller craft is +0 pa and t&at insidet&e lar!er is 100 pa. %f all measurements are made at t&e same temperature.&at is t&e pressure in t&e combined arran!ement after connectionE

a) #+ >a b) a

c) 100 >ad) 12+ >a

1$. ;ost ideal !as at room temp isa) 'O2 b) N3c) O2d) N2

1+. =&e !as constant 8 can be represented in terms of atm mole litre and o asM

a) (1mol) (2#3.1+)-(1atm)(22.$1$ liters) b) (1atm)(2#3.1+)-(1mol)(22.$1$ liters)c) (1atm)(22.$1$ liters)-(1mol)(2#3.1+)d) (22.$1$ liters)(2#3.1+)-(1mol)(1atm)

16. =&e lo*est possible temperature a !as ma ac&ie:e in t&e !aseous state oncoolin! is _ o'

a) 7ero b) "2#3c) "2#3.1+

d) "2001#. 8espiration process in &umans is due toC

a) 5ifference in partial pressure of !ases b) >artial pressure of O2 is !reater outside t&an in lun!sc) >artial pressure of 'O2 is lesser in air t&an in lun!sd) ,ll of t&e abo:e

1


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19. >ressure remainin! constant at *&ic& temperature t&e :olume of a !as *ill become t*ice of *&at it is at 0o'.

a) +$6 ' b) 200 'c) +$6 d) 2#3

20. /qual masses of met&ane and ox!en are mixed in an empt container at 2+o'.=&e fraction of total pressure exerted b ox!en is

a) P b)


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c) >=-8d) 8->=

26. Fases de:iate from ideal be&a:iour at &i!& pressure. &ic& of t&e follo*in! iscorrect for non"idealitE

a) at &i!& pressure t&e !as molecules mo:e in one direction onl. b) ,t &i!& pressure t&e collisions bet*een t&e molecules are increased

manifold.c) ,t &i!& pressure t&e :olume of t&e !as becomes si!nificant.d) ,t &i!& pressure t&e intermolecular attraction become si!nificant.

2#. =&e de:iation of a !as from ideal be&a:iour is maximum atC

a) "10 o' and +.0 atm b) "10 o' and 2.0 atmc) 100 o' and 2.0 atmd) 0o' and 2.0 atm

2


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33. &at t&e &elp of Voule"=&omson effect *e can ac&ie:e.a) i!& temp b) i!& pressure b) Do* temp d) Do* pressure

3$. &at is t&e unit of excluded or effecti:e :olume. %n .%E

a) m mol"1

b) cm3

mol"

c) m3 mol"1 d) dm3 mol"

3+. >artial pressure of ox!en is &i!&er in one of t&e follo*in!.

a) ,lr b) loodc) Dun! d) None

36. 5r ice is solid

a) O2 b) 'O2

c) 'O d) O2

3#. =&e molar :olume of 'O2 is ;aximum at.

a) .=.> (O0' and 1atm) b) 12#0' and 1atmc) O0' and 2atm d) 9#30' and 2atm

31 2.+atm >2 2atm =2 2#3 2 E &at *ill bet&e :olume of t&e !asE

a) 11 dm3 b) 12 dm3

c) 10 dm3 d) 12.+ dm3

$0. Dinde4s met&od is based on

a) =ndll effect b) Voule"=&omson effectc) tar4 effect d) None of t&e !i:en


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CHAPTER – 3

ASES

MCQ!s

ANSWERS

1. d 2. d

3. c $. a

+. d 6. a

#. b


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ASES

CHAPTER – 3

SHORT QUESTIONS

.1. &at is Voule" =&omsan /ffectE

.2. ,t &i!& attitudes t&e pilots &a:e uncomfortable breat&in! *&E.3. Fases liquef at lo* temperature and &i!& pressureE

.$. 8eal !as de:iates from t&e ideal be&a:ior at lo* temperatureE

.+. , !as occupies 100 dm3 at 10o'. &at *ill be its :olume at "2#3 o'E

.6. 5ifferentiate b-* diffusion and effusion of a !asE

.#. dro!en !as diffuses faster t&an 'O2E

.


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.2+. riefl *rite about ole4s la*E

.26. &ic& factor is called compressibilit factorE

.2#. o* electric current is con:erted into li!&t in fluorescent lampE

.2.

.3$ &ic& unit of pressure is used b meteorolo!istsE.3+. o* >: n8= can be explainedE

.36. &ic& factors of effect t&e critical temperatureE


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CHAPTER – "

LIQUIS AN SOLIS

MCQs

1. =&e attracti:e forces *it&in molecules is t&an intermolecular forces in 'l arecalled

a) ;uc& *eaer b) eaer c) tron!d) tron!est

2 =&e intermolecular forces in 'l are called

a) ionic forces b) eaerc) ander *aals forcesd) dro!en bondin!

3. tren!t& of dipole dipole interaction depends upon t&e difference of

a) . / b) /. Nc) /. ,d) %. >

$. =&e forces *&ic& are :er s&ort li:ed

a) Dondon forces b) 5ipole L 5ipole interactionc) dro!en bondin!d) 5ipole induced dipole

+. Dondon forces are present in molecules

a) >olar b) None polar c) Noble !asesd) ,ll

6. Number of lone pairs in ox!en

a) One b) =*oc) =&reed) @our


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#. tren!t& of a &dro!en bond is __________ times lesser t&an co:alent bond.

a) One b) =enc) =*entd) =&irt


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1$. =&e simplest unit cell is

a) 'ubic b) =etra!onalc) ;onoclinicd) =riclinic

1+. Frap&ite &as _____________ !eometra) exa!onal b) 8&ombo&edralc) =riclinicd) None

16. =&ere are _______________ parameters of a unit cell

a) @our b) @i:ec) ix

d) e:en1#. , temperature at *&ic& bot& crstalline forms of a substance coexist at a

temperature is called

a) ,bsolute b) =ransitionc) Gpper consulated) el:in

1


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21. alues of &eat of :apori7ation for liquids *it& stron! dipole L dipole force *ill be

a) er &i!& b) er lo*c) 8easonabl &i!&d) Ne!li!ible

22. %nstantaneous dipole induced dipole force is also calleda) 5ebe force b) Dondon dispersion forcesc) ander *aals forced) bondin!

23. 5o*n t&e !roup polari7ibilit !enerall

a) %ncrease b) 5ecreases

c) 8emains constantd) 5o not follo* a re!ular trend

2$. =rend of boilin! point of &alo!en from c&lorine to iodine is t&at it

a) 5ecreases b) %ncreasesc) 8emains constantd) Ne!li!ible

2+. ;olecules of &drocarbons *it& lar!e c&ain len!t&s experience

a) 8epulsi:e forces b) tron! attracti:e forcec) ea attracti:e forcesd) No attracti:e force

26. drocarbons *&ic& !enerall &a:e &i!& molecular masses exist in

a) olid form b) Diquid formc) apour formd) Faseous form

2#. /xceptionall lo* acidic stren!t& of @ is due to

a) tron! polar bond b-* @ b) maller si7e of fluorinec) tron! "bondin!d) /lectro ne!ati:it of fluorine


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2


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3+. 5istillation under :er reduced pressure is called

a) @ractional distillation b) 5istillationc) acuum destructi:e distillationd) 5estructi:e distillation

36. ater ma boil at 120o

' *&en external pressure isa) #60 mm of ! b) 100 mm of !c) 1$


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$1. & is t&e b.p of met&ane !reater t&an t&at of neon

a) , molecule of met&ane &as a !reater mass t&an a molecule of neon b) , molecule of met&ane &as more electrons t&an a molecule of neonc) ;olecules of met&ane &a:e stron!er inter molecules forces t&an t&ose of

neon.d) =&e molecule of met&ane is polar but t&an of neon is not .

$2. &ic& of t&e follo*in! elements in its crstalline form *ill &a:e t&e lo*estent&alp c&an!e of :apori7ation.

a) '&lorine b) ,r!onc) >&os p&orusd) ilicon

$3. 'rstals s&o* :ariation in p&sical properties dependin! upon t&e direction. =&is propert is called.

a) %somorp&ism b) >olmorp&ismc) ,nisotropd) %sotrop

$$. 'ertain solid melt into a turbid liquid p&ase *it& properties of liquids of liquids as*ell as some de!ree of order lie solid suc& turbid liquids are called.

a) ,morp&ous solid b) itreous solid

c) 'rstalline solidd) Diquid crstal

$+. %somorp&ic crstals s&o*

a) ame c&emical properties b) ame p&sical propertiesc) ame crstalline formd) ame meltin! point

$6. /xistence of an element in more t&an one form is no*n as

a) ,llotrop b) %somorp&ismc) %sotropd) Non of t&ese


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$#. 'rstalline forms of t&e same substance can coexist in equilibrium *it& eac&ot&er at its

a) ;eltin! point b) =ransition temperaturec) oilin! pointd) None of t&ese

$


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+$. &ic& of t&e follo*in! pair is isomorp&s.

Na@ ;!'O3 Na'l r 'a'O3 'a'l2 Na2'O3 'l

++. &ic& of t&e follo*in! is a pseudo solid.'a@2 Na'lFlass,ll

+6. , liquid crstal is

%sotropic,nisotropic

ot& JaK and JbK None

+#. @orce of attraction bet*een 2 molecules isM

5ipole L dipole forces%on"dipole forces5ipole L induced forcesDondon forces

+


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CHAPTER – "

LIQUIS AN SOLIS ANSWERS

1. c 2. c

3. b $. a+. b 6. b

#. c


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CHAPTER – "

LIQUIS AN SOLIS

SHORT QUESTIONS

.1 oilin! point of *ater is &i!&er t&an t&at of @.&.

.2 %ce occupies more space and its densit decreasesexplain.

.3 apour pressure and boilin! point increases *it& increase in external pressureE

.$ eat of sublimation of a substance is al*as !reater t&an t&at of eat of

:apourisation*&E

.+ team produces more se:ere burns t&an boilin! *aterE

.6 ater ept in eart&en *are ?ars eeps coolerE

.# 5ifferentiate bet*een %somorp&ism and >olmorp&ism.

.< &at is t&e relation bet*een >olmorp&ism and ,llotrop..9 & et&l alco&ol is soluble in *ater but met&ane is notE

.10 ater forms conca:e meniscus but mercur forms con:ex meniscusE

.11 >ressure cooer &elps in cooin! t&e meat and :e!etables quicl e:en at &i!&er

altitudesE

.12 ill *ater e:aporate *&en t&e &umidit is 100AE

.13 ;etallic crstals are !ood conductors of electricit but ionic crstals are notE

.1$ &at is anisotropE.1+ &at is t&e difference bet*een e:aporation and boilin! E

.16 5oes liquid temperature rise after reac&in! boilin! point and *&E

.1# 5efine clea:a!e plane.

.1< &at is t&e &abit of a crstalE

.19 =ransition temperature is ex&ibited b bot& elements and compoundsE

.20 5efine unit cell.

.21 X: of *ater is $0.6 ?-mol *&ile for '3< it is 16.9 ?-molexplain.

.22 &at is t&e effect of dipole"dipole forces on t&ermodnamic parametersE

.23 'o:alent crstals are :er &ard but molecular crstals are :er softE

.2$ eat of :apori7ation of '26 is !reater t&an '$E

.2+ &at does t&e term Dattice ener! meanE

.26 apour pressure of et&er is !reater t&an alco&ol as *ell as *ater at t&e same

temperatureE


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.2# & molecules *it& a lar!er c&ain len!t& experience stron!er attracti:e forcesE

.2< /xplain >respiration is a Fod4s !iftE

.29 5o t&e turbid liquids posses some de!ree of ordernessE

.30 5ensit of a liquid decreases *it& t&e increase in temperatureE

.31. ,fter t&e boilin! point t&e temperature of t&e liquid does not c&an!e t&ou!& &eat

is bein! continuousl supplied. /xplain *&E .32. &at tpe of %ntermoleculor forces are present bet*een polar and a non"polar

molecule and &o* polarit is inducedE

.33. %somorp&s &a:e same c&emical properties but t&e &a:e different >&sical

properties. /xplain &E

.3$. &at is t&e coordination number of t&e cation in Na'l and 's'l.

.3+. o* ou can identif a crstal sstemE

.36. &at are crstallo!rap&ic elements of a Gnit cellE.3#. %odine dissol:es readil in telrac&loromet&ane

.3


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STRUCTURE O$ ATOM

Chapter – %

MCQ!s

1. &ic& of t&e follo*in! statement is incorrectE

a) ;o:in! c&ar!ed >articles are deflected b electric field. b) ;o:in! c&ar!ed >ar c) ticles are deflected b ma!netic field.d) /lectric current is mo:ement of c&ar!ed >articles in a conductor.e) None of t&ese.

2. ;o:in! c&ar!e particles are not :isible but t&eir presence and direction can bedetected *it& t&e &elp of.

a) , spectro >&otometer. b) , p&oto!rap&ic film or fluorescent material.c) , mo:in! camerad) None of t&ese.

3. =&e force of attraction or repulsion bet*een t*o c&ar!ed particles can bedetermined b usin!.

a) Fa"Dussac4s la*. b) ,:o!adro4s la*.c) 'oulomb4s la*.d) None of t&ese.

$. &ic& of t&e follo*in! statement is correctE

a) , cat&ode ra tube is used to stud electric disc&ar!e t&rou!& !as at lo* pressure.

b) , !as disc&ar!e tube containin! neon !as at lo* pressure is called neonsi!n.

c) , s&arp beam of radiation can be obtained b passin! mo:in! particlest&rou!& a small slit.

d) a b and c.

+. =&e '&ar!e on an electron is equal to

a) 1.#+


42/95

6. =&e c&ar!e to mass (e-m) ratio of an electron *as first determined b

a) 8 , ;illien in 1909. b) V. V =&omson in 1errin in 1


43/95

13. H"8as are *ea ioni7ers of !ases due to

a) Do* mass of H"ras. b) ein! neutral in naturec) ein! more ener!eticd) ein! slo* in :elocit

1$. @requenc &as a relation to t&e *a:e len!t& t&at can be stated asa) @requenc increase *it& increase in *a:e len!t&. b) @requenc &as no dependence on *a:e len!t&.c) @requenc increase *it& decrease in *a:e len!t&.d) @requenc ma up to do*n *it& *a:e len!t&.

1+. &ic& of t&e follo*in! statement is correctE

a) =&e ener! of x"ras depends upon t&e nature of material used as anode int&e x"ras tube.

b) =&e frequenc of t&e emitted x"ras increase *it& t&e increase in Bi:ec&ar!e on t&e tar!et nuclei.c) =&e atom mass of an element s&o*s t&e number of Bi:e c&ar!e in t&e

nucleus of t&e atom of t&at element.d) None of t&e abo:e.

16. ,n experimental e:idence t&at e:er atom &as a tin nucleus *&ere all t&e massand c&ar!e is concentrated *as pro:ided b

a) ;osle b) . ' 8oent!en

c) 8ut&er fordd) None of t&e abo:e

1#. &en li!&t is passed t&rou!& a prism it spreads into different colours in t&is processC li!&t of lon!er Z is bent.

a) =o a smallest de!ree t&an t&at of s&orter Z. b) =o !reater extent t&an t&at of s&orter Z..c) =o t&e same extent as t&at of s&orter Z..d) =o 7ero de!ree.

1


44/95

19. a:e number (:) &as a relations&ip *it& t&e *a:e len!t& t&at can be stated as

a) a:e number increase *it& increase in Z b) decreases *it& increase in Zc) is independent of Zd) ma increase or decrease *it& Z

20. &ic& statement is correctEa) ,bsorption spectrum is c&aracteristic of a substance. b) /mission spectrum is c&aracteristic of a substance.c) Neit&er absorption nor emission spectrum is c&aracteristics and substance.d) ot& absorption and emission spectra are c&aracteristic of t&e substance.

21. =&e ener! of an electron mo:in! round t&e nucleus depends upon

a) ;ass of t&e electron b) elocit and mass of t&e electron

c) ;omentum of t&e electrond) =&e principle quantum number of t&e electron

22. &ic& statement is correctE

a) =&e lonel e of &dro!en atom is in t&e !round state *&en n 1 b) =&e !round state represents t&e lo*est ener! state.c) ot& , and d) None of t&e abo:e.

23. ,n electron mo:in! in an orbit around t&e nucleus possesses.

a) Onl inetic ener! due to its motion. b) Onl potential ener! due to its interaction *it& t&e nucleus.c) ot& inetic and potential ener!.d) None of t&e abo:e

2$. &ic& statement is correctE

a) ,n e absorbs ener! *&en it ?umps from lo*er orbital to &i!&er orbital. b) ,n e emits ener! *&en ?umps from &i!&er orbital to lo*er orbital.c) ot& a and bd) Neit&er a nor b

2+. ,n e mo:ies around t&e nucleus in a circular pat& due to

a) , centripetal force actin! on t&e e b) 'olumbic force of attraction bet*een t&e Bi:e ec) ot& a and bd) Neit&er a nor b


45/95

26. &ic& statement is correctE

a) e can not be certain about t&e position and momentum of an electronsimultaneousl.

b) e can onl no* about t&e probable position of an electron in an orbit.c) , and d) None of t&e abo:e

2#. =&e possibilit of findin! an electron around a nucleus is suc& t&at.

a) ,n e of an ener! can be found an *&ere around t&e nucleus. b) /lectrons of different ener! are liel to be found in deferent re!ions.c) /lectron existin! an *&ere around t&e nucleus &as equal ener!.d) , and ' are correct

2


46/95

33. o&r4s model is contradicted bC

a) >lan quantum t&eor b) >auli4s exclusion principlec) eisenber!4s uncertaint principled) ,ll of t&e abo:e

number of de!enerate orbital in d orbital isa) 3 b) $c) +d) 6

3$. /ner! associated *it& t&e electron re:ol:in! in 3rd orbital of atom is _ ?-mole

a) "1$+.92 b) "1$


47/95

39. One amu is equi:alent toC

a) 9313 e: b) 931 e:c) 931 ;e:d) 9.31 ;e:

$0. =&e mass number of an element is $0 and atomic number 20. t&e ratio of neutronsto protons isM

a) 1 M 1 b) 1 M 2c) 2 M 1d) None of t&e abo:e


48/95

STRUCTURE O$ ATOM

Chapter – %

MCQ!s

ANSWERS

1. d 2. b

3. c $. d

+. b 6. b

#. a


49/95

STRUCTURE O$ ATOM

Chapter – %

SHORT QUESTIONS

.1. o* are ["ras producedE

.2. &et&er t&e !as in disc&ar!e tube &as an effect as anode ras or it is t&e

electrodeE

.3. o* t&e balmer series of lines are produced in &dro!en spectrumE

.$. 5escribe atomic absorption spectrumE

.+. &at is *a:e numberE

.6. &ic& concept *as re?ected b t&e experiment of 8ut&erfordE

.#. 'at&ode ras produce s&ado* of an opaque ob?ect placed in t&eir pat&E

.


50/95

.30. &at *ill be t&e position of electron *&en nBZ :alue is same for t*o orbitalsE

.31. 5iscuss t&e ener! of orbitalsE

.32. &at do ou no* about t&e positions or t&e *a:elen!t& of lines appearin! is

bot& emission and absorp&ias spectra of an elementE

.33. &at are fast neutronsE &e t&e are not used in fission reactionsE

.3$. &at are slo* neutronsE &at is t&eir importasnce.3+. 'at&ode ras are of onl one tpe *&ile positi:e ras are of man tpes. /xplain.

.36. 'at&ode ras cost s&ado* *&en an opaque ob?ect is placed in t&eir pat&. /xplain.


51/95

CHEMICAL BONIN

Chapter # &

1. ,n ionic compound ,B" is most liel to be formed *&en

(a) =&e ioni7ation ener! of , is &i!& and electron affinit of is lo*.

(b) =&e ioni7ation ener! of , is lo* and electron affinit of is &i!&.(c) ot& t&e ioni7ation ener! of , and electron affinit of are &i!&.(d) ot& t&e ioni7ation ener! of , and electron affinit of is lo*.

2. &ic& of t&e &dro!en &alides &as t&e &i!&est percenta!e of ionic c&aracterE

(a) @(b) r (c) 'l(d) l

3. @or *&ic& of t&e follo*in! compounds &bridi7ation and />8 concepts predict t&e same structure.

(a) '$(b) N3(c) 2O(d) None

$. &ic& one of t&e follo*in! molecules is linearE

(a) 'O2

(b) N3(c) '$(d) 2O

+. &ic& one of t&e follo*in! &as an ionic bondE

(a) 'l(b) ''l$(c) 's@(d) 2O

6. >i"bond is found in t&e structure of(a) N3(b) 2O(c) '$(d) O2


52/95

#. &at &brid form of carbon is belie:ed to ex&ibit in acetlene '22E

(a) sp(b) sp2

(c) sp3

(d) dsp3

ramidal(d) =ri!onal planar

12. =&e s&ape of @3 molecule is

(a) Dinear (b) =etra&edral(c) >ramidal(d) =ri!onal planar

13. %n N3 molecule central atom nitro!en &as

(a) =*o lone pairs and t*o bond pairs(b) =&ree bond pairs and one lone pair (c) @our bond pairs(d) One bond pair and t&ree lone pairs


53/95

1$. alence bond t&eor is unable to explain

(a) parama!netism of O2 molecule(b) s&ape of 2O molecule(c) stabilit of 2 molecule(d) double and triple bonds

1+. ,s compared to pure atomic orbital t&e &brid orbital &as(a) lo* ener!(b) &i!& ener!(c) same ener!(d) none of t&ese

16. 8epulsion is !reater in

(a) bond pair L bond pair electron(b) bond pair L lone pair electrons

(c) lone pair L lone pair electrons(d) all of abo:e

1#. ;easure of t&e de!ree of polarit is no*n as

(a) /lectron affinit(b) %onic c&aracter of co:alent bond(c) 5ipole"moment(d) %oni7ation ener!

18 t&eor

(a) ;olecular orbitals &a:e lo* ener! t&an atomic orbitals(b) /lectrons pairs sta at maximum distance *it& minimum repulsion(c) &ape of molecules is not explained *ell(d) Done pairs do not attract or repel to eac& ot&er

19. =&e bond order in N2 molecule is

(a) 0(b) 1(c) 2(d) 3

20. ;olecular orbital t&eor explains *ell

(a) tabilit of t&e molecules(b) >arama!netic nature of molecules(c) ond order of molecules(d) ,ll of t&ese


54/95

21. &ic& element &as &i!&est ioni7ation potential

(a) Di(b) Na(c) (d) 8b

22. =&e ener! t&at is required to remo:e an electron from an atom is called(a) /lectron affinit(b) ioni7ation potential(c) /lectrone!ati:it(d) eat of :apori7ation

23. &ic& one is t&e most electrone!ati:e element.

(a) @(b) O

(c) N(d) 'l

2$. &ic& element &as &i!&est ioni7ation potential.

(a) Di(b) e(c) (d) '

2+. ,ccordin! to ;O= *&ic& molecular orbital &as &i!&est ener!

(a) \1s(b) \]2s(c) ^2p(d) \]2px

26. &ic& of t&e follo*in! molecules &a:e &i!&est bond ener!

(a) @2(b) 'l2(c) r2(d) %2

2#. =&e stron!est bond is

(a) ' L '(b) ' '(c) ' '(d) ,ll are equall stron!


55/95

A's(ers Chapter # &

1. =&e ioni7ation ener! of , is lo* and electron affinit of is &i!&.2. @3. '$$. 'O2+. 's@6. O2#. sp


56/95

CHAPTER # &) CHEMICAL BONIN

1. &at is octet ruleE riefl explain.2. 5efine c&emical bond. riefl describe its tpes.3. riefl explain *& cationic radius is smaller t&an t&e parent atom *&ile

anionic radius is lar!er t&an t&e parent atom.

$. riefl explain *& electrone!ati:it increases from left to ri!&t across a period and decreases do*n a !roup.+. 5ifferentiate bet*een ionic radii and co:alent radii.6. 5ifferentiate bet*een first ioni7ation potential and second ioni7ation potential.

& second %.> is al*as !reater t&an first %.>#. & electron ,ffinit :alues for e and ;! are positi:e.


57/95

THERMOCHEMISTR*

Chapter # +

1. @or a !i:en process t&e &eat c&an!es at constant pressure (qp) and at constant

:olume (q:) are related to eac& ot&er4s.

(a) >q >:(b) q p ` q:(c) q p S q:(d) q p q: -2

2. /nt&alp of neutrali7ation of all t&e stron! acids and stron! bases &as t&e same:alue because

(a) neutrali7ation lead to t&e formation of salt and *ater(b) stron! acid and base are ionic substance(c) ,cids al*as !i:e rise to B ions and bases al*as furnis& O" ions(d) =&e net c&emical c&an!e in:ol:es t&e combination of B and O" ions to

form *ater.

3. %f an endot&ermic reaction is allo*ed to tae place :er rapidl in t&e air. =&etemperature of t&e surroundin! air.

(a) remains constant(b) increases(c) decreases(d) first increases t&en decreases

$. %n an exot&ermic reaction is

(a) positi:e(b) ne!ati:e(c) 7ero(d) 1

+. %n an endot&ermic reaction is

(a) positi:e(b) ne!ati:e(c) 7ero(d) 1


58/95

6. , c&emical c&an!e al*as in:ol:e

(a) absorption of &eat(b) e:olution of &eat(c) eit&er absorption or e:olution of &eat(d) t&e liberation of &eat and li!&t ener!

#. &at is for t&is reaction'(s) B O2(!) 'O2(!)

(a) "39$ cal(b) "39.$cal(c) 0.0 cal(d) 29+. cal


59/95

13. ,n endot&ermic reaction is one in *&ic&

(a) /nt&alp of products is !reater t&an reactants(b) /nt&alp of products is less t&an reactants.(c) eat !oes into t&e surroundin! from sstem(d) /nt&alp of reactants and products are same

1$. ,n exot&ermic reaction is one in *&ic&

(a) /nt&alp of products is !reater t&an reactants(b) /nt&alp of products is less t&an reactants.(c) eat !oes into t&e surroundin! from sstem(d) /nt&alp of reactants and products are same

1+. =&e unit of ent&alp c&an!e is

(a) ?oule

(b) coulomb(c) :olt(d) ! m"1 s"1

16. @irst la* of t&ermodnamics is also called

(a) ass4s la*(b) Da* of conser:ation of ener!(c) 'ombine Fas Das(d) enr4s Da*

1#. , substance under!oin! p&sical or c&emical c&an!e is called(a) stem(b) urroundin!(c) tate :ariable(d) 'ompound

1


60/95

20. ,t constant :olume &eat of reaction is represented b

(a) (b) /(c) (d) F

21. %n a bomb calorimeter t&e reaction are carried out at(a) 'onstant :olume(b) 'onstant pressure(c) 'onstant temperature(d) , b and conditions

22. /:aporation of *ater is

(a) ,n exot&ermic c&an!e(b) ,n endot&ermic c&an!e

(c) , process *&ere no &eat c&an!es occur (d) , process accompanied b c&emical reaction

23. eat of neutrali7ation of a stron! acid *it& stron! base is

(a) 13.# cal(b) +# V(c) +.# x 10$V(d) ,ll of t&e abo:e

2$. ess4s la* of &eat summation includes

(a) initial reactants onl(b) initial reactants and final products(c) final products onl(d) intermediates onl

2+. %n *&ic& of t&e follo*in! neutrali7ation reactions t&e &eat of neutrali7ation *ill be &i!&est M

(a) N$O and 2O$(b) 'l and NaO(c) '3'OO and O(d) '3'OO and N$O

26. &ic& one of t&e follo*in! ent&alpies is al*as an exot&ermic process

(a) /nt&alp of atomi7ation(b) /nt&alp of neutrali7ation(c) /nt&alp of ioni7ation(d) /nt&alp of dissociation


61/95

2#. eat c&an!e durin! a c&emical reaction is due to.

a) reain! of bonds b) @ormation of bondsc) ot& JaK and JbK d) None of !i:en

2ressure :olume *or

c) /nt&alp d) Neutrali7ation31. =&e stud of &eat c&an!es accompanin! c&emical reaction is no*n asM

a) =&ermodnamics b) '&emical ineticsc) =&ermo c&emistr d) /lectroc&emistr

32. Neutrali7ation is t&e reaction of.

a) ,n acid *it& salt b) ,n acid *it& metalc) , base *it& *ater d) ,n acid *it& base

33. =&e !lass calorimeter can be used to measure.

a) eat of solution b) eat of combustion.c) eat of Neutrali7ation d) ot& JaK and JcK

3$. 'alorie is equi:alent to

a) 0.$1< V b) $1.


62/95

3#. %n endot&ermic process t&en temperature of sstem.

a) @alls b) 8isec) 8emain constant d) @irst rises t&en decrease.

3


63/95

A's(ers Chapter # +

1. q p S q:2. =&e net c&emical c&an!e in:ol:es t&e combination of B and O" ions to form

*ater.

3. decreases

$. ne!ati:e

+. positi:e

6. eit&er absorption or e:olution of &eat

#. "39$ cal


64/95

THERMOCHEMISTR*

CHAPTER # +

1. 5efine t&ermoc&emistr.2. 5ifferentiate bet*een spontaneous and non spontaneous reactions. Fi:e

examples

3. riefl explain *& exot&ermic reactions are mostl spontaneous.$. 5efine t&e follo*in! terms.+. i) sstem ii)surroundin! iii) state i:) state function.6. ;ention t*o c&aracteristics of state function.#. tate first la* of =&ermodnamics.11. o* ent&alp c&an!e is measured b direct calorimetr.

12. >ro:e t&at c&an!e in ent&alp is equal to &eat of reaction.13. 5efine standard ent&alp of formation. Fi:e an example.1$. 5efine ent&alp of combustion.1+. 5ifferentiate bet*een ent&alp of &dration and &eat or ent&alp of solution.16. riefl explain t&at ent&alp of neutrali7ation is t&e &eat of formation of one

mole of liquid *ater.1#. tate ess4s Da* of 'onstant eat ummation. rite do*n t&e application of

ess4s Da*.1


65/95

CHEMICAL EQUILIBRIUM

Chapter # ,

1. =&e p of 10"3

mole dm"3

of an aqueous solution of 2O$ is(a) 3.0(b) 2.#(c) 2.0(d) 1.+

2. , reaction is re:ersible because(a) 8eactants are reacti:e(b) >roducts are reacti:e(c) >roducts are stable(d) 8eactants are stable

3. , lar!e :alue of c means t&at at equilibrium(a) Dess reactants and more products(b) ;ore reactants and less products(c) ot& are present in approximatel same amounts(d) None of t&ese

$. %n an exot&ermic re:ersible reaction increase in temperature s&ift t&e equilibrium to(a) 8eactant side(b) >roduct side(c) 8emains unc&an!ed

(d) None of t&ese+. uffer action can be explained b

(a) 'ommon ion effect(b) Da* of mass action(c) De"'&atiler4s >rincipal(d) ,ll of abo:e

6. &ic& one of t&e follo*in! c expression is correct for t&e !i:en reaction. N2O$ 2NO2

(a)

c N2O$ - NO2(b) c N2O$ - NO22(c) c N2 O$ - NO2 N2O$(d) c NO22 - N2O$


66/95

#. &ic& one of t&e follo*in! c&an!e *ill fa:our t&e formation of more N3 atequilibrium in t&e !i:en reaction. N2 B 32 2N3

(a) b addin! N3(b) b decreasin! pressure(c) b increasin! pressure

(d) b remo:in! 2


67/95

13. Da* of mass action *as !i:en b

(a) 8amsa and 8elei!&(b) erele and &artl(c) ,rr&enius(d) Fuldber! and *aa!e

1$. , buffer solution can be prepared b

(a) mixin! 'l and Na'l(b) mixin! '2'OO and '3'OONa(c) 2O$ and Na2O$(d) Na2O$ and NaO

1+. p of pure *ater is

(a) 6.2

(b) #(c) 1$(d) 0

16. , buffer solution can be prepared b mixin!

(a) , *ea acid and *ea base(b) , stron! acid and *ea base(c) , stron! acid and its salt(d) , *ea base and its salt

1#. &ic& one of t&e follo*in! aqueous solutions &as t&e &i!&est p

(a) 0.1 ; NaO(b) 0.1 ; 'l(c) 0.2 ; 2O$(d) 0.1 ; NO3

1


68/95

20. , solution &a:in! 7ero p *ill be

(a) &i!&l acidic(b) asic(c) Neutral(d) None of t&ese

21. &at can affect t&e ma!nitude of equilibrium constant p of a re:ersible !aseousreaction.

(a) temperature(b) >ressure(c) 'atalst(d) '&an!e in 'oncentration

22. @or *&ic& reaction t&e numerical :alue of c and p are same

(a) N2(!) B 3 2(!) 2N3(!)(b) 2O2(!) B O2(!) 2O3(!)(c) 2(!) B 'l2(!) 2'l(!)(d) N2O$(!) 2NO2(!)

23. %f sp :alue is lar!e t&e salt in *ater is

(a) less soluble(b) ;ore soluble(c) of moderate solubilit(d) no correlation

2$. On dm3 of a buffer solution containin! 0.01 ; N$'l and 0.1 ; N$O &a:in!>a of + &as p

(a) 9(b) 10(c) $(d) 6

2+. %n a c&emical reaction equilibrium is said to &a:e been establis&ed *&en

(a) for*ard and bac*ard reactions stop(b) concentration of reactants and products are equal(c) rate constants of opposin! reactions are equal(d) rate of for*ard and bac*ard reactions are equal


69/95

26. &ic& of t&e follo*in! *ill c&an!e c for t&e reaction>'l+ >'l3 B 'l2 L &eat

(a) addin! catalst(b) decreasin! pressure(c) increasin! 'l2(d) increasin! temperature

2#. p of uman lood is

(e) #(f) #.$(!) #.<(&) 6.$

2


70/95

3+. , c&emical reaction t&at proceeds onl is one direction is no*n as.

a) 5ecomposition reaction b) ,ddition reactionc) %rre:ersible reaction. d) 8e:ersible reaction

36. >'l+ >'l3 B 'l2 t&e decomposition of >'l+ at equilibrium *ill increase b.

a) %ncreasin! >ressure b) %ncreasin! :olumec) %ncreasin! bot& pressure and :olumed) 5ecreasin! bot& :olume and >ressure

3#. =&e term action mass represent t&e 'on:antration inM

a) ;ols b) ;ole fractionc) ;ole"1 dmB3 d) ;ole dm"3

3 and >O.

a) enderson b) illiamson

c) orenson d) 5a:ison


71/95

A's(ers Chapter # ,

1. 2.#2. >roducts are reacti:e3. Dess reactants and more products$. 8eactant side+. ,ll of abo:e6. c NO22 - N2O$#. b increasin! pressure


72/95

CHAPTER # , )

CHEMICAL EQUILIBRIUM

1. &at do ou mean b re:ersible c&emical reaction.2. 5ifferentiate bet*een &omo!enous and etero!eneous equilibrium.3. tate Da* of ;ass ,ctionE rite do*n its mat&ematical form.

$. 'oncentration of reactants and products remains constant at equilibrium position alt&ou!& reaction continues to tae place. &E+. riefl explain t&e si!nificance of equilibrium constant.6. tate Dec&atlier4s >rincipal.#. o* c&an!e of temperature affects t&e equilibrium constant riefl explain.'l+ >'l3 B 'l2 b. (b) N2(!) B 32(!) 2N3(!)

9. 5eri:e t&e follo*in! relations&ip.a. a. b *

10. 5efine p and pO. >ro:e t&at p B pO 1$11. 'alculate t&e p and pO of 0.1; 'l.12. &at is a uffer solution. Fi:e example of an acid and a ase buffer.13. &at is t&e importance of buffer solutions.1$. 5efine solubilit product.1+. 5efine common ion"effect. &at is its importance.16. rite a c&emical reaction for an equilibrium reaction for *&ic& p c.1#. &at is equilibrium molar 'oncentration constant ( c) E1


73/95

26.

SOLUTIONS

Chapter # -

1. &ic& of t&e follo*in! is a pair of partiall miscible liquids

(a) /t&l alco&ol L *ater(b) 'arbon tetrac&loride L *ater (c) >&enol L ater (d) ;et&l alco&ol L ben7ene

2. 8elati:e lo*erin! of :apour pressure is

(a) /qual to t&e mole fraction of solute and sol:ent(b) =emperature dependent(c) /qual to mole fraction of solute

(d) /qual to t&e mole fraction of sol:ent

3. ,7eotropic mixtures can be separated b

(a) @ractional distillation(b) imple distillation(c) acuum distillation(d) @iltration

$. 10! of NaO &as been dissol:ed per dm3 of solution. =&e molarit of solution is

(a) 0.+ ;(b) 0.2+ ;(c) 1 ;(d) 2;

+. 10! of NaO &a:e been dissol:ed per ! of sol:ent. =&e molalit of solution is

(a) 0.2+ m(b) 0.+ m(c) 1.0 m(d) 2.0 m

6. 1+! of !lucose is dissol:ed for 100 cm3 of solution. =&e percenta!e of solution is

(a) 1+A *-:(b) 10A :-*(c) 1+A :-:(d) 1+A *-*


74/95

#. 8aoult4s la* is obeed b t*o miscible liquids of

(a) 0(b) 0(c) ot& and are 7ero(d) Neit&er nor s&ould be 7ero


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1$. &ic& one of t&e follo*in! is a dilute olutionEa) 10"$ ; 'l b) 10" ; 'lc) 10"# ; 'l d) 10"10 ; 'l

1+. %n *&ic& of t&e follo*in! 'oncentration unit t&e olution is =aen in !E

a) ;ole reaction b) ;olarit

c) ;olalit d) A - 16 =&e :olume of mole fraction of an component in a solution is al*as.

a) /qual to 1 b) Freater t&en 1c) @ractional d) Dess t&an 1

1#. , solution p&sicall exits in &o* man p&asesE

a) One b) =*oc) =&ree d) @our

1ressure b) =emperaturec) 'oncentration of solution d) 'oncentration of sol:ent.

21. &ic& one of t&e follo*in! is not a colli!ati:e >ropertE

a) 5epression of @.> b) Osmotic >ressurec) 5ecrease

of olume d) Do*erin! of .>.

22. =&e olution 'ur:e for Na'l is.

a) 8isin! line b) @allin! li:ec) trai!&t line d) 5iscontinouse line


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23. Na'l s&o* a :er small c&an!e in solubilit from 00' to1000' because its.

a) eat of solution is >ositi:e. b) eat of solution is ne!ati:ec) eat of solution is approx. 7ero

d) %ts dissolution is exot&ermic2$. =&e :olume of ebullioscopic 'onstant depends upon.

a) Nature of bot& solution and olution b) Nature of olution rat&er ol:entc) Nature of sol:ent rat&er soluted) None of !i:en

2+. =&e molal boilin! point 'onstant is also called.

a) 'roscop 'onstant b) ,r&enius 'onstantc) /bulliosopic constant d) olt7 mann 'onstant

26. =&e :alue of croscop constant depends upon.

a) Nature of bot& solute and sol:ent b) Nature of solute rat&er sol:ent.c) Nature of sol:ent rat&er soluted) Nature of !i:en.

2#. ;oralit of >ure *ater is.

a) 1 b) 1<c) ++.+ d) 6

2


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31. ater and ben7ene isMa) ;iscible liquid b) %mmisicible.c) >artiall miscible d) ,ll of t&e abo:e

32. ;olal .> 'onstant b depends on.

a) Nature of solute b) Nature of sol:entc) ot& a Q b d) ,ll of t&e !i:en

33. =&e temperature at *&ic& partiall miscible pair of liquid leads to t&e formationof sin!le p&ase is called.

a) =ransition temperature b) ,bsolute temperaturec) 'onsulate temp d) ot& a Q b.

3$. 'rstalline ubstance *&ic& contains c&emicall combined *ater in a definite proportion is called.

a) ,n&drate b) dratec) ,morp&ous d) None of !i:en

3+. alt of *ea acid *it& stran!e base *&en dissol:ed in 2O !i:es

a) ,cidic b) asicc) Nentral d) None

36. =&e molal free7in! point 'onstant is also no*n as.

a) ,7eotropic constant b) ,rr&erniusc) 'roscopic constant d) /bullioscopic

3#. &ic& one is 7eotropic mixtureE

a) /t&anol L *ater b) 'l L ,=/8 c) ;et&anol L *ater d) None of t&ese

3


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c) ;olarit d) ;ole fraction. A's(ers Chapter # -

1. >&enol L ater 2. /qual to mole fraction of solute3. acuum distillation

$. 0.2+ ;+. 0.2+ m6. 1+A *-:#. ot& and are 7ero


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CHAPTER # -) SOLUTIONS

1. 5efine solution. &at are different tpes of solutions2. 5ifferentiate bet*een ;olarit and ;olalit. .3. 'alculate t&e ;olalit of a solution in *&ic& 20! of !lucose are dissol:ed in

+00! of *ater.$. 'alculate t&e molarit of t&e follo*in! solutions.

a. 10A NaO solution b. 12! 2O$ in $00cm3 solution.

+. o* *ould ou express percenta!e composition of a solution.6. &at is percenta!e *ei!&t be :olume.#. 5ifferentiate bet*een ideal and non"ideal solution !i:e examples.


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ELECTROCHEMISTR*

Chapter # 1.

1. &ic& one of t&e follo*in! is oxidation state of carbon in '612O6

(a) 0(b) B6(c) "6(d) B12

2. =&e oxidation number of c&romium in 2'r 2O# is

(a) 1$

(b) 12(c) 6(d) 3

3. &ic& statement is correct about t&e !i:en cell representationUn(s) 7n2B(aq) 'u2B(aq) 'u (s)

(a) 'opper is deposited at anode(b) 'opper is reduced(c) Uinc ions are reduced to 7inc metal(d) 'opper is oxidi7ed

$. &ic& statement is correct about electrolsis of molten Na'l

(a) Oxidation tae place at cat&ode(b) 'l2 !as is formed at anode(c) 8eduction occur at anode(d) 2 !as is formed at cat&ode

+. , &alf cell reaction is defined as

(a) occurs at one electrode

(b) !oes onl &alf *a to completion(c) in:ol:es onl &alf a mole of electrolte(d) is al*as a cat&ode reaction

6. , cell *&ic& produces electrical current b an oxidation reduction reaction isno*n as

(a) :oltaic cell(b) standard cell(c) re:ersible cell(d) electroltic cell


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#. =&e cell in *&ic& a non spontaneous redox reaction taes place as a result ofelectricit is no*n as

(a) oltaic cell(b) 5enial cell(c) 5r cell

(d) /lectroltic cellb(b) >b coated *it& >bO2(c) >bO$(d) ;ixture of >b and >bO2

13. %n electroltic cells t&e c&emical c&an!es ma be

(a) al*as spontaneous(b) al*as non"spontaneous(c) ;a be eit&er spontaneous or non"spontaneous(d) None of t&ese


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1$. &ic& one of t&e follo*in! is a correct statement about batter and cell.

(a) atter is anot&er name of cell(b) , batter &as more t&an one cells(c) , cell &as more t&an one batteries(d) , batter is c&ar!eable *&ere cell is not

1+. =&e best electrolte used in salt brid!e is 'l. &ic& ot&er electrolte can also beused for t&is purpose.

(a) NaNO3(b) NO3(c) N$ NO3(d) Na'l

16. , primar cell is t&at

(a) &ic& is not c&ar!eable(b) &ic& is c&ar!eable(c) %n *&ic& one electrode used it standard &dro!en electrode(d) &ose potential difference is 7ero

1#. , secondar cell is t&at

(a) &ic& is not c&ar!eable(b) &ic& is c&ar!eable(c) %n *&ic& one electrode is /(d) &ose potential difference is 7ero

1b is con:erted to >bO$(b) >bO$ is con:erted to >b(c) >bO2 is con:erted to >bO$(d) >b is con:erted to >bO2

19. =&e most common fuel used in fuel cells are

(a) 2 and '$(b) '$ and O2(c) 2 and O2(d) O2 and '26

20. &ic& statement is incorrect for fuel cells

(a) =&e operates at :er lo* temperature(b) ater is produced is t&e cell(c) 2 and O2 are used as fuel(d) ,queous O is used as electrolte in fuel cell


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21. %n N%',5 dr cell t&e cat&ode and anode is made up of

(a) 'd and ,!(b) Ni and 'dO2(c) NiO2 and 'd(d) ,! and ,!2O

22. 'a and Di metals ma be arran!ed in t&e decreasin! order of t&eir reduction potential as M

(a) 'a Di(b) 'a Di(c) Di 'a (d) Di 'a

23. =&e metal *&ic& does not displaces 'u2B from 'uO$ is

(a) Un

(b) ;!(c) ,!(d) @e

2$. &ic& one of t&e follo*in! reactions is not feasible

(a) @e B 2O$ @eO$ B 2(b) 2'u B ,!NO3 'u(NO3)2 B 2,!(c) 2r B %2 2l B r 2(d) 'uO B 2 'u B 2O

2+. %n balancin! t&e !i:en &alf reactionO$ 2" B


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2


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26. 'l"1 is oxidi7ed to 'l22#. ,n allo2


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CHAPTER # 1.)

ELECTROCHEMISTR*

1. 5efine electroc&emistr electrolsis and electrical conduction..2. 5ifferentiate bet*een stron! electroltes and *ee electroltes.3. 5ra* a dia!ram s&o*in! an electroltic cell.$. &at is an electrode. 5ifferentiate bet*een cat&ode and anode.+.

5efine oxidation and reduction.6. 5efine electro"*innin! of metals. Fi:e an example.#. 5ifferentiate bet*een bet*een electroltic cell and !al:anic cell.


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13. =&e en7me *&ic& can catalse t&e con:ersion of !lucose to et&anol is

(a) Umase(b) %n:ertase(c) ;at&ase(d) 5iastase

1$. /n7mes are

(a) ;icro"or!anisms(b) >roteins(c) %nor!anic compounds(d) ;oulds

1+. @or t&e !i:en equation 22 B 2NO 22O B N2 t&e rate equation isdx-dt 2 NO2 t&en *&at is order of reaction

(a) 7ero order(b) first order(c) second order(d) t&ird order

16. , student started to *or on +0! of a compound J,K *&ose &alf life is + &ours.o* muc& of t&e compound left after 20 &ours.

(a) 3.12+!(b) 6.2+!(c) 12.+!

(d) 2+!1#. =&e slope of t&e ,rr&enius equation can be represented as

(a) /a-2.3038= B lo! ,(b) L/a-2.3038=(c) L/a-2.3038 (d) L/a-8=

1


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20. o* muc& raise in temperature approximatel doubles t&e reaction rateE

a) 20 b) 10 c) 30 d) +

21. =&e minimum amount of ener! *&ic& is required b molecules to form acti:atedcomplex is called.

a) ond ener! b) %oni7ation ener!c) ,cti:ation ener! d) Dattice ener!

22. =&e unit of reaction rate is.

a) mol dmB3 b) mol dm"3 "1

c) mol dm"3 d) mol dm3 "1

23. &ic& reaction *ill al*as be exot&ermicE

a) Oxidation b) 5e&dro!enation

c) ublimation d) Nentrali7ation2$. =&e branc& of c&emistr *&ic& reaction *it& deals of rate of reaction is called.

a) 8eaction inetics b) ioc&emistrc) /lectro c&emistr d) toic&iometr

2+. &en NaO solution reacts *it& ,l in different p&sical states most rapidreaction occurs *it&E

a) ,luminium foil b) 'ubes of ,l

c) ,luminum po*der d) ,llo of ,l26. &en a reaction proceed in a sequence of steps t&e o:erall rate is determined b.

a) @astest step b) lo*est stepc) Order of different stepse) ;olecularit of all t&e step

2#. %2 B 2 2% is order of reaction.

a) @irst b) econdc) =&ird d) Uero

2


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c) >ressure d) ,ll abo:e

30. , process is said to be a &omo!eneous catalst *&en.

a) ot& reactants and >roducts in same p&ase. b) ot& reactants and contalst in same p&asec) ot& products and 'atalst are in same p&ase

e) 8eactants products and catalst all are in same p&ase31. it& increase in e:er 10 rise in temperature t&e rate of reaction becomes.

a) 5oubled b) =&ree timesc) 8educed to one &alf d) @our time

32. &ic& of t&e follo*in! relation is correctE

a) α 1 / = b) /a α =c) α 1 / /a d) None of t&es

33. 8adioacti:e disinte!ration are al*as.

a) Uero order b) @irst order c) 2nd order d) 3rd order

3$. dro!enation of :e!etable oil acceleration b.

a) Ni b) Nac) ;! d) e

3+. Fenerall t&e exot&ermic reactions are more feasible because of.

a) i!& ∆ :alue b) Do* /ac) Do* ∆ :alue d) i!& /a

36. &ic& one of t&e follo*in! don4t &a:e lo* rateE

a) 8ustin! of iron b) @ermentation of su!ar c) eat&erin! of rocs b atomsp&eric effect.d) drolsis of an ester

3#. =&e disinte!ration of radioaction 92G23+ is a.

a) Uero order reaction b) @irst order reactionc) 2nd order reaction d) 3rd order reaction

3


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39. it& t&e passa!e of time t&e reaction rate.

a) 5ecereases b) %ncreasesc) ame d) None of t&e abo:e

$0. alf life 1st order reaction is equal to.

a) 1 - a b) 1.+ - ac) 0.693 - d) 1 -

A's(ers Chapter # 11

1. s"12. 8ate determinin! step3. 3$. Umase+. rate is not affected b c&an!in! concentration of reactants6. 0#. 1roteins1+. t&ird order16. 3.12+!1#. L/a-2.3038 1


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31. 5oubled32. α 1 - /a33. @irst order 3$. Ni3+. Do* /a36. drolsis of an /nter 3#. 1st order reaction3


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/INETICS

CHAPTER # 11

1. 5efine inetics.2. 5efine rate of reaction. &at are t&e units of reaction rate.

3. 5ifferentiate bet*een a:era!e rate and instantaneous rate.$. &at is order of reaction. 5efine 7ero order reaction.+. 'an order of a reaction be in fraction. %f so Fi:e examples.6. &at is &alf life periodE#. alf life period of first order reaction is independent of initial concentration.

%s it true for 2nd order reaction.

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