class_11_chemistry_solved_sample_paper_02.pdf

8/14/2019 class_11_chemistry_solved_sample_paper_02.pdf

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QUESTION PAPER 2

Time : Three Hours Max. Marks : 70

e!era" I!s#ru$#io!s

%. A"" &ues#io!s are $om'u"sor(.

2. Ques#io! !os. % #o ) are *er( shor# a!s+er &ues#io!s a!, $arr( % mark

ea$h.

-. Ques#io! !os. #o %) are shor# a!s+er &ues#io!s a!, $arr( 2 marks

ea$h.

/. Ques#io! !os. % #o 27 are a"so shor# a!s+er &ues#io!s a!, $arr( -

marks ea$h

. Ques#io! !os. 2) #o -0 are "o!1 a!s+er &ues#io!s a!, $arr( marks

ea$h

. Use "o1 #a3"es i4 !e$essar(5 use o4 $a"$u"a#ors is !o# a""o+e,.

Q1. Calculate the number of atoms in 4g of He.

Q2. Which quantum numbers originate from Schrodinger wave equation?

Q. Which of the two is bigger in si!e and wh"? Cl or Cl#

Q4.$redict the sha%e of Cl& and '& on the basis of (S)$* theor"

Q+.What is the con,ugate base of HC-#

and H2-?

Q. /efine dis%lacement reactions. 0ive one eam%le for it.

Q. Wh" are metallic h"drides used for storing h"drogen?

Q3. ame the two methods for estimation of nitrogen.

Q5. How man" grams of a2C- should be dissolved to ma6e 177 cc of 7.1+8

a2C-?

Q17. 9ellow light emitted from a sodium lam% has a wavelength of +37 nm.

Calculate frequenc" and wave number of the "ellow light?

Q11.

:a; What is the h"bridi!ation of central atom in following? H < C2H2

:b; What is the di%ole moment of CCl4 molecule? =ccount for "our answer.

Q12. /escribe the h"bridi!ation in case of $Cl+. Wh" are aial bonds longer as

com%ared to the equatorial bonds?

Q1. >sing van der Waals equation of state< calculate the %ressure erted b"

3.+g of H contained in 7.+@ vessel at 77A. &or =mmonia< a B 4.7 atm @2

mol#2

and b B 7.7 @ mol#1

Q14. ame the intermolecular forces between :a; He atoms in liquid He

:b; wo H& molecules

Q1+. Calculate the oidation number of 8n in A28n-4 and in H-


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Q1. Com%lete the given equationsD

Q1. 0ive reasons for the following

:a; =l6ali metals im%art colour to the flame.

:b; )%lain wh" al6ali and al6aline earth metals cannot be obtained b"

chemical reduction methods?

-r

=ccount for the followingD

:a; Second ioni!ation enthal%" of a is higher than 8g.:b; Cs is used etensivel" in %hotoelectric cells.Q13 .What is Eeolites? 0ive a use and an eam%le of Eeolites.Q15D

a; =n element with at.no. has the following configurationsD

Which of the two is correct and wh"?

Q27. Write balanced equations or reactions betweenD

:i; a2-2 and water

:ii;A-2 and water

:iii;a2- and C-

2

Q21.

:a; /efineD

:i; Fntensive %ro%erties

:ii; =diabatic %rocess

:b; Starting with thermod"namic relationshi% 0 B H# S derive thefollowing relationshi% G0B #GS total

Q22.

:a;What is meant b" the notation G0< GS and GH? 0ive the relationshi%

between them.

:b; State Hesss @aw of constant heat summation.

Q2.

:i; How would "ou ,ustif" the %resence of 13 elements in the +th

%eriod of the

$eriodic able?

:ii; Write the general electronic configuration of %#bloc6 and f#bloc6


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elements.

-r

:i; Which of the following will have the most negative electron gain enthal%"

and which will have the least negative electron gain enthal%"? $< S< Cl< &.

)%lain "our answer.

:ii;$redict the formula of binar" com%ound of

:a;=luminium and iodine

:b; @ithium and o"gen

Q24. 0ive F>$=C names of followingD

Q2+D

:a;What conclusion would "ou draw if the @assaignes etract gives a blood red

colouration with &eCl?

:b;

Which of the given free radicals is most stable and wh"?:c; Wh" is an organic com%ound fused with metallic sodium for testing for < S and

halogens?

Q2. Write a short note on the followingD

:i; Wurt! *eaction

:ii; &riedel#crafts al6"lation

Q2. /efineD

:i; 'iochemical -"gen /emand :'-/;:ii; -!one Hole:iii; 0reen Chemistr"Q23. Calculate the molar solubilit" of i :-H;2 in 7.17 8 a-H. he

solubilit" %roduct of i:-H;2 is 2.7 17#1+.

-r

)qual volumes of 2+.7 cm

of +.7 17#2

8 'a:-;2 and 2 17#2

8 a&

solution are mied. $redict whether 'a&2 will be %reci%itated or not

:As% of 'a&2 B 1. 17#

at 253 A;

Q25. 0ive reasons for the followingD

:a; ISi&J2# is 6nown whereas ISiClJ

2# is not 6nown.


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:b; /iamond is covalent< "et has high melting %oint.

:c; $bK2is more stable than $bK4:KB Cl< 'r;

:d; 'oron is unable to form ' ion.

:e; '&behaves as @ewis acid.-r

:a; 0ive one method for industrial %re%aration and one for laborator"

%re%aration of C- and C-2 each.

:b; Select the member:s; of grou% 14 that :i; forms the most acidic dioide :ii;

used as semiconductors.

:c; )%lain structure of /iborane.

Q. 7. =ssign structures for the followingD

:a; =n al6"ne :K; has molecular formula C+H3. Ft reacts neither with sodamide norwith ammoniacal cu%rous chloride.

:b; = h"drocarbon L9 decolourises bromine water. -n o!onol"sis it gives

#8eth"lbutanal and formaldeh"de. 0ive the name of the com%ound.

: c; = h"drocarbon :E; has molecular formula C3H17. Ft does not decolourise

bromine water and is oidi!ed to ben!oic acid on heating with A2Cr2-. Ft can

also have three other isomers =< ' and C. Write the structure of E< =< ' and C.

-r

:a; -ne mole of a h"drocarbon :=; reacts with one mole of bromine giving a

dibromo com%ound< C+H17'r2. Substance :=; on treatment with cold dilute al6aline

A8n-4 solution forms a com%ound C+H12-2. -n o!onol"sis :=; gives equimolar

quantities of %ro%anone and ethanal. /educe the structural formula of :=;.

:b;How will "ou convert?

:i; )th"ne to 8ethane

:ii; )thene to )th"ne

:iii; 8ethane to )thane


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ANS6ERS QP 2

1. -ne mole of atoms B .722 172 atomsB0ram atomic mass of element0ram atomic mass of heliumB 4g. herefore number of atoms in 4 g helium

B .72 172 atoms.

2. $rinci%al quantum number :n;< =!imuthal quantum number :l; andmagnetic quantum number :ml;.

. Cl# is bigger in si!e. his is because addition of an electron causes adecrease in effective nuclear charge thus causing increase in si!e.

4.a; Cl&D # sha%eb; '&D rigonal %lanar

+.a; Con,ugate base of HC-# D C- 2#b; Con,ugate base of H2-D -H#

. *eaction in which one ion:or atom;in a com%ound is re%laced b" an ion :oratom; of other elements is called dis%lacement reaction.

. 8etallic h"drides tra% h"drogen in their voids forming interstitial h"drides

class_11_chemistry_solved_sample_paper_02.pdf

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