Past Year Paper, Chemistry (Set - 2 ), Delhi, 2014, Class 12, Chemistry | Additional Study Material for Class 12 PDF Download

 Page 1


Series : OSR/I
+nt.
Roll No.
fr?ttfu$qzt: 3 
qoq
Time allowed:3 hours 
l
fits'i.
Code No.
s6lu2
+tssi Efi
Tq-YlE
rr{ qErs 
flerii r
Candidates must write the Code on
the title page of the answer-book.
o 
Str-{r 
sirq 
+'rd flq,'vs 
qqtrr-Er 
{ 
Ilrf, 
ge 
11 t r
o Irsr-wr { 
qrf6+ 
6rq 6t sil{ fqq.rq 
qilsqq{s} 
urd ffi{-gks, *Ee-ys.nflad r
o gtrqrd,'qq,ri{t+'qsqq"r-Erii 
so snt r
o 
SrFlTtlFT6,rsir{frs{rvJ{"^6,r++qtrd, 
qf{6'rf,qi6^ 
wqqqftrd r
. 
Es trlcr-q:r si 
qo+ 
+ fdq 15 fiT{e 
irr 
{Er{r fEqr 
.rqr 
t r 
yqr-.H 
*r fl+etq gqlqr it 
to. ts 
qQ
f*qr 
qr+qT 
r 10.15 
qq 
t 10.30 
qQ 
aq; sa **o 
qsr-wr qfi 
Gil{ qs 
erqfrr + d{H * src-
gksTqr+ttr+rqtTfuidt 
r
o 
Please check that this question paper contains 11 printed pages.
o 
Code number given on the right hand side of the question paper should be written on the
title page of the answer-book by the candidate.
o 
Please check that this question paper contains 30 questions.
o 
Please write down the Serial Number of the question before attempting it.
I 
15 minutes time has been allotted to read this question paper. The question paper will be
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will only read the
question paper and will not write any answer on the answer-book during this period.
rqTFI"TfrTTl-q(+qrP,ffi)
CHEMISTRY (Theory)
nrm{frT+vr:
(i) afiswatMt r
(ii) vnr-viglrt dA aa-'arfr ag-eat\+rwS 1yfionw #forr 
,:r*,'i 
r
(iii) sFr-tiqr9 *rc d-aag-irmbrr+|. tsdrwr*fdqz er+-d- I
(iv) 
ymr<iqr 
t9 lzz tqtt? ag-eatfu rw t r s-d€y?a #frr<rt or+'* I
(v) 
yw-tiqrzt 
tso 
q?d-wtqrrs# 
rs-dtyw#ftzqrs eras I
(vi) 
qrqwadllsTrfrq*wif 
wsqhr n+ / 
@ 
#swhT+? etpfu 
m?* r
pftrqdq etq 
:70
I 
Maximum Marks : 70
s6fit2
[P.T.O.
Page 2


Series : OSR/I
+nt.
Roll No.
fr?ttfu$qzt: 3 
qoq
Time allowed:3 hours 
l
fits'i.
Code No.
s6lu2
+tssi Efi
Tq-YlE
rr{ qErs 
flerii r
Candidates must write the Code on
the title page of the answer-book.
o 
Str-{r 
sirq 
+'rd flq,'vs 
qqtrr-Er 
{ 
Ilrf, 
ge 
11 t r
o Irsr-wr { 
qrf6+ 
6rq 6t sil{ fqq.rq 
qilsqq{s} 
urd ffi{-gks, *Ee-ys.nflad r
o gtrqrd,'qq,ri{t+'qsqq"r-Erii 
so snt r
o 
SrFlTtlFT6,rsir{frs{rvJ{"^6,r++qtrd, 
qf{6'rf,qi6^ 
wqqqftrd r
. 
Es trlcr-q:r si 
qo+ 
+ fdq 15 fiT{e 
irr 
{Er{r fEqr 
.rqr 
t r 
yqr-.H 
*r fl+etq gqlqr it 
to. ts 
qQ
f*qr 
qr+qT 
r 10.15 
qq 
t 10.30 
qQ 
aq; sa **o 
qsr-wr qfi 
Gil{ qs 
erqfrr + d{H * src-
gksTqr+ttr+rqtTfuidt 
r
o 
Please check that this question paper contains 11 printed pages.
o 
Code number given on the right hand side of the question paper should be written on the
title page of the answer-book by the candidate.
o 
Please check that this question paper contains 30 questions.
o 
Please write down the Serial Number of the question before attempting it.
I 
15 minutes time has been allotted to read this question paper. The question paper will be
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will only read the
question paper and will not write any answer on the answer-book during this period.
rqTFI"TfrTTl-q(+qrP,ffi)
CHEMISTRY (Theory)
nrm{frT+vr:
(i) afiswatMt r
(ii) vnr-viglrt dA aa-'arfr ag-eat\+rwS 1yfionw #forr 
,:r*,'i 
r
(iii) sFr-tiqr9 *rc d-aag-irmbrr+|. tsdrwr*fdqz er+-d- I
(iv) 
ymr<iqr 
t9 lzz tqtt? ag-eatfu rw t r s-d€y?a #frr<rt or+'* I
(v) 
yw-tiqrzt 
tso 
q?d-wtqrrs# 
rs-dtyw#ftzqrs eras I
(vi) 
qrqwadllsTrfrq*wif 
wsqhr n+ / 
@ 
#swhT+? etpfu 
m?* r
pftrqdq etq 
:70
I 
Maximum Marks : 70
s6fit2
[P.T.O.
General Instructions
(i) All questions are compulsory.
(ii) 
Question 
numbers 1 to I are very short-answer questions and carry 7 mark each.
(iii) 
Question 
numbers 9 to 18 are short-answer questions and carry 2 marks each.
(iv) 
Question 
numbers 19 to 27 are also short-answer questions and carry 3 marks
each.
(v) 
Question 
numbers 28 to 30 are long-answer questions and carry 5 marlcs each.
(vi) tJse l-og Tables, if necessary. Use of calculators is not allowed.
1. da (sol) 
glh-+d 
Gel) 
trT 
\rs-qqtsqrtruTt 
| 
1
Give one example each of sol and gel.
2. ftwftnaqris+ftiq{+erqw.tqiw+1fifiil+ffi 6}at errqrqs'ErBr*rrfuqrqmrt ? I
Which reducing agent is employed to get copper from the leached low grade copper
ore ?
3. Frq dtrou IUPAC 
qFT 
ftrdi :
cH.-9H-CHz-CHO
"l
NH2
Write the IUPAC name of the compound
cH"-cH-cH2-cHo
,l
NHz
4. rq 
oTr{€tq{i 
tsq-qffiM.) 
{ t 
q+{ qr 
efir*'qlqvftd 
t t
q-qr{ifu{d eiq p-qr{dtFfrm
Which of the following isomers is more volatile :
o-nitrophenol or p-nitrophenol ?
s. 
56 
rq lqDm H 
qr+ y{'Qffi{e' q{r} 
t I Tr 
tfv+*tq 
wr t}* t t
Some liquids on mixing form 'azeotropes'. What are 'azeotropes' ?
6. Frq 
q\ffi 
s) {6fi 
Ei^q{rfto,,,dr 
*-mq { 
qqfsm 
dfsr+ :
c6HsNH2, C6H5NHCH3' C6H5CHTM'
Arrange the following in increasing order of basic strength :
6H5NH2, 
C6H5NHCH3' C6H5CH2NH2
56m2 
'2
Page 3


Series : OSR/I
+nt.
Roll No.
fr?ttfu$qzt: 3 
qoq
Time allowed:3 hours 
l
fits'i.
Code No.
s6lu2
+tssi Efi
Tq-YlE
rr{ qErs 
flerii r
Candidates must write the Code on
the title page of the answer-book.
o 
Str-{r 
sirq 
+'rd flq,'vs 
qqtrr-Er 
{ 
Ilrf, 
ge 
11 t r
o Irsr-wr { 
qrf6+ 
6rq 6t sil{ fqq.rq 
qilsqq{s} 
urd ffi{-gks, *Ee-ys.nflad r
o gtrqrd,'qq,ri{t+'qsqq"r-Erii 
so snt r
o 
SrFlTtlFT6,rsir{frs{rvJ{"^6,r++qtrd, 
qf{6'rf,qi6^ 
wqqqftrd r
. 
Es trlcr-q:r si 
qo+ 
+ fdq 15 fiT{e 
irr 
{Er{r fEqr 
.rqr 
t r 
yqr-.H 
*r fl+etq gqlqr it 
to. ts 
qQ
f*qr 
qr+qT 
r 10.15 
qq 
t 10.30 
qQ 
aq; sa **o 
qsr-wr qfi 
Gil{ qs 
erqfrr + d{H * src-
gksTqr+ttr+rqtTfuidt 
r
o 
Please check that this question paper contains 11 printed pages.
o 
Code number given on the right hand side of the question paper should be written on the
title page of the answer-book by the candidate.
o 
Please check that this question paper contains 30 questions.
o 
Please write down the Serial Number of the question before attempting it.
I 
15 minutes time has been allotted to read this question paper. The question paper will be
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will only read the
question paper and will not write any answer on the answer-book during this period.
rqTFI"TfrTTl-q(+qrP,ffi)
CHEMISTRY (Theory)
nrm{frT+vr:
(i) afiswatMt r
(ii) vnr-viglrt dA aa-'arfr ag-eat\+rwS 1yfionw #forr 
,:r*,'i 
r
(iii) sFr-tiqr9 *rc d-aag-irmbrr+|. tsdrwr*fdqz er+-d- I
(iv) 
ymr<iqr 
t9 lzz tqtt? ag-eatfu rw t r s-d€y?a #frr<rt or+'* I
(v) 
yw-tiqrzt 
tso 
q?d-wtqrrs# 
rs-dtyw#ftzqrs eras I
(vi) 
qrqwadllsTrfrq*wif 
wsqhr n+ / 
@ 
#swhT+? etpfu 
m?* r
pftrqdq etq 
:70
I 
Maximum Marks : 70
s6fit2
[P.T.O.
General Instructions
(i) All questions are compulsory.
(ii) 
Question 
numbers 1 to I are very short-answer questions and carry 7 mark each.
(iii) 
Question 
numbers 9 to 18 are short-answer questions and carry 2 marks each.
(iv) 
Question 
numbers 19 to 27 are also short-answer questions and carry 3 marks
each.
(v) 
Question 
numbers 28 to 30 are long-answer questions and carry 5 marlcs each.
(vi) tJse l-og Tables, if necessary. Use of calculators is not allowed.
1. da (sol) 
glh-+d 
Gel) 
trT 
\rs-qqtsqrtruTt 
| 
1
Give one example each of sol and gel.
2. ftwftnaqris+ftiq{+erqw.tqiw+1fifiil+ffi 6}at errqrqs'ErBr*rrfuqrqmrt ? I
Which reducing agent is employed to get copper from the leached low grade copper
ore ?
3. Frq dtrou IUPAC 
qFT 
ftrdi :
cH.-9H-CHz-CHO
"l
NH2
Write the IUPAC name of the compound
cH"-cH-cH2-cHo
,l
NHz
4. rq 
oTr{€tq{i 
tsq-qffiM.) 
{ t 
q+{ qr 
efir*'qlqvftd 
t t
q-qr{ifu{d eiq p-qr{dtFfrm
Which of the following isomers is more volatile :
o-nitrophenol or p-nitrophenol ?
s. 
56 
rq lqDm H 
qr+ y{'Qffi{e' q{r} 
t I Tr 
tfv+*tq 
wr t}* t t
Some liquids on mixing form 'azeotropes'. What are 'azeotropes' ?
6. Frq 
q\ffi 
s) {6fi 
Ei^q{rfto,,,dr 
*-mq { 
qqfsm 
dfsr+ :
c6HsNH2, C6H5NHCH3' C6H5CHTM'
Arrange the following in increasing order of basic strength :
6H5NH2, 
C6H5NHCH3' C6H5CH2NH2
56m2 
'2
7. €d'ff dq 
qr 
trm'u-wtg 
+T vndq 
qrrot 
eil{=rm ii qfudq 
t r
Which component 
of starch is a branched polymer 
of o-glucose and insoluble in water ?
8. ftE{ {*,d { * 
qir 
wr €rftrn'en+ 
*il t 
ske} 
r
[Co(NH)6]3* +{ 
[Co(en)r]3+
Which of the following is more stable complex and why ?
[Co(NH)6]3* and 
[Co(en)r]3+
g. 
ffi urftqq fuI r loqft +fi s1ffi rn{ gdwfrildrq{ETqqH 
sr*Trwne*dr 
t r 2
State Henry's law. What is the effect of temperature on the solubility of a gas in a
liquid ?
10. frq 
EI si 
qftqrkd 
fr1Fr+ :
(i) oTFTTS 
@seudo) 
sEq dfe6t srfi{pmur 
r
(ii) 
ffi ernrfrqrm 
ertloro 
ltro).
Define the following terms :
(i) 
Pseudo fust order reaction
(ii) 
Half life period 
of reacrion (ty2).
I t. 
yilT{ 
firqrqf *t frrr frft{rrf + silqrw 
frqq ffi 
.
(i) 
rrqrkfr *qr 
Glydraulic washing)
(ii) 
ilwtFfr ltrrr (Vapourphaserefining)
write the principle 
behind the following methods of refining :
(i) . 
Hydraulic 
washing
(ii) 
Vapour phase 
refining
tz. Frr 
ii 
+ rer 
qfi{PsqT 
{ qp 
+ilH semot drqqr 
M :
(i) 
Gou 
soc/z'
(ii) 
GcHz- 
cH= cH2 +1s1 
ffi*,
Draw the structure of m1j9r monohalo product 
in each of the following reactions :
(i) 
GoH 
soc/2,
(ii) 
GcHz 
- 
cH = cH, + 
1191 
Peroxide,
2
)
s6tu2
lP.T.O.
Page 4


Series : OSR/I
+nt.
Roll No.
fr?ttfu$qzt: 3 
qoq
Time allowed:3 hours 
l
fits'i.
Code No.
s6lu2
+tssi Efi
Tq-YlE
rr{ qErs 
flerii r
Candidates must write the Code on
the title page of the answer-book.
o 
Str-{r 
sirq 
+'rd flq,'vs 
qqtrr-Er 
{ 
Ilrf, 
ge 
11 t r
o Irsr-wr { 
qrf6+ 
6rq 6t sil{ fqq.rq 
qilsqq{s} 
urd ffi{-gks, *Ee-ys.nflad r
o gtrqrd,'qq,ri{t+'qsqq"r-Erii 
so snt r
o 
SrFlTtlFT6,rsir{frs{rvJ{"^6,r++qtrd, 
qf{6'rf,qi6^ 
wqqqftrd r
. 
Es trlcr-q:r si 
qo+ 
+ fdq 15 fiT{e 
irr 
{Er{r fEqr 
.rqr 
t r 
yqr-.H 
*r fl+etq gqlqr it 
to. ts 
qQ
f*qr 
qr+qT 
r 10.15 
qq 
t 10.30 
qQ 
aq; sa **o 
qsr-wr qfi 
Gil{ qs 
erqfrr + d{H * src-
gksTqr+ttr+rqtTfuidt 
r
o 
Please check that this question paper contains 11 printed pages.
o 
Code number given on the right hand side of the question paper should be written on the
title page of the answer-book by the candidate.
o 
Please check that this question paper contains 30 questions.
o 
Please write down the Serial Number of the question before attempting it.
I 
15 minutes time has been allotted to read this question paper. The question paper will be
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will only read the
question paper and will not write any answer on the answer-book during this period.
rqTFI"TfrTTl-q(+qrP,ffi)
CHEMISTRY (Theory)
nrm{frT+vr:
(i) afiswatMt r
(ii) vnr-viglrt dA aa-'arfr ag-eat\+rwS 1yfionw #forr 
,:r*,'i 
r
(iii) sFr-tiqr9 *rc d-aag-irmbrr+|. tsdrwr*fdqz er+-d- I
(iv) 
ymr<iqr 
t9 lzz tqtt? ag-eatfu rw t r s-d€y?a #frr<rt or+'* I
(v) 
yw-tiqrzt 
tso 
q?d-wtqrrs# 
rs-dtyw#ftzqrs eras I
(vi) 
qrqwadllsTrfrq*wif 
wsqhr n+ / 
@ 
#swhT+? etpfu 
m?* r
pftrqdq etq 
:70
I 
Maximum Marks : 70
s6fit2
[P.T.O.
General Instructions
(i) All questions are compulsory.
(ii) 
Question 
numbers 1 to I are very short-answer questions and carry 7 mark each.
(iii) 
Question 
numbers 9 to 18 are short-answer questions and carry 2 marks each.
(iv) 
Question 
numbers 19 to 27 are also short-answer questions and carry 3 marks
each.
(v) 
Question 
numbers 28 to 30 are long-answer questions and carry 5 marlcs each.
(vi) tJse l-og Tables, if necessary. Use of calculators is not allowed.
1. da (sol) 
glh-+d 
Gel) 
trT 
\rs-qqtsqrtruTt 
| 
1
Give one example each of sol and gel.
2. ftwftnaqris+ftiq{+erqw.tqiw+1fifiil+ffi 6}at errqrqs'ErBr*rrfuqrqmrt ? I
Which reducing agent is employed to get copper from the leached low grade copper
ore ?
3. Frq dtrou IUPAC 
qFT 
ftrdi :
cH.-9H-CHz-CHO
"l
NH2
Write the IUPAC name of the compound
cH"-cH-cH2-cHo
,l
NHz
4. rq 
oTr{€tq{i 
tsq-qffiM.) 
{ t 
q+{ qr 
efir*'qlqvftd 
t t
q-qr{ifu{d eiq p-qr{dtFfrm
Which of the following isomers is more volatile :
o-nitrophenol or p-nitrophenol ?
s. 
56 
rq lqDm H 
qr+ y{'Qffi{e' q{r} 
t I Tr 
tfv+*tq 
wr t}* t t
Some liquids on mixing form 'azeotropes'. What are 'azeotropes' ?
6. Frq 
q\ffi 
s) {6fi 
Ei^q{rfto,,,dr 
*-mq { 
qqfsm 
dfsr+ :
c6HsNH2, C6H5NHCH3' C6H5CHTM'
Arrange the following in increasing order of basic strength :
6H5NH2, 
C6H5NHCH3' C6H5CH2NH2
56m2 
'2
7. €d'ff dq 
qr 
trm'u-wtg 
+T vndq 
qrrot 
eil{=rm ii qfudq 
t r
Which component 
of starch is a branched polymer 
of o-glucose and insoluble in water ?
8. ftE{ {*,d { * 
qir 
wr €rftrn'en+ 
*il t 
ske} 
r
[Co(NH)6]3* +{ 
[Co(en)r]3+
Which of the following is more stable complex and why ?
[Co(NH)6]3* and 
[Co(en)r]3+
g. 
ffi urftqq fuI r loqft +fi s1ffi rn{ gdwfrildrq{ETqqH 
sr*Trwne*dr 
t r 2
State Henry's law. What is the effect of temperature on the solubility of a gas in a
liquid ?
10. frq 
EI si 
qftqrkd 
fr1Fr+ :
(i) oTFTTS 
@seudo) 
sEq dfe6t srfi{pmur 
r
(ii) 
ffi ernrfrqrm 
ertloro 
ltro).
Define the following terms :
(i) 
Pseudo fust order reaction
(ii) 
Half life period 
of reacrion (ty2).
I t. 
yilT{ 
firqrqf *t frrr frft{rrf + silqrw 
frqq ffi 
.
(i) 
rrqrkfr *qr 
Glydraulic washing)
(ii) 
ilwtFfr ltrrr (Vapourphaserefining)
write the principle 
behind the following methods of refining :
(i) . 
Hydraulic 
washing
(ii) 
Vapour phase 
refining
tz. Frr 
ii 
+ rer 
qfi{PsqT 
{ qp 
+ilH semot drqqr 
M :
(i) 
Gou 
soc/z'
(ii) 
GcHz- 
cH= cH2 +1s1 
ffi*,
Draw the structure of m1j9r monohalo product 
in each of the following reactions :
(i) 
GoH 
soc/2,
(ii) 
GcHz 
- 
cH = cH, + 
1191 
Peroxide,
2
)
s6tu2
lP.T.O.
13. (i) f=rng'q+st{*ntftmmtiflEsffi\fi tsiY{orfuq^dd S*2 
erftlmqltntr 
z
nn
Br 
l,
(a) (b)
(ii) tpa ferftrqi 
ii 
s*t ek s*z 
it 
* 
qil{ 
S 
srFltffir 
tt ft t
(a) fuqru 6t rfreil (inversion)
(b) tftrqtfi"r (Racemisation)
(i) Which alkyl halide from the following pair is chiral and undergoes faster S*2
reaction ?
n,\^
Br
(a) (b)
(ii) Out of S*1 and S*2, which reaction occurs with
(a) Inversion of configuration
(b) Racemisation
14. 
qr 
{rsrqFr*,'{FM +} gn *t :
(i) CarPr+ HrO 
->
(i0 Cu + HTSO.G{O 
->
s{slElt
frq 
q\tm'{ffi[ 
o] e=r*,'qrq ffi 
'gw 
sr{qn 
qqf*uiT 
s1H :
(i) HF, HCr, Hgr 
eiltru 
- 
{6fr g$ enc*r ffiqq 
tffi 
or{qr
(ii) H2O, H2S, HrSe 
eilc 
H 
zT" 
-T6fr Ei' 
eTIrfi Hsfrr 
3r1ur
Complete the following chemical equations':
(i) CarPr+ HrO -+
(ii) Cu + HrSOo(conc.) +
OR
Arrange the following in the order of property indicated against each set :
(i) HF, HC/, HBr, HI 
- 
increasing bond dissociation enthalpy.
(ii) H2O, HzS, HrSe, HrTe 
- 
increasing acidic character.
15. ri+"r 
tcr(xH 
3)4clzl+ 
ET IUPAC {rq fud r 
q6t{T 
rsnftt 
qrTr*{r+il 
(isomerism; tcumr
tt
Write the IUPAC name of the complex 
[Cr(NH3)aCl21+. 
What type of isomerism does
it exhibit ?
Page 5


Series : OSR/I
+nt.
Roll No.
fr?ttfu$qzt: 3 
qoq
Time allowed:3 hours 
l
fits'i.
Code No.
s6lu2
+tssi Efi
Tq-YlE
rr{ qErs 
flerii r
Candidates must write the Code on
the title page of the answer-book.
o 
Str-{r 
sirq 
+'rd flq,'vs 
qqtrr-Er 
{ 
Ilrf, 
ge 
11 t r
o Irsr-wr { 
qrf6+ 
6rq 6t sil{ fqq.rq 
qilsqq{s} 
urd ffi{-gks, *Ee-ys.nflad r
o gtrqrd,'qq,ri{t+'qsqq"r-Erii 
so snt r
o 
SrFlTtlFT6,rsir{frs{rvJ{"^6,r++qtrd, 
qf{6'rf,qi6^ 
wqqqftrd r
. 
Es trlcr-q:r si 
qo+ 
+ fdq 15 fiT{e 
irr 
{Er{r fEqr 
.rqr 
t r 
yqr-.H 
*r fl+etq gqlqr it 
to. ts 
qQ
f*qr 
qr+qT 
r 10.15 
qq 
t 10.30 
qQ 
aq; sa **o 
qsr-wr qfi 
Gil{ qs 
erqfrr + d{H * src-
gksTqr+ttr+rqtTfuidt 
r
o 
Please check that this question paper contains 11 printed pages.
o 
Code number given on the right hand side of the question paper should be written on the
title page of the answer-book by the candidate.
o 
Please check that this question paper contains 30 questions.
o 
Please write down the Serial Number of the question before attempting it.
I 
15 minutes time has been allotted to read this question paper. The question paper will be
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will only read the
question paper and will not write any answer on the answer-book during this period.
rqTFI"TfrTTl-q(+qrP,ffi)
CHEMISTRY (Theory)
nrm{frT+vr:
(i) afiswatMt r
(ii) vnr-viglrt dA aa-'arfr ag-eat\+rwS 1yfionw #forr 
,:r*,'i 
r
(iii) sFr-tiqr9 *rc d-aag-irmbrr+|. tsdrwr*fdqz er+-d- I
(iv) 
ymr<iqr 
t9 lzz tqtt? ag-eatfu rw t r s-d€y?a #frr<rt or+'* I
(v) 
yw-tiqrzt 
tso 
q?d-wtqrrs# 
rs-dtyw#ftzqrs eras I
(vi) 
qrqwadllsTrfrq*wif 
wsqhr n+ / 
@ 
#swhT+? etpfu 
m?* r
pftrqdq etq 
:70
I 
Maximum Marks : 70
s6fit2
[P.T.O.
General Instructions
(i) All questions are compulsory.
(ii) 
Question 
numbers 1 to I are very short-answer questions and carry 7 mark each.
(iii) 
Question 
numbers 9 to 18 are short-answer questions and carry 2 marks each.
(iv) 
Question 
numbers 19 to 27 are also short-answer questions and carry 3 marks
each.
(v) 
Question 
numbers 28 to 30 are long-answer questions and carry 5 marlcs each.
(vi) tJse l-og Tables, if necessary. Use of calculators is not allowed.
1. da (sol) 
glh-+d 
Gel) 
trT 
\rs-qqtsqrtruTt 
| 
1
Give one example each of sol and gel.
2. ftwftnaqris+ftiq{+erqw.tqiw+1fifiil+ffi 6}at errqrqs'ErBr*rrfuqrqmrt ? I
Which reducing agent is employed to get copper from the leached low grade copper
ore ?
3. Frq dtrou IUPAC 
qFT 
ftrdi :
cH.-9H-CHz-CHO
"l
NH2
Write the IUPAC name of the compound
cH"-cH-cH2-cHo
,l
NHz
4. rq 
oTr{€tq{i 
tsq-qffiM.) 
{ t 
q+{ qr 
efir*'qlqvftd 
t t
q-qr{ifu{d eiq p-qr{dtFfrm
Which of the following isomers is more volatile :
o-nitrophenol or p-nitrophenol ?
s. 
56 
rq lqDm H 
qr+ y{'Qffi{e' q{r} 
t I Tr 
tfv+*tq 
wr t}* t t
Some liquids on mixing form 'azeotropes'. What are 'azeotropes' ?
6. Frq 
q\ffi 
s) {6fi 
Ei^q{rfto,,,dr 
*-mq { 
qqfsm 
dfsr+ :
c6HsNH2, C6H5NHCH3' C6H5CHTM'
Arrange the following in increasing order of basic strength :
6H5NH2, 
C6H5NHCH3' C6H5CH2NH2
56m2 
'2
7. €d'ff dq 
qr 
trm'u-wtg 
+T vndq 
qrrot 
eil{=rm ii qfudq 
t r
Which component 
of starch is a branched polymer 
of o-glucose and insoluble in water ?
8. ftE{ {*,d { * 
qir 
wr €rftrn'en+ 
*il t 
ske} 
r
[Co(NH)6]3* +{ 
[Co(en)r]3+
Which of the following is more stable complex and why ?
[Co(NH)6]3* and 
[Co(en)r]3+
g. 
ffi urftqq fuI r loqft +fi s1ffi rn{ gdwfrildrq{ETqqH 
sr*Trwne*dr 
t r 2
State Henry's law. What is the effect of temperature on the solubility of a gas in a
liquid ?
10. frq 
EI si 
qftqrkd 
fr1Fr+ :
(i) oTFTTS 
@seudo) 
sEq dfe6t srfi{pmur 
r
(ii) 
ffi ernrfrqrm 
ertloro 
ltro).
Define the following terms :
(i) 
Pseudo fust order reaction
(ii) 
Half life period 
of reacrion (ty2).
I t. 
yilT{ 
firqrqf *t frrr frft{rrf + silqrw 
frqq ffi 
.
(i) 
rrqrkfr *qr 
Glydraulic washing)
(ii) 
ilwtFfr ltrrr (Vapourphaserefining)
write the principle 
behind the following methods of refining :
(i) . 
Hydraulic 
washing
(ii) 
Vapour phase 
refining
tz. Frr 
ii 
+ rer 
qfi{PsqT 
{ qp 
+ilH semot drqqr 
M :
(i) 
Gou 
soc/z'
(ii) 
GcHz- 
cH= cH2 +1s1 
ffi*,
Draw the structure of m1j9r monohalo product 
in each of the following reactions :
(i) 
GoH 
soc/2,
(ii) 
GcHz 
- 
cH = cH, + 
1191 
Peroxide,
2
)
s6tu2
lP.T.O.
13. (i) f=rng'q+st{*ntftmmtiflEsffi\fi tsiY{orfuq^dd S*2 
erftlmqltntr 
z
nn
Br 
l,
(a) (b)
(ii) tpa ferftrqi 
ii 
s*t ek s*z 
it 
* 
qil{ 
S 
srFltffir 
tt ft t
(a) fuqru 6t rfreil (inversion)
(b) tftrqtfi"r (Racemisation)
(i) Which alkyl halide from the following pair is chiral and undergoes faster S*2
reaction ?
n,\^
Br
(a) (b)
(ii) Out of S*1 and S*2, which reaction occurs with
(a) Inversion of configuration
(b) Racemisation
14. 
qr 
{rsrqFr*,'{FM +} gn *t :
(i) CarPr+ HrO 
->
(i0 Cu + HTSO.G{O 
->
s{slElt
frq 
q\tm'{ffi[ 
o] e=r*,'qrq ffi 
'gw 
sr{qn 
qqf*uiT 
s1H :
(i) HF, HCr, Hgr 
eiltru 
- 
{6fr g$ enc*r ffiqq 
tffi 
or{qr
(ii) H2O, H2S, HrSe 
eilc 
H 
zT" 
-T6fr Ei' 
eTIrfi Hsfrr 
3r1ur
Complete the following chemical equations':
(i) CarPr+ HrO -+
(ii) Cu + HrSOo(conc.) +
OR
Arrange the following in the order of property indicated against each set :
(i) HF, HC/, HBr, HI 
- 
increasing bond dissociation enthalpy.
(ii) H2O, HzS, HrSe, HrTe 
- 
increasing acidic character.
15. ri+"r 
tcr(xH 
3)4clzl+ 
ET IUPAC {rq fud r 
q6t{T 
rsnftt 
qrTr*{r+il 
(isomerism; tcumr
tt
Write the IUPAC name of the complex 
[Cr(NH3)aCl21+. 
What type of isomerism does
it exhibit ?
16. ll.2 gsm-3 
q{q 
sil{ 
+ x t0{ cm flsilt- 
q+ 
riqr$ sr 
\rs-EEr f.c.c. 
sncroq-{rdT 
t I 
gs 
itr
sr 
.r{qruF 
tsqrrrT 
qfrskd 
o1H r
(Ne 
= 
6.022 x 1023 ft1-t)
An element with density 11.2 gcm-3 forms a f.c.c. lattice with edge length of 4x l6rs cm.
Calculate the atomic mass of the element.
(Given 
: No 
= 
6.A22x 1023 mol-l)
B- A+
B-
A+
A+
B- A+
B-
B_ B- A+
t7 . 
qei 
M 
rr$ qren 
eftyyi. 
fr,-{To 
q,r 
fr+q{ur sr sTr+ 
Te 
T+ 
qqii 
+.g+{ flmi :
B- A+ B-
A+B-A+O
B_ A+ B_ A+ B-
(0 
{s fls{ffi Enr +{ 
qr rrFr ontr6 
GEfiftrfu dq fffiqr 
qrfrr 
t ?
(ii) 
Eq 
qlq 
*'onq fr-w *'weq 
qt 
P*'q ,FFR usTtrr rEilr t ?
(iii) fl+q rsr+'eilqfffiqqr{ 
tsr 
qtq 
fusri.t r
Examine the given defective crystal
A+ B- A+ B- A+
A+B-A+O
A+
B_ A+ B- A+ B-
Answer the following questions 
:
(i) 
What type of stoichiometric defect is shown by the crystal ?
(ii) 
How is the density of the crystal affected by this defect ?
(iii) What type of ionic substances show such defect ?
18. 
qfrqftm 
s1F{+ fu 3Trurq qqqm 
= 
256 g +fl-r * 
q}Frq- 
*t a;er+ 
qr*r 
+} zs
qlmrqr+fu'gtr+-A*rif 
o.+s Ksts*Elqr{ I 
Gq= 
s.r2Kkg+n-rr.
Calculate the mass of compound (molar 
mass 
= 
256 gmol-t) to be dissolved
benzene to lower its freezing point by 0.48 K (& 
= 
S.tZ K kg mol-l).
56fit2 
5
sffi{if
inT5gof
tP.T.O.