Past Year Paper, Chemistry (Set - 1 ), Delhi, 2014, Class 12, Chemistry Class 12 Notes | EduRev

Chemistry Class 12

Created by: Mohit Rajpoot

Class 12 : Past Year Paper, Chemistry (Set - 1 ), Delhi, 2014, Class 12, Chemistry Class 12 Notes | EduRev

 Page 1


fi
iirTi.
Roll No.
Series : OSR/I
*]*,. 
s6nn,
ffir-9fiffir *{e,
q{qEwirffi 
r
Candidates must write the Code on
the title page of the answer-book.
o 
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dq ffi d fu'eq s{q-rl:t { 
$qfr 
gsa 11 t r
o lrFr-rrir { ErF+ rrq +t eilt fqqrrq*ts;rrqr *l ur* rtrcgfir+t *{e-gua.n ffi r
o grrfi 
qiq 
*t d f+'Vq nFT-rEr { SO lrrq t r
r 
StrrfilrFtmvrrfrsqrvS66T++qtrd, 
svtclmqia^ wflqftrd I
o gt 
wT-rH st 
q6+ 
+ fdq 15 tne 
EFI 
TFrq flqqrrqr er fuarur 
Wlq{ 
ii 
to.ts 
qi
flq,,qr 
!ilr+'n 
r 10.15 Tq t 10.30 
ql 
a*"or* *m 
qsT-wr qtn 
et'{ qs erqftr + 
qkH 
t s+r-
yfiffirwettrirqaTfndi r
o 
Please check that this question paper contains 11 printed pages.
r 
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.
o 
15 minutes time has been allotted to read this question paper. The question paper will be
disfibuted 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.
Tqrq;Tfr{m@O
CHEMISTRY 
(Theory)
fuiffuerrt : 3 
qv*j yafuw etq 
:70
Timeallowed:3hours 
I t 
MaximumMarks:7O
snrr<r+qYr.
(i) wtlsw efqqzii r
(ii) vw-d@rl da aaerfr ag-rafuvwt tv-dqsw #ftryr ;ra& r
(iii) wld@rg *ra aoag-sadqsw* rsa*€frw*fu2 
erqr* I
(iv) sw-iqrlg tzr aqq1ag-mt+r'w t rv-dqvw #frrq's eiqt r
(v) sw-(i@rza *ro 
qlt-rmfrqvwt 
rs'dqs?a#ftzq's 
tiqt r
(vi) 
qrqwffiqstrdfuTfuitwyqfu 
*1 7 ffeyda<i *vqlrql 
aryqfu aaf* I
lP.T.O.
Page 2


fi
iirTi.
Roll No.
Series : OSR/I
*]*,. 
s6nn,
ffir-9fiffir *{e,
q{qEwirffi 
r
Candidates must write the Code on
the title page of the answer-book.
o 
![ttqt 
dq ffi d fu'eq s{q-rl:t { 
$qfr 
gsa 11 t r
o lrFr-rrir { ErF+ rrq +t eilt fqqrrq*ts;rrqr *l ur* rtrcgfir+t *{e-gua.n ffi r
o grrfi 
qiq 
*t d f+'Vq nFT-rEr { SO lrrq t r
r 
StrrfilrFtmvrrfrsqrvS66T++qtrd, 
svtclmqia^ wflqftrd I
o gt 
wT-rH st 
q6+ 
+ fdq 15 tne 
EFI 
TFrq flqqrrqr er fuarur 
Wlq{ 
ii 
to.ts 
qi
flq,,qr 
!ilr+'n 
r 10.15 Tq t 10.30 
ql 
a*"or* *m 
qsT-wr qtn 
et'{ qs erqftr + 
qkH 
t s+r-
yfiffirwettrirqaTfndi r
o 
Please check that this question paper contains 11 printed pages.
r 
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.
o 
15 minutes time has been allotted to read this question paper. The question paper will be
disfibuted 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.
Tqrq;Tfr{m@O
CHEMISTRY 
(Theory)
fuiffuerrt : 3 
qv*j yafuw etq 
:70
Timeallowed:3hours 
I t 
MaximumMarks:7O
snrr<r+qYr.
(i) wtlsw efqqzii r
(ii) vw-d@rl da aaerfr ag-rafuvwt tv-dqsw #ftryr ;ra& r
(iii) wld@rg *ra aoag-sadqsw* rsa*€frw*fu2 
erqr* I
(iv) sw-iqrlg tzr aqq1ag-mt+r'w t rv-dqvw #frrq's eiqt r
(v) sw-(i@rza *ro 
qlt-rmfrqvwt 
rs'dqs?a#ftzq's 
tiqt r
(vi) 
qrqwffiqstrdfuTfuitwyqfu 
*1 7 ffeyda<i *vqlrql 
aryqfu aaf* I
lP.T.O.
General Instructions :
(i) 
All questions are compulsory.
(ii) 
Question 
numbers I to I are very short-answer questions and carry I 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 i marks
each.
(v) 
Question 
numbers 28 to 30 are long-answer questions and carry 5 mnrks each.
(vi) Use Log Tables, if necessary. Use of calculators is not allowed.
1.'qfl 
i[ 
iH' eik'tm i[ srfr' 
]FFR *' 
qqer+t 
s'r 
gs-ttsgqrflur 
{H r
Give one example each of 'oil in water' and 'water in oil' emulsion.
2. foqfaaWns*qiw*sirg.t*ir{stHfu+Hqiq+ 
qqq'{*,,srnrq}rfuqrqmrt? 
1
Which reducing agent is employed to get copper from the leached low grade copper
ore ?
3. frTq ffi { t s}t {T €ifr{q^eTr+ 
6tdr t 
eilr 
wif r
[Co(NH3)6]3* 
oi{ 
[co(en)r]3+
Which of the following is more stable complex and why ?
[Co(NH)6]3+ 
and 
[Co(en)r]3+
4. 
rq dFIfi.Hr IUPAC {-IT ImK+ :
cHr-cH-cHr-COOH
I
OH
Write the IUPAC name of the compound.
cHr-cH-cHr-COOH
I
OH
5. Eq 
oTrq€tqti 
6*rn-emuHiy 
+ t st{ rn 
qftrm'qru{vflE 
t 
r
s-qr{dtr{'ffi efu p-qr{irftrilH
Which of the following isomers is more volatile :
o-nitrophenol or p-nitrophenol ?
6. vrrwrur$ (€HrEqi-dtfir) kmr{ xr di t' r
What are isotonic solutions ?
56tUt
Page 3


fi
iirTi.
Roll No.
Series : OSR/I
*]*,. 
s6nn,
ffir-9fiffir *{e,
q{qEwirffi 
r
Candidates must write the Code on
the title page of the answer-book.
o 
![ttqt 
dq ffi d fu'eq s{q-rl:t { 
$qfr 
gsa 11 t r
o lrFr-rrir { ErF+ rrq +t eilt fqqrrq*ts;rrqr *l ur* rtrcgfir+t *{e-gua.n ffi r
o grrfi 
qiq 
*t d f+'Vq nFT-rEr { SO lrrq t r
r 
StrrfilrFtmvrrfrsqrvS66T++qtrd, 
svtclmqia^ wflqftrd I
o gt 
wT-rH st 
q6+ 
+ fdq 15 tne 
EFI 
TFrq flqqrrqr er fuarur 
Wlq{ 
ii 
to.ts 
qi
flq,,qr 
!ilr+'n 
r 10.15 Tq t 10.30 
ql 
a*"or* *m 
qsT-wr qtn 
et'{ qs erqftr + 
qkH 
t s+r-
yfiffirwettrirqaTfndi r
o 
Please check that this question paper contains 11 printed pages.
r 
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.
o 
15 minutes time has been allotted to read this question paper. The question paper will be
disfibuted 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.
Tqrq;Tfr{m@O
CHEMISTRY 
(Theory)
fuiffuerrt : 3 
qv*j yafuw etq 
:70
Timeallowed:3hours 
I t 
MaximumMarks:7O
snrr<r+qYr.
(i) wtlsw efqqzii r
(ii) vw-d@rl da aaerfr ag-rafuvwt tv-dqsw #ftryr ;ra& r
(iii) wld@rg *ra aoag-sadqsw* rsa*€frw*fu2 
erqr* I
(iv) sw-iqrlg tzr aqq1ag-mt+r'w t rv-dqvw #frrq's eiqt r
(v) sw-(i@rza *ro 
qlt-rmfrqvwt 
rs'dqs?a#ftzq's 
tiqt r
(vi) 
qrqwffiqstrdfuTfuitwyqfu 
*1 7 ffeyda<i *vqlrql 
aryqfu aaf* I
lP.T.O.
General Instructions :
(i) 
All questions are compulsory.
(ii) 
Question 
numbers I to I are very short-answer questions and carry I 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 i marks
each.
(v) 
Question 
numbers 28 to 30 are long-answer questions and carry 5 mnrks each.
(vi) Use Log Tables, if necessary. Use of calculators is not allowed.
1.'qfl 
i[ 
iH' eik'tm i[ srfr' 
]FFR *' 
qqer+t 
s'r 
gs-ttsgqrflur 
{H r
Give one example each of 'oil in water' and 'water in oil' emulsion.
2. foqfaaWns*qiw*sirg.t*ir{stHfu+Hqiq+ 
qqq'{*,,srnrq}rfuqrqmrt? 
1
Which reducing agent is employed to get copper from the leached low grade copper
ore ?
3. frTq ffi { t s}t {T €ifr{q^eTr+ 
6tdr t 
eilr 
wif r
[Co(NH3)6]3* 
oi{ 
[co(en)r]3+
Which of the following is more stable complex and why ?
[Co(NH)6]3+ 
and 
[Co(en)r]3+
4. 
rq dFIfi.Hr IUPAC {-IT ImK+ :
cHr-cH-cHr-COOH
I
OH
Write the IUPAC name of the compound.
cHr-cH-cHr-COOH
I
OH
5. Eq 
oTrq€tqti 
6*rn-emuHiy 
+ t st{ rn 
qftrm'qru{vflE 
t 
r
s-qr{dtr{'ffi efu p-qr{irftrilH
Which of the following isomers is more volatile :
o-nitrophenol or p-nitrophenol ?
6. vrrwrur$ (€HrEqi-dtfir) kmr{ xr di t' r
What are isotonic solutions ?
56tUt
7. fiffi dffi 
q+ qr+{ 
Tr* goqvfr-dnr *'mc d 
q-cftqa 
61m :
C6H5NH2, (c2Hr2NH eftr 
crHrNtt,
Arrange the following compounds in increasing order of solubility in water :
c6HsNH2, (C2H,2NH, C2H5NH2
8. €d +qi st'il 
ii 
+ frt{ 
qI EreT ii 
ffi t}or t t
Which of the two components of starch is water soluble ?
9. ll.2 gcm-3 
qT€ 
etr + x 10{ cm ffi #t 
ff 
or 
qir.Htf 
f.c.c. 
afl?rcr 
rqrf,r t I 
{€ 
HEr
qrqrqruJu'qqrrmqfimitrdqfrH 
t 2
(Na 
= 
6'022 x 1023 fr6-t;
An element with density tl.2 gcm-3 forms a f.c.c. lattice with edge length of 4 x 10-8 cm.
Calculate the atomic mass of the element.
(Given : No 
= 
6.022x 1023 mol-l)
10. 
qfi 
M 
rr{ q+*qr 
€Fapi 
tx-w) 
q,r 
flTfrq{q H'{ sTri 
{& 
q+ 
eq+f *ffi{ ffi : 2
A+ B- A+ B- A+
B-OB-A+B-
A+B-A+0A+
B- A+ B- A+ B_
(i) 
Es 
fu€m Enr +{ HT 
qH 
B{rer*. 
GmaArft*o 
dq tqqqT 
qrer 
t r
(ii) 
Es iq *'qnor P*,w *'qqo 
tr{ 
fu€ Fnr wfltt 
qgdl 
t ?
(ii1 fus r+n*'silqk*.qEr{ tfir 
qiq 
Pqqr+ t t
Examine the given defective crystal
A+ B- A+ B- A+
B-OB-A+B_
A+B-A+0A+
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 ?
$fltfi 3 IP.T.O.
Page 4


fi
iirTi.
Roll No.
Series : OSR/I
*]*,. 
s6nn,
ffir-9fiffir *{e,
q{qEwirffi 
r
Candidates must write the Code on
the title page of the answer-book.
o 
![ttqt 
dq ffi d fu'eq s{q-rl:t { 
$qfr 
gsa 11 t r
o lrFr-rrir { ErF+ rrq +t eilt fqqrrq*ts;rrqr *l ur* rtrcgfir+t *{e-gua.n ffi r
o grrfi 
qiq 
*t d f+'Vq nFT-rEr { SO lrrq t r
r 
StrrfilrFtmvrrfrsqrvS66T++qtrd, 
svtclmqia^ wflqftrd I
o gt 
wT-rH st 
q6+ 
+ fdq 15 tne 
EFI 
TFrq flqqrrqr er fuarur 
Wlq{ 
ii 
to.ts 
qi
flq,,qr 
!ilr+'n 
r 10.15 Tq t 10.30 
ql 
a*"or* *m 
qsT-wr qtn 
et'{ qs erqftr + 
qkH 
t s+r-
yfiffirwettrirqaTfndi r
o 
Please check that this question paper contains 11 printed pages.
r 
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.
o 
15 minutes time has been allotted to read this question paper. The question paper will be
disfibuted 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.
Tqrq;Tfr{m@O
CHEMISTRY 
(Theory)
fuiffuerrt : 3 
qv*j yafuw etq 
:70
Timeallowed:3hours 
I t 
MaximumMarks:7O
snrr<r+qYr.
(i) wtlsw efqqzii r
(ii) vw-d@rl da aaerfr ag-rafuvwt tv-dqsw #ftryr ;ra& r
(iii) wld@rg *ra aoag-sadqsw* rsa*€frw*fu2 
erqr* I
(iv) sw-iqrlg tzr aqq1ag-mt+r'w t rv-dqvw #frrq's eiqt r
(v) sw-(i@rza *ro 
qlt-rmfrqvwt 
rs'dqs?a#ftzq's 
tiqt r
(vi) 
qrqwffiqstrdfuTfuitwyqfu 
*1 7 ffeyda<i *vqlrql 
aryqfu aaf* I
lP.T.O.
General Instructions :
(i) 
All questions are compulsory.
(ii) 
Question 
numbers I to I are very short-answer questions and carry I 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 i marks
each.
(v) 
Question 
numbers 28 to 30 are long-answer questions and carry 5 mnrks each.
(vi) Use Log Tables, if necessary. Use of calculators is not allowed.
1.'qfl 
i[ 
iH' eik'tm i[ srfr' 
]FFR *' 
qqer+t 
s'r 
gs-ttsgqrflur 
{H r
Give one example each of 'oil in water' and 'water in oil' emulsion.
2. foqfaaWns*qiw*sirg.t*ir{stHfu+Hqiq+ 
qqq'{*,,srnrq}rfuqrqmrt? 
1
Which reducing agent is employed to get copper from the leached low grade copper
ore ?
3. frTq ffi { t s}t {T €ifr{q^eTr+ 
6tdr t 
eilr 
wif r
[Co(NH3)6]3* 
oi{ 
[co(en)r]3+
Which of the following is more stable complex and why ?
[Co(NH)6]3+ 
and 
[Co(en)r]3+
4. 
rq dFIfi.Hr IUPAC {-IT ImK+ :
cHr-cH-cHr-COOH
I
OH
Write the IUPAC name of the compound.
cHr-cH-cHr-COOH
I
OH
5. Eq 
oTrq€tqti 
6*rn-emuHiy 
+ t st{ rn 
qftrm'qru{vflE 
t 
r
s-qr{dtr{'ffi efu p-qr{irftrilH
Which of the following isomers is more volatile :
o-nitrophenol or p-nitrophenol ?
6. vrrwrur$ (€HrEqi-dtfir) kmr{ xr di t' r
What are isotonic solutions ?
56tUt
7. fiffi dffi 
q+ qr+{ 
Tr* goqvfr-dnr *'mc d 
q-cftqa 
61m :
C6H5NH2, (c2Hr2NH eftr 
crHrNtt,
Arrange the following compounds in increasing order of solubility in water :
c6HsNH2, (C2H,2NH, C2H5NH2
8. €d +qi st'il 
ii 
+ frt{ 
qI EreT ii 
ffi t}or t t
Which of the two components of starch is water soluble ?
9. ll.2 gcm-3 
qT€ 
etr + x 10{ cm ffi #t 
ff 
or 
qir.Htf 
f.c.c. 
afl?rcr 
rqrf,r t I 
{€ 
HEr
qrqrqruJu'qqrrmqfimitrdqfrH 
t 2
(Na 
= 
6'022 x 1023 fr6-t;
An element with density tl.2 gcm-3 forms a f.c.c. lattice with edge length of 4 x 10-8 cm.
Calculate the atomic mass of the element.
(Given : No 
= 
6.022x 1023 mol-l)
10. 
qfi 
M 
rr{ q+*qr 
€Fapi 
tx-w) 
q,r 
flTfrq{q H'{ sTri 
{& 
q+ 
eq+f *ffi{ ffi : 2
A+ B- A+ B- A+
B-OB-A+B-
A+B-A+0A+
B- A+ B- A+ B_
(i) 
Es 
fu€m Enr +{ HT 
qH 
B{rer*. 
GmaArft*o 
dq tqqqT 
qrer 
t r
(ii) 
Es iq *'qnor P*,w *'qqo 
tr{ 
fu€ Fnr wfltt 
qgdl 
t ?
(ii1 fus r+n*'silqk*.qEr{ tfir 
qiq 
Pqqr+ t t
Examine the given defective crystal
A+ B- A+ B- A+
B-OB-A+B_
A+B-A+0A+
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 ?
$fltfi 3 IP.T.O.
n. 
qMmfr 
ftiH fu' oir"re 
rqqn 
= 
256 g dtrr +'q\Fffi ft1 fuir+ 
rTHr 
6t 75 g 
ffi{ {
qifir En+ 
fu'Es*-f6qi-qrrf o.+s K *t 
EF+ 
E+ 
qrA' 
r (r! 
= 
s.tzKkg futr. 2
Calculate the mass of compound (molar mass 
= 
256 gmol-l) to be dissolved in 75 gof
benzene to lower its freezing point by 0.48 K (& 
= 
5.tZ K kg mol-l).
t2. 
qra ernlt fl{dq{ 
q+ qftqr$ 
sil{{s*l*tttrofuqtsdr fttrd r
Define an ideal solution and write one of its characteristics.
I 3. aflItrqr *' *q (order) ett 
E{r*t 
srTurErfi (molecularity) + s}'t 
q} 
Qr.ffi ftfui t 2
Write two differences between 'order of reaction' and 'molecularity of reaction'.
14. urEeif *.yilqr *t FTrr frfriqi *. e+nrcfc frqq flfifis+ 
'
(i) 
=f* 
(*) 
qftFhn 
frfrT
(i0 altffifrfti
Outline the principles behind the refining of metals by the following methods :
(i) Zone refining method
(ii) Chromatographicmethod
15. 
ga q-ssfipn{r+dr{"if 
e} 
Trr 
*t :
(i) CarPr+ HrO 
->
(ii) Cu + HrSOo{utO 
->
g[?rdlT
fiTE{ 
q\trs q*it qi y+*- qrq 
ffi 
'1w 
eripn anafuro 
E1k+ :
(i) HF, HC/, Hsr drHI 
- 
EEfr g* err**r M-s{ 
tdet 
w{sr
(ii) H2O, H2S, HrSe dturTe 
-v6* 
g$ enm HqHr 
srEqr
Complete the following chemical equations :
(i) C\Pz+ HrO -+
(i0 Cu + HrSOo(conc.) -+
OR
Arrange the following in the order of property indicated against each set :
(i) HF, HCr, HBr, HI 
- 
increasing bond dissociation enthalpy.
(ii) H2O, H2S, HrSe, HrTe 
- 
increasing acidic character.
16. ri+"r 
1cr(xg 
3)4ct2i+ 
sT rupAC 
qrq 
fud r 16 flsq mnr +t rmtErqErff (isomerism) ftrcrdr
tt
Write the IUPAC name of the complex 
[Cr(NH)aCl21+. 
What type of isomerism does
it exhibit ?
Page 5


fi
iirTi.
Roll No.
Series : OSR/I
*]*,. 
s6nn,
ffir-9fiffir *{e,
q{qEwirffi 
r
Candidates must write the Code on
the title page of the answer-book.
o 
![ttqt 
dq ffi d fu'eq s{q-rl:t { 
$qfr 
gsa 11 t r
o lrFr-rrir { ErF+ rrq +t eilt fqqrrq*ts;rrqr *l ur* rtrcgfir+t *{e-gua.n ffi r
o grrfi 
qiq 
*t d f+'Vq nFT-rEr { SO lrrq t r
r 
StrrfilrFtmvrrfrsqrvS66T++qtrd, 
svtclmqia^ wflqftrd I
o gt 
wT-rH st 
q6+ 
+ fdq 15 tne 
EFI 
TFrq flqqrrqr er fuarur 
Wlq{ 
ii 
to.ts 
qi
flq,,qr 
!ilr+'n 
r 10.15 Tq t 10.30 
ql 
a*"or* *m 
qsT-wr qtn 
et'{ qs erqftr + 
qkH 
t s+r-
yfiffirwettrirqaTfndi r
o 
Please check that this question paper contains 11 printed pages.
r 
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.
o 
15 minutes time has been allotted to read this question paper. The question paper will be
disfibuted 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.
Tqrq;Tfr{m@O
CHEMISTRY 
(Theory)
fuiffuerrt : 3 
qv*j yafuw etq 
:70
Timeallowed:3hours 
I t 
MaximumMarks:7O
snrr<r+qYr.
(i) wtlsw efqqzii r
(ii) vw-d@rl da aaerfr ag-rafuvwt tv-dqsw #ftryr ;ra& r
(iii) wld@rg *ra aoag-sadqsw* rsa*€frw*fu2 
erqr* I
(iv) sw-iqrlg tzr aqq1ag-mt+r'w t rv-dqvw #frrq's eiqt r
(v) sw-(i@rza *ro 
qlt-rmfrqvwt 
rs'dqs?a#ftzq's 
tiqt r
(vi) 
qrqwffiqstrdfuTfuitwyqfu 
*1 7 ffeyda<i *vqlrql 
aryqfu aaf* I
lP.T.O.
General Instructions :
(i) 
All questions are compulsory.
(ii) 
Question 
numbers I to I are very short-answer questions and carry I 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 i marks
each.
(v) 
Question 
numbers 28 to 30 are long-answer questions and carry 5 mnrks each.
(vi) Use Log Tables, if necessary. Use of calculators is not allowed.
1.'qfl 
i[ 
iH' eik'tm i[ srfr' 
]FFR *' 
qqer+t 
s'r 
gs-ttsgqrflur 
{H r
Give one example each of 'oil in water' and 'water in oil' emulsion.
2. foqfaaWns*qiw*sirg.t*ir{stHfu+Hqiq+ 
qqq'{*,,srnrq}rfuqrqmrt? 
1
Which reducing agent is employed to get copper from the leached low grade copper
ore ?
3. frTq ffi { t s}t {T €ifr{q^eTr+ 
6tdr t 
eilr 
wif r
[Co(NH3)6]3* 
oi{ 
[co(en)r]3+
Which of the following is more stable complex and why ?
[Co(NH)6]3+ 
and 
[Co(en)r]3+
4. 
rq dFIfi.Hr IUPAC {-IT ImK+ :
cHr-cH-cHr-COOH
I
OH
Write the IUPAC name of the compound.
cHr-cH-cHr-COOH
I
OH
5. Eq 
oTrq€tqti 
6*rn-emuHiy 
+ t st{ rn 
qftrm'qru{vflE 
t 
r
s-qr{dtr{'ffi efu p-qr{irftrilH
Which of the following isomers is more volatile :
o-nitrophenol or p-nitrophenol ?
6. vrrwrur$ (€HrEqi-dtfir) kmr{ xr di t' r
What are isotonic solutions ?
56tUt
7. fiffi dffi 
q+ qr+{ 
Tr* goqvfr-dnr *'mc d 
q-cftqa 
61m :
C6H5NH2, (c2Hr2NH eftr 
crHrNtt,
Arrange the following compounds in increasing order of solubility in water :
c6HsNH2, (C2H,2NH, C2H5NH2
8. €d +qi st'il 
ii 
+ frt{ 
qI EreT ii 
ffi t}or t t
Which of the two components of starch is water soluble ?
9. ll.2 gcm-3 
qT€ 
etr + x 10{ cm ffi #t 
ff 
or 
qir.Htf 
f.c.c. 
afl?rcr 
rqrf,r t I 
{€ 
HEr
qrqrqruJu'qqrrmqfimitrdqfrH 
t 2
(Na 
= 
6'022 x 1023 fr6-t;
An element with density tl.2 gcm-3 forms a f.c.c. lattice with edge length of 4 x 10-8 cm.
Calculate the atomic mass of the element.
(Given : No 
= 
6.022x 1023 mol-l)
10. 
qfi 
M 
rr{ q+*qr 
€Fapi 
tx-w) 
q,r 
flTfrq{q H'{ sTri 
{& 
q+ 
eq+f *ffi{ ffi : 2
A+ B- A+ B- A+
B-OB-A+B-
A+B-A+0A+
B- A+ B- A+ B_
(i) 
Es 
fu€m Enr +{ HT 
qH 
B{rer*. 
GmaArft*o 
dq tqqqT 
qrer 
t r
(ii) 
Es iq *'qnor P*,w *'qqo 
tr{ 
fu€ Fnr wfltt 
qgdl 
t ?
(ii1 fus r+n*'silqk*.qEr{ tfir 
qiq 
Pqqr+ t t
Examine the given defective crystal
A+ B- A+ B- A+
B-OB-A+B_
A+B-A+0A+
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 ?
$fltfi 3 IP.T.O.
n. 
qMmfr 
ftiH fu' oir"re 
rqqn 
= 
256 g dtrr +'q\Fffi ft1 fuir+ 
rTHr 
6t 75 g 
ffi{ {
qifir En+ 
fu'Es*-f6qi-qrrf o.+s K *t 
EF+ 
E+ 
qrA' 
r (r! 
= 
s.tzKkg futr. 2
Calculate the mass of compound (molar mass 
= 
256 gmol-l) to be dissolved in 75 gof
benzene to lower its freezing point by 0.48 K (& 
= 
5.tZ K kg mol-l).
t2. 
qra ernlt fl{dq{ 
q+ qftqr$ 
sil{{s*l*tttrofuqtsdr fttrd r
Define an ideal solution and write one of its characteristics.
I 3. aflItrqr *' *q (order) ett 
E{r*t 
srTurErfi (molecularity) + s}'t 
q} 
Qr.ffi ftfui t 2
Write two differences between 'order of reaction' and 'molecularity of reaction'.
14. urEeif *.yilqr *t FTrr frfriqi *. e+nrcfc frqq flfifis+ 
'
(i) 
=f* 
(*) 
qftFhn 
frfrT
(i0 altffifrfti
Outline the principles behind the refining of metals by the following methods :
(i) Zone refining method
(ii) Chromatographicmethod
15. 
ga q-ssfipn{r+dr{"if 
e} 
Trr 
*t :
(i) CarPr+ HrO 
->
(ii) Cu + HrSOo{utO 
->
g[?rdlT
fiTE{ 
q\trs q*it qi y+*- qrq 
ffi 
'1w 
eripn anafuro 
E1k+ :
(i) HF, HC/, Hsr drHI 
- 
EEfr g* err**r M-s{ 
tdet 
w{sr
(ii) H2O, H2S, HrSe dturTe 
-v6* 
g$ enm HqHr 
srEqr
Complete the following chemical equations :
(i) C\Pz+ HrO -+
(i0 Cu + HrSOo(conc.) -+
OR
Arrange the following in the order of property indicated against each set :
(i) HF, HCr, HBr, HI 
- 
increasing bond dissociation enthalpy.
(ii) H2O, H2S, HrSe, HrTe 
- 
increasing acidic character.
16. ri+"r 
1cr(xg 
3)4ct2i+ 
sT rupAC 
qrq 
fud r 16 flsq mnr +t rmtErqErff (isomerism) ftrcrdr
tt
Write the IUPAC name of the complex 
[Cr(NH)aCl21+. 
What type of isomerism does
it exhibit ?
L7 . (i) fua gr t 
qir qr 
tka i-ifl{ststiT t 
Gil{ erRr*.+{ 
s*z 
orF+fuur 
tar t z z
nn
(a) 
Br 
a;
(ii) Frrr ftxftrqt { s*t *r s*z { t 
qt{ 
rft 
Brfth.qr 
at fr t
(a) kqrg Et wrerlT (inversion)
(b) iftr+fiwr(Racemisation)
(i) Which alkyl halide from the following pair is chiral and undergoes faster S*2
reaction ?
nA 
\n
Brl
Br
(a) (b)
(ii) Out of S*1 and S*2, which reaction occurs with
(a) Inversionofconfiguration
(b) Racemisation
18. frq { t ur+o srfi{hqr if 
xgq 
qtritd 
31q1q6t i{{fir M :
(i) 
o_ou 
so%,
(ii) 
O-cHz-cH:cH'+1*' 
ffi'
Draw the structure of major monohalo product in each of the following reactions :
(i) 
O-ou 
s9c4 
'
(ii) 
GcHz 
- 
CH: CH2 
+ HBr 
Peroxide'
19. (a) steisfu{r erftNilqur €rdrfr *. ffi ulq 
qruT q{ 
Nt + 
qftNilsrur 
+ fu+ 
qqio.{ur
fed r
(b) ffitrk+.ria +t 
r'* 
te{iqffi kri r
(c) r+1Fr-d srcrsTr + m."it *^ snqn 
q{ 
{dkd (associated) 
qEt-ifl?rs 
ek 
W+rrTq 
+fl?rg
inq6-qs'Bqrflsr{ffi 
r 3
(a) In reference to Freundlich adsorption isotherm write the expression for
adsorption of gases on solids in the form of an equation.
O) 
Write an important characteristic of lyophilic sols.
(c) Based on type of particles of dispersed phase, give one example each of
associated colloid and multimolecular colloid.
S6lUt s tp.T.O.
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