CBSE Board Paper 2020 | Chemistry Class 12 - NEET PDF Download

 Page 1


 
 .56/1/1 1 P.T.O. 
narjmWu H$moS >H$mo CÎma-nwpñVH$m Ho$ _wI-n¥ð 
>na Adí` {bIo§ & 
Candidates must write the Code on the 
title page of the answer-book. 
   H$moS> Z§.  
   
 
 
Code No. 
amob Z§. 
Roll No. 
 
 
 
 
ZmoQ> 
 NOTE 
(I) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV 
n¥ð> 19 h¢ & 
(I) Please check that this question 
paper contains 19 printed pages. 
(II) 
àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE H$moS 
>Zå~a H$mo N>mÌ CÎma-nwpñVH$m Ho$ _wI-n¥ð> na 
{bI| & 
(II) 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. 
(III) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _|  
>37 àíZ h¢ & 
(III) Please check that this question 
paper contains 37 questions. 
(IV) 
H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go 
nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ 
Adí` {bI| &  
(IV) Please write down the Serial 
Number of the question in the 
answer-book before attempting it. 
(V) 
Bg  àíZ-nÌ  H$mo n‹T>Zo Ho$ {bE 15 {_ZQ >H$m 
g_` {X`m J`m h¡ &  àíZ-nÌ H$m {dVaU 
nydm©• _| 10.15 ~Oo {H$`m OmEJm &   
10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db 
àíZ-nÌ H$mo n‹T>|Jo Am¡a Bg Ad{Y Ho$ Xm¡amZ 
do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo & 
(V) 15 minute 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  
read the question paper only and  
will not write any answer on the 
answer-book during this period. 
 agm`Z {dkmZ (g¡ÕmpÝVH$)  
CHEMISTRY (Theory)  
{ZYm©[aV g_` : 3 KÊQ>o   A{YH$V_ A§H$ : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
56/1/1
 
Page 2


 
 .56/1/1 1 P.T.O. 
narjmWu H$moS >H$mo CÎma-nwpñVH$m Ho$ _wI-n¥ð 
>na Adí` {bIo§ & 
Candidates must write the Code on the 
title page of the answer-book. 
   H$moS> Z§.  
   
 
 
Code No. 
amob Z§. 
Roll No. 
 
 
 
 
ZmoQ> 
 NOTE 
(I) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV 
n¥ð> 19 h¢ & 
(I) Please check that this question 
paper contains 19 printed pages. 
(II) 
àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE H$moS 
>Zå~a H$mo N>mÌ CÎma-nwpñVH$m Ho$ _wI-n¥ð> na 
{bI| & 
(II) 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. 
(III) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _|  
>37 àíZ h¢ & 
(III) Please check that this question 
paper contains 37 questions. 
(IV) 
H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go 
nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ 
Adí` {bI| &  
(IV) Please write down the Serial 
Number of the question in the 
answer-book before attempting it. 
(V) 
Bg  àíZ-nÌ  H$mo n‹T>Zo Ho$ {bE 15 {_ZQ >H$m 
g_` {X`m J`m h¡ &  àíZ-nÌ H$m {dVaU 
nydm©• _| 10.15 ~Oo {H$`m OmEJm &   
10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db 
àíZ-nÌ H$mo n‹T>|Jo Am¡a Bg Ad{Y Ho$ Xm¡amZ 
do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo & 
(V) 15 minute 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  
read the question paper only and  
will not write any answer on the 
answer-book during this period. 
 agm`Z {dkmZ (g¡ÕmpÝVH$)  
CHEMISTRY (Theory)  
{ZYm©[aV g_` : 3 KÊQ>o   A{YH$V_ A§H$ : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
56/1/1
 
 
 .56/1/1 2 
gm_mÝ` {ZX}e : 
{ZåZ{b{IV {ZX}em| H$mo ~hþV gmdYmZr go n{‹T>E Am¡a CZH$m g™Vr go nmbZ H$s{OE : 
(i) `h àíZ-nÌ Mma IÊS>m| _| {d^m{OV {H$`m J`m h¡ – H$, I, J Ed§ K & Bg àíZ-nÌ _|  
37 àíZ h¢ & g^r  àíZ A{Zdm`© h¢ & 
(ii) IÊS> H$ _| àíZ g§»`m 1 go 20 VH$ A{V bKw-CÎmar` àH$ma Ho$ àíZ h¢, àË`oH$ àíZ 1 A§H$ H$m 
h¡ & àË`oH$ àíZ H$m CÎma EH$ eãX `m EH$ dmŠ` _| Xr{OE & 
(iii) IÊS> I _| àíZ g§»`m 21 go 27 VH$ bKw-CÎmar` àH$ma Ho$ àíZ h¢, àË`oH$ àíZ 2 A§H$m| H$m  
h¡ &  
(iv) IÊS> J _| àíZ g§»`m 28 go 34 VH$ XrK©-CÎmar` àH$ma-I Ho$ àíZ h¢, àË`oH$ àíZ 3 A§H$m| H$m  
h¡ &  
(v) IÊS> K _| àíZ g§»`m 35 go 37 VH$ XrK©-CÎmar` àH$ma-II Ho$ àíZ h¢, àË`oH$ àíZ 5 A§H$m| H$m  
h¡ &  
(vi) àíZ-nÌ _| H$moB© g_J« {dH$ën Zht h¡ & VWm{n, Xmo-Xmo A§H$m| Ho$ Xmo àíZm| _|, VrZ-VrZ A§H$m| Hoo$ 
Xmo àíZm| _| VWm nm±M-nm±M A§H$m| Ho$ VrZm| àíZm| _| AmÝV[aH$ {dH$ën {X`m J`m h¡ & Eogo àíZm| _| 
go Ho$db EH$ hr {dH$ën H$m CÎma Xr{OE &  
(vii) BgHo$ A{V[aº$, Amdí`H$VmZwgma, àË`oH$ IÊS> Am¡a àíZ Ho$ gmW `Wmo{MV {ZX}e {XE JE h¢ &  
(viii) Ho$ëHw$boQ>a AWdm bm°J Q>o~b Ho$ à`moJ H$s AZw_{V Zht h¡ & 
IÊS> H$ 
 {XE JE AZwÀN>oX H$mo n{‹T>E VWm àíZ g§»`m 1 go 5 Ho$ CÎma Xr{OE : 1 ?5=5 
 EopëH$b h¡bmBS>m| H$s à{VñWmnZ A{^{H«$`m _w»`V`m S
N
1 AWdm S
N
2 {H«$`m{d{Y Ûmam 
hmoVr h¡ & à{VñWmnZ A{^{H«$`mE± hmoZo Ho$ {bE EopëH$b h¡bmBS> {H$gr ^r {H«$`m{d{Y H$mo 
AnZmE±, CZHo$ {bE H$m~©Z h¡bmoOZ Am~ÝY H$s Y«wdUVm hr CÎmaXm`r hmoVr h¡ & S
N
1 
A{^{H«$`mAm| H$m doJ H$m~m}H¡$Q>m`Z Ho$ ñWm{`Ëd na {Z^©a H$aVm h¡ O~{H$ S
N
2 
A{^{H«$`mAm| H$m {Ì{d_{dÝ`mg H$maH$ na & `{X Amapå^H$ nXmW© {H$aob `m¡{JH$ hmo, Vmo 
CËnmX `m Vmo à{Vbmo{_V hmoJm AWdm ao{g{_H$ {_lU, Omo EopëH$b h¡bmBS>m| Ûmam AnZmB© JB© 
{H«$`m{d{Y Ho$ àH$ma na {Z^©a H$aVm h¡ & B©Wam| H$m HI go {dXbZ ^r {Ì{d_{dÝ`mg H$maH$ 
Am¡a H$m~m}H¡$Q>m`Z Ho$ ñWm{`Ëd go {Z`pÝÌV hmoVm h¡, Omo Bg ~mV H$m ÚmoVH$ h¡ {H$ H$m~©{ZH$ 
agm`Z _| `hr Xmo à_wI H$maH$ h¢ Omo h_| ghm`Vm H$aVo h¢ {H$ CËnmX {H$g àH$ma H$m  
~ZoJm ?  
Page 3


 
 .56/1/1 1 P.T.O. 
narjmWu H$moS >H$mo CÎma-nwpñVH$m Ho$ _wI-n¥ð 
>na Adí` {bIo§ & 
Candidates must write the Code on the 
title page of the answer-book. 
   H$moS> Z§.  
   
 
 
Code No. 
amob Z§. 
Roll No. 
 
 
 
 
ZmoQ> 
 NOTE 
(I) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV 
n¥ð> 19 h¢ & 
(I) Please check that this question 
paper contains 19 printed pages. 
(II) 
àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE H$moS 
>Zå~a H$mo N>mÌ CÎma-nwpñVH$m Ho$ _wI-n¥ð> na 
{bI| & 
(II) 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. 
(III) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _|  
>37 àíZ h¢ & 
(III) Please check that this question 
paper contains 37 questions. 
(IV) 
H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go 
nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ 
Adí` {bI| &  
(IV) Please write down the Serial 
Number of the question in the 
answer-book before attempting it. 
(V) 
Bg  àíZ-nÌ  H$mo n‹T>Zo Ho$ {bE 15 {_ZQ >H$m 
g_` {X`m J`m h¡ &  àíZ-nÌ H$m {dVaU 
nydm©• _| 10.15 ~Oo {H$`m OmEJm &   
10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db 
àíZ-nÌ H$mo n‹T>|Jo Am¡a Bg Ad{Y Ho$ Xm¡amZ 
do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo & 
(V) 15 minute 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  
read the question paper only and  
will not write any answer on the 
answer-book during this period. 
 agm`Z {dkmZ (g¡ÕmpÝVH$)  
CHEMISTRY (Theory)  
{ZYm©[aV g_` : 3 KÊQ>o   A{YH$V_ A§H$ : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
56/1/1
 
 
 .56/1/1 2 
gm_mÝ` {ZX}e : 
{ZåZ{b{IV {ZX}em| H$mo ~hþV gmdYmZr go n{‹T>E Am¡a CZH$m g™Vr go nmbZ H$s{OE : 
(i) `h àíZ-nÌ Mma IÊS>m| _| {d^m{OV {H$`m J`m h¡ – H$, I, J Ed§ K & Bg àíZ-nÌ _|  
37 àíZ h¢ & g^r  àíZ A{Zdm`© h¢ & 
(ii) IÊS> H$ _| àíZ g§»`m 1 go 20 VH$ A{V bKw-CÎmar` àH$ma Ho$ àíZ h¢, àË`oH$ àíZ 1 A§H$ H$m 
h¡ & àË`oH$ àíZ H$m CÎma EH$ eãX `m EH$ dmŠ` _| Xr{OE & 
(iii) IÊS> I _| àíZ g§»`m 21 go 27 VH$ bKw-CÎmar` àH$ma Ho$ àíZ h¢, àË`oH$ àíZ 2 A§H$m| H$m  
h¡ &  
(iv) IÊS> J _| àíZ g§»`m 28 go 34 VH$ XrK©-CÎmar` àH$ma-I Ho$ àíZ h¢, àË`oH$ àíZ 3 A§H$m| H$m  
h¡ &  
(v) IÊS> K _| àíZ g§»`m 35 go 37 VH$ XrK©-CÎmar` àH$ma-II Ho$ àíZ h¢, àË`oH$ àíZ 5 A§H$m| H$m  
h¡ &  
(vi) àíZ-nÌ _| H$moB© g_J« {dH$ën Zht h¡ & VWm{n, Xmo-Xmo A§H$m| Ho$ Xmo àíZm| _|, VrZ-VrZ A§H$m| Hoo$ 
Xmo àíZm| _| VWm nm±M-nm±M A§H$m| Ho$ VrZm| àíZm| _| AmÝV[aH$ {dH$ën {X`m J`m h¡ & Eogo àíZm| _| 
go Ho$db EH$ hr {dH$ën H$m CÎma Xr{OE &  
(vii) BgHo$ A{V[aº$, Amdí`H$VmZwgma, àË`oH$ IÊS> Am¡a àíZ Ho$ gmW `Wmo{MV {ZX}e {XE JE h¢ &  
(viii) Ho$ëHw$boQ>a AWdm bm°J Q>o~b Ho$ à`moJ H$s AZw_{V Zht h¡ & 
IÊS> H$ 
 {XE JE AZwÀN>oX H$mo n{‹T>E VWm àíZ g§»`m 1 go 5 Ho$ CÎma Xr{OE : 1 ?5=5 
 EopëH$b h¡bmBS>m| H$s à{VñWmnZ A{^{H«$`m _w»`V`m S
N
1 AWdm S
N
2 {H«$`m{d{Y Ûmam 
hmoVr h¡ & à{VñWmnZ A{^{H«$`mE± hmoZo Ho$ {bE EopëH$b h¡bmBS> {H$gr ^r {H«$`m{d{Y H$mo 
AnZmE±, CZHo$ {bE H$m~©Z h¡bmoOZ Am~ÝY H$s Y«wdUVm hr CÎmaXm`r hmoVr h¡ & S
N
1 
A{^{H«$`mAm| H$m doJ H$m~m}H¡$Q>m`Z Ho$ ñWm{`Ëd na {Z^©a H$aVm h¡ O~{H$ S
N
2 
A{^{H«$`mAm| H$m {Ì{d_{dÝ`mg H$maH$ na & `{X Amapå^H$ nXmW© {H$aob `m¡{JH$ hmo, Vmo 
CËnmX `m Vmo à{Vbmo{_V hmoJm AWdm ao{g{_H$ {_lU, Omo EopëH$b h¡bmBS>m| Ûmam AnZmB© JB© 
{H«$`m{d{Y Ho$ àH$ma na {Z^©a H$aVm h¡ & B©Wam| H$m HI go {dXbZ ^r {Ì{d_{dÝ`mg H$maH$ 
Am¡a H$m~m}H¡$Q>m`Z Ho$ ñWm{`Ëd go {Z`pÝÌV hmoVm h¡, Omo Bg ~mV H$m ÚmoVH$ h¡ {H$ H$m~©{ZH$ 
agm`Z _| `hr Xmo à_wI H$maH$ h¢ Omo h_| ghm`Vm H$aVo h¢ {H$ CËnmX {H$g àH$ma H$m  
~ZoJm ?  
 
 .56/1/1 3 P.T.O. 
General Instructions : 
Read the following instructions very carefully and strictly follow them : 
(i) This question paper comprises four Sections – A, B, C and D. There are  
37 questions in the question paper. All questions are compulsory.  
(ii) Section A – Questions no. 1 to 20 are very short answer type questions, 
carrying 1 mark each. Answer these questions in one word or one sentence. 
(iii) Section B – Questions no. 21 to 27 are short answer type questions, carrying  
2 marks each.  
(iv) Section C – Questions no. 28 to 34 are long answer type-I questions, carrying  
3 marks each.  
(v) Section D – Questions no. 35 to 37 are long answer type-II questions, carrying  
5 marks each.  
(vi) There is no overall choice in the question paper. However, an internal choice 
has been provided in 2 questions of two marks, 2 questions of three marks and 
all the 3 questions of five marks. You have to attempt only one of the choices in 
such questions.  
(vii) In addition to this, separate instructions are given with each section and 
question, wherever necessary. 
(viii) Use of calculators and log tables is not permitted. 
SECTION A 
 Read the given passage and answer the questions number 1 to 5 that follow :  1 ?5=5 
 The substitution reaction of alkyl halide mainly occurs by S
N
1 or S
N
2 
mechanism. Whatever mechanism alkyl halides follow for the 
substitution reaction to occur, the polarity of the carbon halogen bond is 
responsible for these substitution reactions. The rate of S
N
1 reactions are 
governed by the stability of carbocation whereas for S
N
2 reactions steric 
factor is the deciding factor. If the starting material is a chiral compound, 
we may end up with an inverted product or racemic mixture depending 
upon the type of mechanism followed by alkyl halide. Cleavage of ethers 
with HI is also governed by steric factor and stability of carbocation, 
which indicates that in organic chemistry, these two major factors help 
us in deciding the kind of product formed.  
Page 4


 
 .56/1/1 1 P.T.O. 
narjmWu H$moS >H$mo CÎma-nwpñVH$m Ho$ _wI-n¥ð 
>na Adí` {bIo§ & 
Candidates must write the Code on the 
title page of the answer-book. 
   H$moS> Z§.  
   
 
 
Code No. 
amob Z§. 
Roll No. 
 
 
 
 
ZmoQ> 
 NOTE 
(I) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV 
n¥ð> 19 h¢ & 
(I) Please check that this question 
paper contains 19 printed pages. 
(II) 
àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE H$moS 
>Zå~a H$mo N>mÌ CÎma-nwpñVH$m Ho$ _wI-n¥ð> na 
{bI| & 
(II) 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. 
(III) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _|  
>37 àíZ h¢ & 
(III) Please check that this question 
paper contains 37 questions. 
(IV) 
H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go 
nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ 
Adí` {bI| &  
(IV) Please write down the Serial 
Number of the question in the 
answer-book before attempting it. 
(V) 
Bg  àíZ-nÌ  H$mo n‹T>Zo Ho$ {bE 15 {_ZQ >H$m 
g_` {X`m J`m h¡ &  àíZ-nÌ H$m {dVaU 
nydm©• _| 10.15 ~Oo {H$`m OmEJm &   
10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db 
àíZ-nÌ H$mo n‹T>|Jo Am¡a Bg Ad{Y Ho$ Xm¡amZ 
do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo & 
(V) 15 minute 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  
read the question paper only and  
will not write any answer on the 
answer-book during this period. 
 agm`Z {dkmZ (g¡ÕmpÝVH$)  
CHEMISTRY (Theory)  
{ZYm©[aV g_` : 3 KÊQ>o   A{YH$V_ A§H$ : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
56/1/1
 
 
 .56/1/1 2 
gm_mÝ` {ZX}e : 
{ZåZ{b{IV {ZX}em| H$mo ~hþV gmdYmZr go n{‹T>E Am¡a CZH$m g™Vr go nmbZ H$s{OE : 
(i) `h àíZ-nÌ Mma IÊS>m| _| {d^m{OV {H$`m J`m h¡ – H$, I, J Ed§ K & Bg àíZ-nÌ _|  
37 àíZ h¢ & g^r  àíZ A{Zdm`© h¢ & 
(ii) IÊS> H$ _| àíZ g§»`m 1 go 20 VH$ A{V bKw-CÎmar` àH$ma Ho$ àíZ h¢, àË`oH$ àíZ 1 A§H$ H$m 
h¡ & àË`oH$ àíZ H$m CÎma EH$ eãX `m EH$ dmŠ` _| Xr{OE & 
(iii) IÊS> I _| àíZ g§»`m 21 go 27 VH$ bKw-CÎmar` àH$ma Ho$ àíZ h¢, àË`oH$ àíZ 2 A§H$m| H$m  
h¡ &  
(iv) IÊS> J _| àíZ g§»`m 28 go 34 VH$ XrK©-CÎmar` àH$ma-I Ho$ àíZ h¢, àË`oH$ àíZ 3 A§H$m| H$m  
h¡ &  
(v) IÊS> K _| àíZ g§»`m 35 go 37 VH$ XrK©-CÎmar` àH$ma-II Ho$ àíZ h¢, àË`oH$ àíZ 5 A§H$m| H$m  
h¡ &  
(vi) àíZ-nÌ _| H$moB© g_J« {dH$ën Zht h¡ & VWm{n, Xmo-Xmo A§H$m| Ho$ Xmo àíZm| _|, VrZ-VrZ A§H$m| Hoo$ 
Xmo àíZm| _| VWm nm±M-nm±M A§H$m| Ho$ VrZm| àíZm| _| AmÝV[aH$ {dH$ën {X`m J`m h¡ & Eogo àíZm| _| 
go Ho$db EH$ hr {dH$ën H$m CÎma Xr{OE &  
(vii) BgHo$ A{V[aº$, Amdí`H$VmZwgma, àË`oH$ IÊS> Am¡a àíZ Ho$ gmW `Wmo{MV {ZX}e {XE JE h¢ &  
(viii) Ho$ëHw$boQ>a AWdm bm°J Q>o~b Ho$ à`moJ H$s AZw_{V Zht h¡ & 
IÊS> H$ 
 {XE JE AZwÀN>oX H$mo n{‹T>E VWm àíZ g§»`m 1 go 5 Ho$ CÎma Xr{OE : 1 ?5=5 
 EopëH$b h¡bmBS>m| H$s à{VñWmnZ A{^{H«$`m _w»`V`m S
N
1 AWdm S
N
2 {H«$`m{d{Y Ûmam 
hmoVr h¡ & à{VñWmnZ A{^{H«$`mE± hmoZo Ho$ {bE EopëH$b h¡bmBS> {H$gr ^r {H«$`m{d{Y H$mo 
AnZmE±, CZHo$ {bE H$m~©Z h¡bmoOZ Am~ÝY H$s Y«wdUVm hr CÎmaXm`r hmoVr h¡ & S
N
1 
A{^{H«$`mAm| H$m doJ H$m~m}H¡$Q>m`Z Ho$ ñWm{`Ëd na {Z^©a H$aVm h¡ O~{H$ S
N
2 
A{^{H«$`mAm| H$m {Ì{d_{dÝ`mg H$maH$ na & `{X Amapå^H$ nXmW© {H$aob `m¡{JH$ hmo, Vmo 
CËnmX `m Vmo à{Vbmo{_V hmoJm AWdm ao{g{_H$ {_lU, Omo EopëH$b h¡bmBS>m| Ûmam AnZmB© JB© 
{H«$`m{d{Y Ho$ àH$ma na {Z^©a H$aVm h¡ & B©Wam| H$m HI go {dXbZ ^r {Ì{d_{dÝ`mg H$maH$ 
Am¡a H$m~m}H¡$Q>m`Z Ho$ ñWm{`Ëd go {Z`pÝÌV hmoVm h¡, Omo Bg ~mV H$m ÚmoVH$ h¡ {H$ H$m~©{ZH$ 
agm`Z _| `hr Xmo à_wI H$maH$ h¢ Omo h_| ghm`Vm H$aVo h¢ {H$ CËnmX {H$g àH$ma H$m  
~ZoJm ?  
 
 .56/1/1 3 P.T.O. 
General Instructions : 
Read the following instructions very carefully and strictly follow them : 
(i) This question paper comprises four Sections – A, B, C and D. There are  
37 questions in the question paper. All questions are compulsory.  
(ii) Section A – Questions no. 1 to 20 are very short answer type questions, 
carrying 1 mark each. Answer these questions in one word or one sentence. 
(iii) Section B – Questions no. 21 to 27 are short answer type questions, carrying  
2 marks each.  
(iv) Section C – Questions no. 28 to 34 are long answer type-I questions, carrying  
3 marks each.  
(v) Section D – Questions no. 35 to 37 are long answer type-II questions, carrying  
5 marks each.  
(vi) There is no overall choice in the question paper. However, an internal choice 
has been provided in 2 questions of two marks, 2 questions of three marks and 
all the 3 questions of five marks. You have to attempt only one of the choices in 
such questions.  
(vii) In addition to this, separate instructions are given with each section and 
question, wherever necessary. 
(viii) Use of calculators and log tables is not permitted. 
SECTION A 
 Read the given passage and answer the questions number 1 to 5 that follow :  1 ?5=5 
 The substitution reaction of alkyl halide mainly occurs by S
N
1 or S
N
2 
mechanism. Whatever mechanism alkyl halides follow for the 
substitution reaction to occur, the polarity of the carbon halogen bond is 
responsible for these substitution reactions. The rate of S
N
1 reactions are 
governed by the stability of carbocation whereas for S
N
2 reactions steric 
factor is the deciding factor. If the starting material is a chiral compound, 
we may end up with an inverted product or racemic mixture depending 
upon the type of mechanism followed by alkyl halide. Cleavage of ethers 
with HI is also governed by steric factor and stability of carbocation, 
which indicates that in organic chemistry, these two major factors help 
us in deciding the kind of product formed.  
 
 .56/1/1 4 
1. ~ZZo dmbo CËnmX H$s {Ì{d_agm`Z H$s àmJw{º$ H$s{OE `{X H$moB© Y«wdU KyU©H$ (àH$meV: 
g{H«$`) EopëH$b h¡bmBS> S
N
1 {H«$`m{d{Y go à{VñWmnZ A{^{H«$`m gånÞ H$aVm h¡ &  
2. Cg `§Ì H$m Zm_ ~VmBE Omo Cg H$moU Ho$ _mnZ Ho$ {bE à`wº$ hmoVm h¡ {Og na g_Vb 
Y«w{dV àH$me Ky{U©V hmo OmVm h¡ &   
3. _w»` CËnmX H$s àmJw{º$ H$s{OE O~ 2-~«mo_monoÝQ>oZ, EoëH$mohm°br KOH Ho$ gmW A{^{H«$`m 
H$aVm h¡ &  
4. CHI
3
 H$m EH$ Cn`moJ Xr{OE &  
5. CZ CËnmXm| H$s g§aMZmE± {b{IE O~ Eo{Zgmob H$mo HI Ho$ gmW A{^{H«${`V {H$`m OmVm h¡ &  
àíZ g§»`m 6 go 10 EH$ eãX CÎmar¶ h¢ : 1 ?5=5 
6. `{X Ðd A Am¡a B Ho$ ŠdWZm§H$ H«$_e: 140 ?C Am¡a 180 ?C h¢, Vmo Cg Ðd H$s nhMmZ 
H$s{OE {OgH$m 90 ?C na dmîn Xm~ CƒVa hmoJm &  
7. bmoho H$s dñVwAm| H$mo gwa{jV aIZo Ho$ {bE qµOH$ VWm {Q>Z _| go {H$gH$s H$moqQ>J ~ohVa h¡ ?  
8. Š`m {H$gr A{^{H«$`m H$m doJ pñWam§H$ T na {Z^©a H$aoJm `{X A{^{H«$`m H$s E
act
 (g{H«$`U 
D$Om©) eyÝ` hmo ?  
9. PVC Ho$ EH$bH$ H$s g§aMZm Xr{OE &  
10. {H$gr An_mO©H$ _| CnpñWV H$m¡Z-gr g§aMZmË_H$ BH$mB© CgH$mo AO¡d{ZåZrH$aUr` ~Zm XoVr 
h¡ ?   
àíZ g§»`m 11 go 15 ~hþ{dH$ënr¶ àíZ h¢ : 1 ?5=5 
11. Obr` {db`Z _| {ZåZ{b{IV _| go à~bV_ jma h¡   
(A) _o{WbEo_rZ 
(B) S>mB_o{WbEo_rZ  
(C) Q´>mB_o{WbEo_rZ 
(D) Eo{ZbrZ 
Page 5


 
 .56/1/1 1 P.T.O. 
narjmWu H$moS >H$mo CÎma-nwpñVH$m Ho$ _wI-n¥ð 
>na Adí` {bIo§ & 
Candidates must write the Code on the 
title page of the answer-book. 
   H$moS> Z§.  
   
 
 
Code No. 
amob Z§. 
Roll No. 
 
 
 
 
ZmoQ> 
 NOTE 
(I) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV 
n¥ð> 19 h¢ & 
(I) Please check that this question 
paper contains 19 printed pages. 
(II) 
àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE H$moS 
>Zå~a H$mo N>mÌ CÎma-nwpñVH$m Ho$ _wI-n¥ð> na 
{bI| & 
(II) 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. 
(III) 
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _|  
>37 àíZ h¢ & 
(III) Please check that this question 
paper contains 37 questions. 
(IV) 
H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go 
nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ 
Adí` {bI| &  
(IV) Please write down the Serial 
Number of the question in the 
answer-book before attempting it. 
(V) 
Bg  àíZ-nÌ  H$mo n‹T>Zo Ho$ {bE 15 {_ZQ >H$m 
g_` {X`m J`m h¡ &  àíZ-nÌ H$m {dVaU 
nydm©• _| 10.15 ~Oo {H$`m OmEJm &   
10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db 
àíZ-nÌ H$mo n‹T>|Jo Am¡a Bg Ad{Y Ho$ Xm¡amZ 
do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo & 
(V) 15 minute 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  
read the question paper only and  
will not write any answer on the 
answer-book during this period. 
 agm`Z {dkmZ (g¡ÕmpÝVH$)  
CHEMISTRY (Theory)  
{ZYm©[aV g_` : 3 KÊQ>o   A{YH$V_ A§H$ : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
56/1/1
 
 
 .56/1/1 2 
gm_mÝ` {ZX}e : 
{ZåZ{b{IV {ZX}em| H$mo ~hþV gmdYmZr go n{‹T>E Am¡a CZH$m g™Vr go nmbZ H$s{OE : 
(i) `h àíZ-nÌ Mma IÊS>m| _| {d^m{OV {H$`m J`m h¡ – H$, I, J Ed§ K & Bg àíZ-nÌ _|  
37 àíZ h¢ & g^r  àíZ A{Zdm`© h¢ & 
(ii) IÊS> H$ _| àíZ g§»`m 1 go 20 VH$ A{V bKw-CÎmar` àH$ma Ho$ àíZ h¢, àË`oH$ àíZ 1 A§H$ H$m 
h¡ & àË`oH$ àíZ H$m CÎma EH$ eãX `m EH$ dmŠ` _| Xr{OE & 
(iii) IÊS> I _| àíZ g§»`m 21 go 27 VH$ bKw-CÎmar` àH$ma Ho$ àíZ h¢, àË`oH$ àíZ 2 A§H$m| H$m  
h¡ &  
(iv) IÊS> J _| àíZ g§»`m 28 go 34 VH$ XrK©-CÎmar` àH$ma-I Ho$ àíZ h¢, àË`oH$ àíZ 3 A§H$m| H$m  
h¡ &  
(v) IÊS> K _| àíZ g§»`m 35 go 37 VH$ XrK©-CÎmar` àH$ma-II Ho$ àíZ h¢, àË`oH$ àíZ 5 A§H$m| H$m  
h¡ &  
(vi) àíZ-nÌ _| H$moB© g_J« {dH$ën Zht h¡ & VWm{n, Xmo-Xmo A§H$m| Ho$ Xmo àíZm| _|, VrZ-VrZ A§H$m| Hoo$ 
Xmo àíZm| _| VWm nm±M-nm±M A§H$m| Ho$ VrZm| àíZm| _| AmÝV[aH$ {dH$ën {X`m J`m h¡ & Eogo àíZm| _| 
go Ho$db EH$ hr {dH$ën H$m CÎma Xr{OE &  
(vii) BgHo$ A{V[aº$, Amdí`H$VmZwgma, àË`oH$ IÊS> Am¡a àíZ Ho$ gmW `Wmo{MV {ZX}e {XE JE h¢ &  
(viii) Ho$ëHw$boQ>a AWdm bm°J Q>o~b Ho$ à`moJ H$s AZw_{V Zht h¡ & 
IÊS> H$ 
 {XE JE AZwÀN>oX H$mo n{‹T>E VWm àíZ g§»`m 1 go 5 Ho$ CÎma Xr{OE : 1 ?5=5 
 EopëH$b h¡bmBS>m| H$s à{VñWmnZ A{^{H«$`m _w»`V`m S
N
1 AWdm S
N
2 {H«$`m{d{Y Ûmam 
hmoVr h¡ & à{VñWmnZ A{^{H«$`mE± hmoZo Ho$ {bE EopëH$b h¡bmBS> {H$gr ^r {H«$`m{d{Y H$mo 
AnZmE±, CZHo$ {bE H$m~©Z h¡bmoOZ Am~ÝY H$s Y«wdUVm hr CÎmaXm`r hmoVr h¡ & S
N
1 
A{^{H«$`mAm| H$m doJ H$m~m}H¡$Q>m`Z Ho$ ñWm{`Ëd na {Z^©a H$aVm h¡ O~{H$ S
N
2 
A{^{H«$`mAm| H$m {Ì{d_{dÝ`mg H$maH$ na & `{X Amapå^H$ nXmW© {H$aob `m¡{JH$ hmo, Vmo 
CËnmX `m Vmo à{Vbmo{_V hmoJm AWdm ao{g{_H$ {_lU, Omo EopëH$b h¡bmBS>m| Ûmam AnZmB© JB© 
{H«$`m{d{Y Ho$ àH$ma na {Z^©a H$aVm h¡ & B©Wam| H$m HI go {dXbZ ^r {Ì{d_{dÝ`mg H$maH$ 
Am¡a H$m~m}H¡$Q>m`Z Ho$ ñWm{`Ëd go {Z`pÝÌV hmoVm h¡, Omo Bg ~mV H$m ÚmoVH$ h¡ {H$ H$m~©{ZH$ 
agm`Z _| `hr Xmo à_wI H$maH$ h¢ Omo h_| ghm`Vm H$aVo h¢ {H$ CËnmX {H$g àH$ma H$m  
~ZoJm ?  
 
 .56/1/1 3 P.T.O. 
General Instructions : 
Read the following instructions very carefully and strictly follow them : 
(i) This question paper comprises four Sections – A, B, C and D. There are  
37 questions in the question paper. All questions are compulsory.  
(ii) Section A – Questions no. 1 to 20 are very short answer type questions, 
carrying 1 mark each. Answer these questions in one word or one sentence. 
(iii) Section B – Questions no. 21 to 27 are short answer type questions, carrying  
2 marks each.  
(iv) Section C – Questions no. 28 to 34 are long answer type-I questions, carrying  
3 marks each.  
(v) Section D – Questions no. 35 to 37 are long answer type-II questions, carrying  
5 marks each.  
(vi) There is no overall choice in the question paper. However, an internal choice 
has been provided in 2 questions of two marks, 2 questions of three marks and 
all the 3 questions of five marks. You have to attempt only one of the choices in 
such questions.  
(vii) In addition to this, separate instructions are given with each section and 
question, wherever necessary. 
(viii) Use of calculators and log tables is not permitted. 
SECTION A 
 Read the given passage and answer the questions number 1 to 5 that follow :  1 ?5=5 
 The substitution reaction of alkyl halide mainly occurs by S
N
1 or S
N
2 
mechanism. Whatever mechanism alkyl halides follow for the 
substitution reaction to occur, the polarity of the carbon halogen bond is 
responsible for these substitution reactions. The rate of S
N
1 reactions are 
governed by the stability of carbocation whereas for S
N
2 reactions steric 
factor is the deciding factor. If the starting material is a chiral compound, 
we may end up with an inverted product or racemic mixture depending 
upon the type of mechanism followed by alkyl halide. Cleavage of ethers 
with HI is also governed by steric factor and stability of carbocation, 
which indicates that in organic chemistry, these two major factors help 
us in deciding the kind of product formed.  
 
 .56/1/1 4 
1. ~ZZo dmbo CËnmX H$s {Ì{d_agm`Z H$s àmJw{º$ H$s{OE `{X H$moB© Y«wdU KyU©H$ (àH$meV: 
g{H«$`) EopëH$b h¡bmBS> S
N
1 {H«$`m{d{Y go à{VñWmnZ A{^{H«$`m gånÞ H$aVm h¡ &  
2. Cg `§Ì H$m Zm_ ~VmBE Omo Cg H$moU Ho$ _mnZ Ho$ {bE à`wº$ hmoVm h¡ {Og na g_Vb 
Y«w{dV àH$me Ky{U©V hmo OmVm h¡ &   
3. _w»` CËnmX H$s àmJw{º$ H$s{OE O~ 2-~«mo_monoÝQ>oZ, EoëH$mohm°br KOH Ho$ gmW A{^{H«$`m 
H$aVm h¡ &  
4. CHI
3
 H$m EH$ Cn`moJ Xr{OE &  
5. CZ CËnmXm| H$s g§aMZmE± {b{IE O~ Eo{Zgmob H$mo HI Ho$ gmW A{^{H«${`V {H$`m OmVm h¡ &  
àíZ g§»`m 6 go 10 EH$ eãX CÎmar¶ h¢ : 1 ?5=5 
6. `{X Ðd A Am¡a B Ho$ ŠdWZm§H$ H«$_e: 140 ?C Am¡a 180 ?C h¢, Vmo Cg Ðd H$s nhMmZ 
H$s{OE {OgH$m 90 ?C na dmîn Xm~ CƒVa hmoJm &  
7. bmoho H$s dñVwAm| H$mo gwa{jV aIZo Ho$ {bE qµOH$ VWm {Q>Z _| go {H$gH$s H$moqQ>J ~ohVa h¡ ?  
8. Š`m {H$gr A{^{H«$`m H$m doJ pñWam§H$ T na {Z^©a H$aoJm `{X A{^{H«$`m H$s E
act
 (g{H«$`U 
D$Om©) eyÝ` hmo ?  
9. PVC Ho$ EH$bH$ H$s g§aMZm Xr{OE &  
10. {H$gr An_mO©H$ _| CnpñWV H$m¡Z-gr g§aMZmË_H$ BH$mB© CgH$mo AO¡d{ZåZrH$aUr` ~Zm XoVr 
h¡ ?   
àíZ g§»`m 11 go 15 ~hþ{dH$ënr¶ àíZ h¢ : 1 ?5=5 
11. Obr` {db`Z _| {ZåZ{b{IV _| go à~bV_ jma h¡   
(A) _o{WbEo_rZ 
(B) S>mB_o{WbEo_rZ  
(C) Q´>mB_o{WbEo_rZ 
(D) Eo{ZbrZ 
 
 .56/1/1 5 P.T.O. 
1. Predict the stereochemistry of the product formed if an optically active 
alkyl halide undergoes substitution reaction by S
N
1
 
mechanism.  
2. Name the instrument used for measuring the angle by which the plane 
polarised light is rotated.   
3. Predict the major product formed when 2-Bromopentane reacts with 
alcoholic KOH.  
4. Give one use of CHI
3
.  
5. Write the structures of the products formed when anisole is treated with 
HI.    
Questions number 6 to 10 are one word answers : 1 ?5=5 
6. Identify which liquid will have a higher vapour pressure at 90 ?C if the 
boiling points of two liquids A and B are 140 ?C and 180 ?C, respectively.   
7. Out of zinc and tin, whose coating is better to protect iron objects ?  
8. Will the rate constant of the reaction depend upon T if the E
act
 
(activation energy) of the reaction is zero ?  
9. Give the structure of the monomer of PVC.  
10. Which structural unit present in a detergent makes it non-biodegradable ?  
Questions number 11 to 15 are multiple choice questions : 1 ?5=5  
11. Out of the following, the strongest base in aqueous solution is   
(A) Methylamine 
(B) Dimethylamine  
(C) Trimethylamine 
(D) Aniline