Science 2023 Compartment Exams Set-2 | Past Year Papers for Class 10 PDF Download

 Page 1


 
31/C/2 H 1 H P.T.O. 
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code 
on the title page of the answer-book. 
 Series Z1XYW/C  SET ~2 
  àíZ-nÌ H$moS>  
   
 
 
Q.P. Code 
amob Z§. 
Roll No. 
 
 
 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 27 h¢ & 
 àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE àíZ-nÌ H$moS> H$mo narjmWu CÎma-nwpñVH$m 
Ho$ _wI-n¥ð> na {bI| & 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| 39 àíZ h¢ & 
 H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ Adí` 
{bI| & 
 Bg  àíZ-nÌ  15 {_ZQ >H$m g_` {X`m J`m h¡ &  àíZ-nÌ H$m 
10.15 ~Oo {H$`m OmEJm &  10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ 
Ho$db àíZ- -nwpñVH$m na H$moB© CÎma 
Zht {bI|Jo & 
 Please check that this question paper contains 27 printed pages. 
 Q.P. Code given on the right hand side of the question paper should be written 
on the title page of the answer-book by the candidate. 
 Please check that this question paper contains 39 questions. 
 Please write down the serial number of the question in the answer-book before 
attempting it. 
 15 minute time has been allotted to read this question paper. The question 
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the 
students will read the question paper only and will not write any answer on the 
answer-book during this period. 
{dkmZ  
SCIENCE 
{ZYm©[aV g_` : 3 KÊQ>o A{YH$V_ A§H$ : 80 
Time allowed : 3 hours Maximum Marks : 80 
31/C/2
 
* 
^ 
Page 2


 
31/C/2 H 1 H P.T.O. 
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code 
on the title page of the answer-book. 
 Series Z1XYW/C  SET ~2 
  àíZ-nÌ H$moS>  
   
 
 
Q.P. Code 
amob Z§. 
Roll No. 
 
 
 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 27 h¢ & 
 àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE àíZ-nÌ H$moS> H$mo narjmWu CÎma-nwpñVH$m 
Ho$ _wI-n¥ð> na {bI| & 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| 39 àíZ h¢ & 
 H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ Adí` 
{bI| & 
 Bg  àíZ-nÌ  15 {_ZQ >H$m g_` {X`m J`m h¡ &  àíZ-nÌ H$m 
10.15 ~Oo {H$`m OmEJm &  10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ 
Ho$db àíZ- -nwpñVH$m na H$moB© CÎma 
Zht {bI|Jo & 
 Please check that this question paper contains 27 printed pages. 
 Q.P. Code given on the right hand side of the question paper should be written 
on the title page of the answer-book by the candidate. 
 Please check that this question paper contains 39 questions. 
 Please write down the serial number of the question in the answer-book before 
attempting it. 
 15 minute time has been allotted to read this question paper. The question 
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the 
students will read the question paper only and will not write any answer on the 
answer-book during this period. 
{dkmZ  
SCIENCE 
{ZYm©[aV g_` : 3 KÊQ>o A{YH$V_ A§H$ : 80 
Time allowed : 3 hours Maximum Marks : 80 
31/C/2
 
* 
^ 
 
31/C/2 H 2 H 
: 
: 
(i) 39 
(ii)  
(iii) 1 20 1 
(iv) 21 26 2 
30 50 
(v) 27 33 3 
50 80 
(vi) 34 36 5 
80 120 
(vii) 37 39 3 
(viii) 
IÊS> H$ 
20 1 20 20 1=20 
1. 2 g nrbo gë\$a nmCS>a H$mo {H$gr Mm`Zm {S>e _| Obm`m J`m Am¡a {ZH$bo YwE± H$mo EH$ 
naIZbr _| EH$Ì {H$`m J`m & Bg naIZbr _| Ob S>mbm J`m Am¡a Bg àH$ma ~Zo {db`Z 
H$m narjU n¥WH$-n¥WH$ ê$n go Zrbo Am¡a bmb {bQ>_g nÌm| Ho$ gmW {H$`m J`m & ghr 
{dH$ën Mw{ZE : 
(a) Zrbm {bQ>_g Zrbm ahVm h¡ Am¡a bmb {bQ>_g Zrbm hmo OmVm h¡ & 
(b) Zrbm {bQ>_g bmb hmo OmVm h¡ Am¡a bmb {bQ>_g bmb hr ahVm h¡ & 
(c) Zrbm {bQ>_g bmb hmo OmVm h¡ Am¡a bmb {bQ>_g Zrbm hmo OmVm h¡ & 
(d) Zrbm {bQ>_g Zrbm hr ahVm h¡ Am¡a bmb {bQ>_g bmb hr ahVm h¡ & 
Page 3


 
31/C/2 H 1 H P.T.O. 
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code 
on the title page of the answer-book. 
 Series Z1XYW/C  SET ~2 
  àíZ-nÌ H$moS>  
   
 
 
Q.P. Code 
amob Z§. 
Roll No. 
 
 
 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 27 h¢ & 
 àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE àíZ-nÌ H$moS> H$mo narjmWu CÎma-nwpñVH$m 
Ho$ _wI-n¥ð> na {bI| & 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| 39 àíZ h¢ & 
 H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ Adí` 
{bI| & 
 Bg  àíZ-nÌ  15 {_ZQ >H$m g_` {X`m J`m h¡ &  àíZ-nÌ H$m 
10.15 ~Oo {H$`m OmEJm &  10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ 
Ho$db àíZ- -nwpñVH$m na H$moB© CÎma 
Zht {bI|Jo & 
 Please check that this question paper contains 27 printed pages. 
 Q.P. Code given on the right hand side of the question paper should be written 
on the title page of the answer-book by the candidate. 
 Please check that this question paper contains 39 questions. 
 Please write down the serial number of the question in the answer-book before 
attempting it. 
 15 minute time has been allotted to read this question paper. The question 
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the 
students will read the question paper only and will not write any answer on the 
answer-book during this period. 
{dkmZ  
SCIENCE 
{ZYm©[aV g_` : 3 KÊQ>o A{YH$V_ A§H$ : 80 
Time allowed : 3 hours Maximum Marks : 80 
31/C/2
 
* 
^ 
 
31/C/2 H 2 H 
: 
: 
(i) 39 
(ii)  
(iii) 1 20 1 
(iv) 21 26 2 
30 50 
(v) 27 33 3 
50 80 
(vi) 34 36 5 
80 120 
(vii) 37 39 3 
(viii) 
IÊS> H$ 
20 1 20 20 1=20 
1. 2 g nrbo gë\$a nmCS>a H$mo {H$gr Mm`Zm {S>e _| Obm`m J`m Am¡a {ZH$bo YwE± H$mo EH$ 
naIZbr _| EH$Ì {H$`m J`m & Bg naIZbr _| Ob S>mbm J`m Am¡a Bg àH$ma ~Zo {db`Z 
H$m narjU n¥WH$-n¥WH$ ê$n go Zrbo Am¡a bmb {bQ>_g nÌm| Ho$ gmW {H$`m J`m & ghr 
{dH$ën Mw{ZE : 
(a) Zrbm {bQ>_g Zrbm ahVm h¡ Am¡a bmb {bQ>_g Zrbm hmo OmVm h¡ & 
(b) Zrbm {bQ>_g bmb hmo OmVm h¡ Am¡a bmb {bQ>_g bmb hr ahVm h¡ & 
(c) Zrbm {bQ>_g bmb hmo OmVm h¡ Am¡a bmb {bQ>_g Zrbm hmo OmVm h¡ & 
(d) Zrbm {bQ>_g Zrbm hr ahVm h¡ Am¡a bmb {bQ>_g bmb hr ahVm h¡ & 
 
31/C/2 H 3 H P.T.O. 
General Instructions : 
Read the following instructions very carefully and strictly follow them : 
(i) This question paper comprises 39 questions. All questions are compulsory. 
(ii) This question paper is divided into five sections  A, B, C, D and E. 
(iii) Section A  Questions No. 1 to 20 are multiple choice questions. Each question 
carries 1 mark.  
(iv) Section B  Questions No. 21 to 26 are very short answer type questions. Each 
question carries 2 marks. Answer to these questions should be in the range of 
30 to 50 words.  
(v) Section C  Questions No. 27 to 33 are short answer type questions. Each 
question carries 3 marks. Answer to these questions should in the range of  
50 to 80 words.  
(vi) Section D  Questions No. 34 to 36 are long answer type questions. Each 
question carries 5 marks. Answer to these questions should be in the range of 
80 to 120 words.  
(vii) Section E  Questions No. 37 to 39 are of 3 source-based/case-based units of 
assessment carrying 4 marks each with sub-parts. 
(viii) There is no overall choice. However, an internal choice has been provided in  
some sections. Only one of the alternatives has to be attempted in such 
questions. 
SECTION A 
This section has 20 multiple choice questions (Q.No. 1  20). All questions are 
compulsory.  20 1=20 
1. 2 g of yellow sulphur powder is burnt in a china dish and the fumes are 
collected in a test tube. Water is added in the test tube and the solution is 
tested separately with blue and red litmus paper. The correct option is : 
(a) Blue litmus remains blue and red litmus turns blue. 
(b) Blue litmus turns red and red litmus remains red. 
(c) Blue litmus turns red and red litmus turns blue. 
(d) Blue litmus remains blue and red litmus remains red. 
Page 4


 
31/C/2 H 1 H P.T.O. 
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code 
on the title page of the answer-book. 
 Series Z1XYW/C  SET ~2 
  àíZ-nÌ H$moS>  
   
 
 
Q.P. Code 
amob Z§. 
Roll No. 
 
 
 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 27 h¢ & 
 àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE àíZ-nÌ H$moS> H$mo narjmWu CÎma-nwpñVH$m 
Ho$ _wI-n¥ð> na {bI| & 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| 39 àíZ h¢ & 
 H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ Adí` 
{bI| & 
 Bg  àíZ-nÌ  15 {_ZQ >H$m g_` {X`m J`m h¡ &  àíZ-nÌ H$m 
10.15 ~Oo {H$`m OmEJm &  10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ 
Ho$db àíZ- -nwpñVH$m na H$moB© CÎma 
Zht {bI|Jo & 
 Please check that this question paper contains 27 printed pages. 
 Q.P. Code given on the right hand side of the question paper should be written 
on the title page of the answer-book by the candidate. 
 Please check that this question paper contains 39 questions. 
 Please write down the serial number of the question in the answer-book before 
attempting it. 
 15 minute time has been allotted to read this question paper. The question 
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the 
students will read the question paper only and will not write any answer on the 
answer-book during this period. 
{dkmZ  
SCIENCE 
{ZYm©[aV g_` : 3 KÊQ>o A{YH$V_ A§H$ : 80 
Time allowed : 3 hours Maximum Marks : 80 
31/C/2
 
* 
^ 
 
31/C/2 H 2 H 
: 
: 
(i) 39 
(ii)  
(iii) 1 20 1 
(iv) 21 26 2 
30 50 
(v) 27 33 3 
50 80 
(vi) 34 36 5 
80 120 
(vii) 37 39 3 
(viii) 
IÊS> H$ 
20 1 20 20 1=20 
1. 2 g nrbo gë\$a nmCS>a H$mo {H$gr Mm`Zm {S>e _| Obm`m J`m Am¡a {ZH$bo YwE± H$mo EH$ 
naIZbr _| EH$Ì {H$`m J`m & Bg naIZbr _| Ob S>mbm J`m Am¡a Bg àH$ma ~Zo {db`Z 
H$m narjU n¥WH$-n¥WH$ ê$n go Zrbo Am¡a bmb {bQ>_g nÌm| Ho$ gmW {H$`m J`m & ghr 
{dH$ën Mw{ZE : 
(a) Zrbm {bQ>_g Zrbm ahVm h¡ Am¡a bmb {bQ>_g Zrbm hmo OmVm h¡ & 
(b) Zrbm {bQ>_g bmb hmo OmVm h¡ Am¡a bmb {bQ>_g bmb hr ahVm h¡ & 
(c) Zrbm {bQ>_g bmb hmo OmVm h¡ Am¡a bmb {bQ>_g Zrbm hmo OmVm h¡ & 
(d) Zrbm {bQ>_g Zrbm hr ahVm h¡ Am¡a bmb {bQ>_g bmb hr ahVm h¡ & 
 
31/C/2 H 3 H P.T.O. 
General Instructions : 
Read the following instructions very carefully and strictly follow them : 
(i) This question paper comprises 39 questions. All questions are compulsory. 
(ii) This question paper is divided into five sections  A, B, C, D and E. 
(iii) Section A  Questions No. 1 to 20 are multiple choice questions. Each question 
carries 1 mark.  
(iv) Section B  Questions No. 21 to 26 are very short answer type questions. Each 
question carries 2 marks. Answer to these questions should be in the range of 
30 to 50 words.  
(v) Section C  Questions No. 27 to 33 are short answer type questions. Each 
question carries 3 marks. Answer to these questions should in the range of  
50 to 80 words.  
(vi) Section D  Questions No. 34 to 36 are long answer type questions. Each 
question carries 5 marks. Answer to these questions should be in the range of 
80 to 120 words.  
(vii) Section E  Questions No. 37 to 39 are of 3 source-based/case-based units of 
assessment carrying 4 marks each with sub-parts. 
(viii) There is no overall choice. However, an internal choice has been provided in  
some sections. Only one of the alternatives has to be attempted in such 
questions. 
SECTION A 
This section has 20 multiple choice questions (Q.No. 1  20). All questions are 
compulsory.  20 1=20 
1. 2 g of yellow sulphur powder is burnt in a china dish and the fumes are 
collected in a test tube. Water is added in the test tube and the solution is 
tested separately with blue and red litmus paper. The correct option is : 
(a) Blue litmus remains blue and red litmus turns blue. 
(b) Blue litmus turns red and red litmus remains red. 
(c) Blue litmus turns red and red litmus turns blue. 
(d) Blue litmus remains blue and red litmus remains red. 
 
31/C/2 H 4 H 
2. Amn Ob H$s H$R>moaVm H$m narjU H$aZm MmhVo h¢, naÝVw AmnH$s à`moJembm _| H$R>moa Ob 
CnbãY Zht h¡ & {ZåZ{b{IV _| go {H$Z `m¡{JH$m| H$mo ewÕ Ob _| KmobH$a Ob H$mo H$R>moa 
~Zm`m Om gH$Vm h¡ ?   
(i) gmo{S>`_ H$m hmBS´>moOZ H$m~m©oZoQ> 
(ii) _¡½Zr{e`_ H$m gë\oo$Q> 
(iii)  
(iv) gmo{S>`_ H$m H$m~m©oZoQ> 
(a) (i) Am¡a (ii)  
(b) (ii) Am¡a (iii) 
(c) (iii) Am¡a (iv) 
(d) (i) Am¡a (iv) 
3. Ob Ho$ {dÚwV-AnKQ>Z _| `{X EZmoS> na EH${ÌV J¡g H$m Ðì`_mZ m
a
 Am¡a H¡$WmoS> na 
EH${ÌV J¡g H$m Ðì`_mZ m
c
 h¡, Vmo (m
c
/m
a
) H$m _mZ hmoJm :
(a) 8 (b) 16 
(c) 
16
1
 (d) 
8
1
 
4. ZrMo {XE JE nXmWmªo na {dMma H$s{OE : 
(i) AåbrH¥$V K
2
Cr
2
O
7
 
(ii) jmar` KMnO
4
 
(iii)  
(iv) hmBS´>moOZ 
BZ_| go gm_mÝ`V:  (CnMm`r EOoÝQ>) h¢ : 
(a) Ho$db (i) Am¡a (ii) 
(b) Ho$db (ii) Am¡a (iii) 
(c) (i), (ii) Am¡a (iii) 
(d) (i), (ii) Am¡a (iv) 
Page 5


 
31/C/2 H 1 H P.T.O. 
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code 
on the title page of the answer-book. 
 Series Z1XYW/C  SET ~2 
  àíZ-nÌ H$moS>  
   
 
 
Q.P. Code 
amob Z§. 
Roll No. 
 
 
 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 27 h¢ & 
 àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE àíZ-nÌ H$moS> H$mo narjmWu CÎma-nwpñVH$m 
Ho$ _wI-n¥ð> na {bI| & 
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| 39 àíZ h¢ & 
 H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ Adí` 
{bI| & 
 Bg  àíZ-nÌ  15 {_ZQ >H$m g_` {X`m J`m h¡ &  àíZ-nÌ H$m 
10.15 ~Oo {H$`m OmEJm &  10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ 
Ho$db àíZ- -nwpñVH$m na H$moB© CÎma 
Zht {bI|Jo & 
 Please check that this question paper contains 27 printed pages. 
 Q.P. Code given on the right hand side of the question paper should be written 
on the title page of the answer-book by the candidate. 
 Please check that this question paper contains 39 questions. 
 Please write down the serial number of the question in the answer-book before 
attempting it. 
 15 minute time has been allotted to read this question paper. The question 
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the 
students will read the question paper only and will not write any answer on the 
answer-book during this period. 
{dkmZ  
SCIENCE 
{ZYm©[aV g_` : 3 KÊQ>o A{YH$V_ A§H$ : 80 
Time allowed : 3 hours Maximum Marks : 80 
31/C/2
 
* 
^ 
 
31/C/2 H 2 H 
: 
: 
(i) 39 
(ii)  
(iii) 1 20 1 
(iv) 21 26 2 
30 50 
(v) 27 33 3 
50 80 
(vi) 34 36 5 
80 120 
(vii) 37 39 3 
(viii) 
IÊS> H$ 
20 1 20 20 1=20 
1. 2 g nrbo gë\$a nmCS>a H$mo {H$gr Mm`Zm {S>e _| Obm`m J`m Am¡a {ZH$bo YwE± H$mo EH$ 
naIZbr _| EH$Ì {H$`m J`m & Bg naIZbr _| Ob S>mbm J`m Am¡a Bg àH$ma ~Zo {db`Z 
H$m narjU n¥WH$-n¥WH$ ê$n go Zrbo Am¡a bmb {bQ>_g nÌm| Ho$ gmW {H$`m J`m & ghr 
{dH$ën Mw{ZE : 
(a) Zrbm {bQ>_g Zrbm ahVm h¡ Am¡a bmb {bQ>_g Zrbm hmo OmVm h¡ & 
(b) Zrbm {bQ>_g bmb hmo OmVm h¡ Am¡a bmb {bQ>_g bmb hr ahVm h¡ & 
(c) Zrbm {bQ>_g bmb hmo OmVm h¡ Am¡a bmb {bQ>_g Zrbm hmo OmVm h¡ & 
(d) Zrbm {bQ>_g Zrbm hr ahVm h¡ Am¡a bmb {bQ>_g bmb hr ahVm h¡ & 
 
31/C/2 H 3 H P.T.O. 
General Instructions : 
Read the following instructions very carefully and strictly follow them : 
(i) This question paper comprises 39 questions. All questions are compulsory. 
(ii) This question paper is divided into five sections  A, B, C, D and E. 
(iii) Section A  Questions No. 1 to 20 are multiple choice questions. Each question 
carries 1 mark.  
(iv) Section B  Questions No. 21 to 26 are very short answer type questions. Each 
question carries 2 marks. Answer to these questions should be in the range of 
30 to 50 words.  
(v) Section C  Questions No. 27 to 33 are short answer type questions. Each 
question carries 3 marks. Answer to these questions should in the range of  
50 to 80 words.  
(vi) Section D  Questions No. 34 to 36 are long answer type questions. Each 
question carries 5 marks. Answer to these questions should be in the range of 
80 to 120 words.  
(vii) Section E  Questions No. 37 to 39 are of 3 source-based/case-based units of 
assessment carrying 4 marks each with sub-parts. 
(viii) There is no overall choice. However, an internal choice has been provided in  
some sections. Only one of the alternatives has to be attempted in such 
questions. 
SECTION A 
This section has 20 multiple choice questions (Q.No. 1  20). All questions are 
compulsory.  20 1=20 
1. 2 g of yellow sulphur powder is burnt in a china dish and the fumes are 
collected in a test tube. Water is added in the test tube and the solution is 
tested separately with blue and red litmus paper. The correct option is : 
(a) Blue litmus remains blue and red litmus turns blue. 
(b) Blue litmus turns red and red litmus remains red. 
(c) Blue litmus turns red and red litmus turns blue. 
(d) Blue litmus remains blue and red litmus remains red. 
 
31/C/2 H 4 H 
2. Amn Ob H$s H$R>moaVm H$m narjU H$aZm MmhVo h¢, naÝVw AmnH$s à`moJembm _| H$R>moa Ob 
CnbãY Zht h¡ & {ZåZ{b{IV _| go {H$Z `m¡{JH$m| H$mo ewÕ Ob _| KmobH$a Ob H$mo H$R>moa 
~Zm`m Om gH$Vm h¡ ?   
(i) gmo{S>`_ H$m hmBS´>moOZ H$m~m©oZoQ> 
(ii) _¡½Zr{e`_ H$m gë\oo$Q> 
(iii)  
(iv) gmo{S>`_ H$m H$m~m©oZoQ> 
(a) (i) Am¡a (ii)  
(b) (ii) Am¡a (iii) 
(c) (iii) Am¡a (iv) 
(d) (i) Am¡a (iv) 
3. Ob Ho$ {dÚwV-AnKQ>Z _| `{X EZmoS> na EH${ÌV J¡g H$m Ðì`_mZ m
a
 Am¡a H¡$WmoS> na 
EH${ÌV J¡g H$m Ðì`_mZ m
c
 h¡, Vmo (m
c
/m
a
) H$m _mZ hmoJm :
(a) 8 (b) 16 
(c) 
16
1
 (d) 
8
1
 
4. ZrMo {XE JE nXmWmªo na {dMma H$s{OE : 
(i) AåbrH¥$V K
2
Cr
2
O
7
 
(ii) jmar` KMnO
4
 
(iii)  
(iv) hmBS´>moOZ 
BZ_| go gm_mÝ`V:  (CnMm`r EOoÝQ>) h¢ : 
(a) Ho$db (i) Am¡a (ii) 
(b) Ho$db (ii) Am¡a (iii) 
(c) (i), (ii) Am¡a (iii) 
(d) (i), (ii) Am¡a (iv) 
 
31/C/2 H 5 H P.T.O. 
2. You want to test for hardness of water but hard water is not available in 
the laboratory. Which of the following compounds may be dissolved in 
pure water to make it hard ? 
(i) Hydrogen Carbonate of Sodium 
(ii) Sulphate of Magnesium 
(iii) Chloride of Calcium 
(iv) Carbonate of Sodium 
(a) (i) and (ii)  
(b) (ii) and (iii) 
(c) (iii) and (iv) 
(d) (i) and (iv) 
3. In the electrolysis of water, if the mass of the gas collected at the anode is 
m
a 
and the mass of the gas collected at the cathode is m
c
,
 
the value of 
(m
c
/m
a
) is : 
(a) 8 (b) 16 
(c) 
16
1
 (d) 
8
1
 
4. Consider the following substances : 
(i) Acidified K
2
Cr
2
O
7
 
(ii) Alkaline KMnO
4
 
(iii) Oxygen 
(iv) Hydrogen 
Out of these, the commonly used oxidising agents are : 
(a) (i) and (ii) only  
(b) (ii) and (iii) only 
(c) (i), (ii) and (iii) 
(d) (i), (ii) and (iv)