Class 12 Chemistry: CBSE Sample Question Paper (2022-23) - 6 | Sample Papers for Class 12 Medical and Non-Medical PDF Download

 Page 1


1 
 
SAMPLE PAPER (2022-23)  
CHEMISTRY THEORY  
(043) 
MM:70                                                                                  Time: 3 hours  
General Instructions:  
Read the following instructions carefully. 
a) There are 35 questions in this question paper with internal choice. 
b) SECTION A consists of 18 multiple-choice questions carrying 1 mark each. 
c) SECTION B consists of 7 very short answer questions carrying 2 marks each. 
d) SECTION C consists of 5 short answer questions carrying 3 marks each. 
e) SECTION D consists of 2 case- based questions carrying 4 marks each. 
f) SECTION E consists of 3 long answer questions carrying 5 marks each. 
g) All questions are compulsory.  
h) Use of log tables and calculators is not allowed 
SECTION A  
The following questions are multiple-choice questions with one correct answer. Each 
question carries 1 mark. There is no internal choice in this section.  
1. The major product of acid catalysed dehydration of 1-methylcyclohexanol is: 
a. 1-methylcyclohexane 
b.  1-methylcyclohexene 
c. 1-cyclohexylmethanol 
d. 1-methylenecyclohexane   
2. Which one of the following compounds is more reactive towards SN1 reaction? 
a. CH2=CHCH2Br    
b. C6H5CH2Br   
c. C6H5CH (C6H5)Br  
d.  C6H5CH(CH3) Br 
3. KMnO4 is coloured due to: 
a. d-d transitions 
b. charge transfer from ligand to metal 
c. unpaired electrons in d orbital of Mn 
d. charge transfer from metal to ligand 
Page 2


1 
 
SAMPLE PAPER (2022-23)  
CHEMISTRY THEORY  
(043) 
MM:70                                                                                  Time: 3 hours  
General Instructions:  
Read the following instructions carefully. 
a) There are 35 questions in this question paper with internal choice. 
b) SECTION A consists of 18 multiple-choice questions carrying 1 mark each. 
c) SECTION B consists of 7 very short answer questions carrying 2 marks each. 
d) SECTION C consists of 5 short answer questions carrying 3 marks each. 
e) SECTION D consists of 2 case- based questions carrying 4 marks each. 
f) SECTION E consists of 3 long answer questions carrying 5 marks each. 
g) All questions are compulsory.  
h) Use of log tables and calculators is not allowed 
SECTION A  
The following questions are multiple-choice questions with one correct answer. Each 
question carries 1 mark. There is no internal choice in this section.  
1. The major product of acid catalysed dehydration of 1-methylcyclohexanol is: 
a. 1-methylcyclohexane 
b.  1-methylcyclohexene 
c. 1-cyclohexylmethanol 
d. 1-methylenecyclohexane   
2. Which one of the following compounds is more reactive towards SN1 reaction? 
a. CH2=CHCH2Br    
b. C6H5CH2Br   
c. C6H5CH (C6H5)Br  
d.  C6H5CH(CH3) Br 
3. KMnO4 is coloured due to: 
a. d-d transitions 
b. charge transfer from ligand to metal 
c. unpaired electrons in d orbital of Mn 
d. charge transfer from metal to ligand 
2 
 
4. Which radioactive isotope would have the longer half- life 
15
O or 
19
O? (Given rate 
constants for 
15
O and   
19
O  are 5.63x 10
-3
 s
-1
 and k = 2.38 x 10
-2
s
-1
 respectively.) 
a. 
15
O    
b. 
19
O   
c. Both will have the same half-life  
d. None of the above, information given is insufficient  
5. The molar conductivity of CH3COOH at infinite dilution is 390 Scm
2
/mol. Using the 
graph and given information, the molar conductivity of CH3COOK will be: 
 
 
a.  100 Scm
2
/mol 
b. 115 Scm
2
/mol 
c.  150 Scm
2
/mol 
d. 125 Scm
2
/mol 
 
*FOR VISUALLY CHALLENGED LEARNERS 
 
*5.  What is the molar conductance at infinite dilution for sodium chloride if the molar 
conductance at infinite dilution of Na
+
 and Cl
-
 ions are 51.12 × 10
-4 
Scm
2
/mol and 
73.54× 10
-4 
Scm
2
/mol respectively? 
 
a.  124.66 Scm
2
/mol 
b. 22.42 Scm
2
/mol 
c.  198.20Scm
2
/mol 
d. 175.78 Scm
2
/mol 
 
 
 
 
 
Page 3


1 
 
SAMPLE PAPER (2022-23)  
CHEMISTRY THEORY  
(043) 
MM:70                                                                                  Time: 3 hours  
General Instructions:  
Read the following instructions carefully. 
a) There are 35 questions in this question paper with internal choice. 
b) SECTION A consists of 18 multiple-choice questions carrying 1 mark each. 
c) SECTION B consists of 7 very short answer questions carrying 2 marks each. 
d) SECTION C consists of 5 short answer questions carrying 3 marks each. 
e) SECTION D consists of 2 case- based questions carrying 4 marks each. 
f) SECTION E consists of 3 long answer questions carrying 5 marks each. 
g) All questions are compulsory.  
h) Use of log tables and calculators is not allowed 
SECTION A  
The following questions are multiple-choice questions with one correct answer. Each 
question carries 1 mark. There is no internal choice in this section.  
1. The major product of acid catalysed dehydration of 1-methylcyclohexanol is: 
a. 1-methylcyclohexane 
b.  1-methylcyclohexene 
c. 1-cyclohexylmethanol 
d. 1-methylenecyclohexane   
2. Which one of the following compounds is more reactive towards SN1 reaction? 
a. CH2=CHCH2Br    
b. C6H5CH2Br   
c. C6H5CH (C6H5)Br  
d.  C6H5CH(CH3) Br 
3. KMnO4 is coloured due to: 
a. d-d transitions 
b. charge transfer from ligand to metal 
c. unpaired electrons in d orbital of Mn 
d. charge transfer from metal to ligand 
2 
 
4. Which radioactive isotope would have the longer half- life 
15
O or 
19
O? (Given rate 
constants for 
15
O and   
19
O  are 5.63x 10
-3
 s
-1
 and k = 2.38 x 10
-2
s
-1
 respectively.) 
a. 
15
O    
b. 
19
O   
c. Both will have the same half-life  
d. None of the above, information given is insufficient  
5. The molar conductivity of CH3COOH at infinite dilution is 390 Scm
2
/mol. Using the 
graph and given information, the molar conductivity of CH3COOK will be: 
 
 
a.  100 Scm
2
/mol 
b. 115 Scm
2
/mol 
c.  150 Scm
2
/mol 
d. 125 Scm
2
/mol 
 
*FOR VISUALLY CHALLENGED LEARNERS 
 
*5.  What is the molar conductance at infinite dilution for sodium chloride if the molar 
conductance at infinite dilution of Na
+
 and Cl
-
 ions are 51.12 × 10
-4 
Scm
2
/mol and 
73.54× 10
-4 
Scm
2
/mol respectively? 
 
a.  124.66 Scm
2
/mol 
b. 22.42 Scm
2
/mol 
c.  198.20Scm
2
/mol 
d. 175.78 Scm
2
/mol 
 
 
 
 
 
3 
 
6. For the reaction, A +2B ? AB2,  the order w.r.t. reactant A is 2 and w.r.t. reactant B. 
What will be change in rate of reaction if the concentration of A is doubled and B is 
halved? 
a.  increases four times 
b.  decreases four times 
c.  increases two times 
d. no change 
 
7. Arrange the following in the increasing order of their boiling points: 
      A : Butanamine, B: N,N-Dimethylethanamine, C: N- Etthylethanaminamine  
a. C<B<A  
b.  A<B<C   
c.  A<C<B    
d.  B<C<A 
8. The CFSE of [CoCl6]
3-
 is 18000 cm
-1
 the CFSE for [CoCl4]
- 
will be:   
a. 18000 cm
-1
 
b. 8000cm
-1
 
c. 2000 cm
-1
 
d. 16000 cm
-1
 
9. What would be the major product of the following reaction? 
         C6H5 -CH2-OC6H5 + HBr ? A + B  
a. A= C6H5CH2OH , B= C6H6  
b. A=C6H5CH2OH ,B= C6H5Br  
c. A=C6H5CH3  ,B= C6H5Br  
d. A=C6H5CH2Br , B= C6H5OH 
10. Which of the following statements is not correct for amines? 
a. Most alkyl amines are more basic than ammonia solution.  
b. pKb value of ethylamine is lower than benzylamine. 
c. CH3NH2 on reaction with nitrous acid releases NO2 gas.  
d. Hinsberg’s reagent reacts with secondary amines to form sulphonamides.  
11. Which of the following tests/ reactions is given by aldehydes as well as ketones? 
a. Fehling’s test 
b. Tollen’s test 
c. 2,4 DNP test 
d. Cannizzaro reaction 
Page 4


1 
 
SAMPLE PAPER (2022-23)  
CHEMISTRY THEORY  
(043) 
MM:70                                                                                  Time: 3 hours  
General Instructions:  
Read the following instructions carefully. 
a) There are 35 questions in this question paper with internal choice. 
b) SECTION A consists of 18 multiple-choice questions carrying 1 mark each. 
c) SECTION B consists of 7 very short answer questions carrying 2 marks each. 
d) SECTION C consists of 5 short answer questions carrying 3 marks each. 
e) SECTION D consists of 2 case- based questions carrying 4 marks each. 
f) SECTION E consists of 3 long answer questions carrying 5 marks each. 
g) All questions are compulsory.  
h) Use of log tables and calculators is not allowed 
SECTION A  
The following questions are multiple-choice questions with one correct answer. Each 
question carries 1 mark. There is no internal choice in this section.  
1. The major product of acid catalysed dehydration of 1-methylcyclohexanol is: 
a. 1-methylcyclohexane 
b.  1-methylcyclohexene 
c. 1-cyclohexylmethanol 
d. 1-methylenecyclohexane   
2. Which one of the following compounds is more reactive towards SN1 reaction? 
a. CH2=CHCH2Br    
b. C6H5CH2Br   
c. C6H5CH (C6H5)Br  
d.  C6H5CH(CH3) Br 
3. KMnO4 is coloured due to: 
a. d-d transitions 
b. charge transfer from ligand to metal 
c. unpaired electrons in d orbital of Mn 
d. charge transfer from metal to ligand 
2 
 
4. Which radioactive isotope would have the longer half- life 
15
O or 
19
O? (Given rate 
constants for 
15
O and   
19
O  are 5.63x 10
-3
 s
-1
 and k = 2.38 x 10
-2
s
-1
 respectively.) 
a. 
15
O    
b. 
19
O   
c. Both will have the same half-life  
d. None of the above, information given is insufficient  
5. The molar conductivity of CH3COOH at infinite dilution is 390 Scm
2
/mol. Using the 
graph and given information, the molar conductivity of CH3COOK will be: 
 
 
a.  100 Scm
2
/mol 
b. 115 Scm
2
/mol 
c.  150 Scm
2
/mol 
d. 125 Scm
2
/mol 
 
*FOR VISUALLY CHALLENGED LEARNERS 
 
*5.  What is the molar conductance at infinite dilution for sodium chloride if the molar 
conductance at infinite dilution of Na
+
 and Cl
-
 ions are 51.12 × 10
-4 
Scm
2
/mol and 
73.54× 10
-4 
Scm
2
/mol respectively? 
 
a.  124.66 Scm
2
/mol 
b. 22.42 Scm
2
/mol 
c.  198.20Scm
2
/mol 
d. 175.78 Scm
2
/mol 
 
 
 
 
 
3 
 
6. For the reaction, A +2B ? AB2,  the order w.r.t. reactant A is 2 and w.r.t. reactant B. 
What will be change in rate of reaction if the concentration of A is doubled and B is 
halved? 
a.  increases four times 
b.  decreases four times 
c.  increases two times 
d. no change 
 
7. Arrange the following in the increasing order of their boiling points: 
      A : Butanamine, B: N,N-Dimethylethanamine, C: N- Etthylethanaminamine  
a. C<B<A  
b.  A<B<C   
c.  A<C<B    
d.  B<C<A 
8. The CFSE of [CoCl6]
3-
 is 18000 cm
-1
 the CFSE for [CoCl4]
- 
will be:   
a. 18000 cm
-1
 
b. 8000cm
-1
 
c. 2000 cm
-1
 
d. 16000 cm
-1
 
9. What would be the major product of the following reaction? 
         C6H5 -CH2-OC6H5 + HBr ? A + B  
a. A= C6H5CH2OH , B= C6H6  
b. A=C6H5CH2OH ,B= C6H5Br  
c. A=C6H5CH3  ,B= C6H5Br  
d. A=C6H5CH2Br , B= C6H5OH 
10. Which of the following statements is not correct for amines? 
a. Most alkyl amines are more basic than ammonia solution.  
b. pKb value of ethylamine is lower than benzylamine. 
c. CH3NH2 on reaction with nitrous acid releases NO2 gas.  
d. Hinsberg’s reagent reacts with secondary amines to form sulphonamides.  
11. Which of the following tests/ reactions is given by aldehydes as well as ketones? 
a. Fehling’s test 
b. Tollen’s test 
c. 2,4 DNP test 
d. Cannizzaro reaction 
4 
 
12. Arrhenius equation can be represented graphically as follows: 
 
 
 
 
 
 
 
        The (i) intercept and (ii) slope of the graph are: 
a. (i) ln A (ii) Ea/R 
b. (i) A     (ii) Ea 
c. (i)ln A  (ii) - Ea/R 
d. (i) A     (ii)  -Ea              
 
 
*FOR VISUALLY CHALLENGED LEARNERS 
 
*12.       The unit of rate constant for the reaction 
             2A + 2B ? A2B2 
          which has rate = k [A]
2
[B] is: 
a.  mol L
-1
s
-1
 
b. s
-1
 
c. mol L
-1
    
d. mol
-2
 L
2 
s
-1
 
13. The number of ions formed on dissolving one molecule of FeSO4.(NH4)2SO4.6H2O 
in water is: 
a. 3 
b. 4 
c. 5 
d. 6 
14. The oxidation of toluene to benzaldehyde by chromyl chloride is called 
a. Etard reaction 
b. Riemer-Tiemann reaction 
c. Stephen’s reaction 
d. Cannizzaro’s reaction 
15. Given below are two statements labelled as Assertion (A) and Reason (R)  
 
Page 5


1 
 
SAMPLE PAPER (2022-23)  
CHEMISTRY THEORY  
(043) 
MM:70                                                                                  Time: 3 hours  
General Instructions:  
Read the following instructions carefully. 
a) There are 35 questions in this question paper with internal choice. 
b) SECTION A consists of 18 multiple-choice questions carrying 1 mark each. 
c) SECTION B consists of 7 very short answer questions carrying 2 marks each. 
d) SECTION C consists of 5 short answer questions carrying 3 marks each. 
e) SECTION D consists of 2 case- based questions carrying 4 marks each. 
f) SECTION E consists of 3 long answer questions carrying 5 marks each. 
g) All questions are compulsory.  
h) Use of log tables and calculators is not allowed 
SECTION A  
The following questions are multiple-choice questions with one correct answer. Each 
question carries 1 mark. There is no internal choice in this section.  
1. The major product of acid catalysed dehydration of 1-methylcyclohexanol is: 
a. 1-methylcyclohexane 
b.  1-methylcyclohexene 
c. 1-cyclohexylmethanol 
d. 1-methylenecyclohexane   
2. Which one of the following compounds is more reactive towards SN1 reaction? 
a. CH2=CHCH2Br    
b. C6H5CH2Br   
c. C6H5CH (C6H5)Br  
d.  C6H5CH(CH3) Br 
3. KMnO4 is coloured due to: 
a. d-d transitions 
b. charge transfer from ligand to metal 
c. unpaired electrons in d orbital of Mn 
d. charge transfer from metal to ligand 
2 
 
4. Which radioactive isotope would have the longer half- life 
15
O or 
19
O? (Given rate 
constants for 
15
O and   
19
O  are 5.63x 10
-3
 s
-1
 and k = 2.38 x 10
-2
s
-1
 respectively.) 
a. 
15
O    
b. 
19
O   
c. Both will have the same half-life  
d. None of the above, information given is insufficient  
5. The molar conductivity of CH3COOH at infinite dilution is 390 Scm
2
/mol. Using the 
graph and given information, the molar conductivity of CH3COOK will be: 
 
 
a.  100 Scm
2
/mol 
b. 115 Scm
2
/mol 
c.  150 Scm
2
/mol 
d. 125 Scm
2
/mol 
 
*FOR VISUALLY CHALLENGED LEARNERS 
 
*5.  What is the molar conductance at infinite dilution for sodium chloride if the molar 
conductance at infinite dilution of Na
+
 and Cl
-
 ions are 51.12 × 10
-4 
Scm
2
/mol and 
73.54× 10
-4 
Scm
2
/mol respectively? 
 
a.  124.66 Scm
2
/mol 
b. 22.42 Scm
2
/mol 
c.  198.20Scm
2
/mol 
d. 175.78 Scm
2
/mol 
 
 
 
 
 
3 
 
6. For the reaction, A +2B ? AB2,  the order w.r.t. reactant A is 2 and w.r.t. reactant B. 
What will be change in rate of reaction if the concentration of A is doubled and B is 
halved? 
a.  increases four times 
b.  decreases four times 
c.  increases two times 
d. no change 
 
7. Arrange the following in the increasing order of their boiling points: 
      A : Butanamine, B: N,N-Dimethylethanamine, C: N- Etthylethanaminamine  
a. C<B<A  
b.  A<B<C   
c.  A<C<B    
d.  B<C<A 
8. The CFSE of [CoCl6]
3-
 is 18000 cm
-1
 the CFSE for [CoCl4]
- 
will be:   
a. 18000 cm
-1
 
b. 8000cm
-1
 
c. 2000 cm
-1
 
d. 16000 cm
-1
 
9. What would be the major product of the following reaction? 
         C6H5 -CH2-OC6H5 + HBr ? A + B  
a. A= C6H5CH2OH , B= C6H6  
b. A=C6H5CH2OH ,B= C6H5Br  
c. A=C6H5CH3  ,B= C6H5Br  
d. A=C6H5CH2Br , B= C6H5OH 
10. Which of the following statements is not correct for amines? 
a. Most alkyl amines are more basic than ammonia solution.  
b. pKb value of ethylamine is lower than benzylamine. 
c. CH3NH2 on reaction with nitrous acid releases NO2 gas.  
d. Hinsberg’s reagent reacts with secondary amines to form sulphonamides.  
11. Which of the following tests/ reactions is given by aldehydes as well as ketones? 
a. Fehling’s test 
b. Tollen’s test 
c. 2,4 DNP test 
d. Cannizzaro reaction 
4 
 
12. Arrhenius equation can be represented graphically as follows: 
 
 
 
 
 
 
 
        The (i) intercept and (ii) slope of the graph are: 
a. (i) ln A (ii) Ea/R 
b. (i) A     (ii) Ea 
c. (i)ln A  (ii) - Ea/R 
d. (i) A     (ii)  -Ea              
 
 
*FOR VISUALLY CHALLENGED LEARNERS 
 
*12.       The unit of rate constant for the reaction 
             2A + 2B ? A2B2 
          which has rate = k [A]
2
[B] is: 
a.  mol L
-1
s
-1
 
b. s
-1
 
c. mol L
-1
    
d. mol
-2
 L
2 
s
-1
 
13. The number of ions formed on dissolving one molecule of FeSO4.(NH4)2SO4.6H2O 
in water is: 
a. 3 
b. 4 
c. 5 
d. 6 
14. The oxidation of toluene to benzaldehyde by chromyl chloride is called 
a. Etard reaction 
b. Riemer-Tiemann reaction 
c. Stephen’s reaction 
d. Cannizzaro’s reaction 
15. Given below are two statements labelled as Assertion (A) and Reason (R)  
 
5 
 
Assertion (A): An ether is more volatile than an alcohol of comparable molecular                 
mass. 
Reason (R): Ethers are polar in nature.        
    Select the most appropriate answer from the options given below:  
a. Both A and R are true and R is the correct explanation of A 
b. Both A and R are true but R is not the correct explanation of A.  
c. A is true but R is false.  
d. A is false but R is true. 
 
16. Given below are two statements labelled as Assertion (A) and Reason (R)  
 
Assertion (A): Proteins are found to have two different types of secondary     
structures viz alpha-helix and beta-pleated sheet structure.                                                        
Reason (R): The secondary structure of proteins is stabilized by hydrogen 
bonding.      
Select the most appropriate answer from the options given below:  
a. Both A and R are true and R is the correct explanation of A 
b. Both A and R are true but R is not the correct explanation of A.  
c. A is true but R is false.  
d. A is false but R is true. 
    
17. Given below are two statements labelled as Assertion (A) and Reason (R)  
 
Assertion : Magnetic moment values of actinides are lesser than the 
theoretically predicted values. 
Reason : Actinide elements are strongly paramagnetic.       
 Select the most appropriate answer from the options given below:  
a. Both A and R are true and R is the correct explanation of A 
b. Both A and R are true but R is not the correct explanation of A.  
c. A is true but R is false.  
d. A is false but R is true.  
 
18. Given below are two statements labelled as Assertion (A) and Reason (R)  
 
Assertion (A): Tertiary amines are more basic than corresponding secondary 
and primary amines in gaseous state. 
Reason (R): Tertiary amines have three alkyl groups which cause +I effect. 
 Select the most appropriate answer from the options given below:  
a. Both A and R are true and R is the correct explanation of A 
b. Both A and R are true but R is not the correct explanation of A.  
c. A is true but R is false.  
d. A is false but R is true. 
    
SECTION B