Class 12 Chemistry: CBSE Sample Question Papers (2025-26)

 Page 1


*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
CHEMISTRY (CODE - 043) 
SAMPLE QUESTION PAPER* 
CLASS XII (2025-26) 
 
Time: 3 hours                                                                                    Max. Marks: 70
                                                                    
GENERAL INSTRUCTIONS: 
     Read the following instructions carefully. 
1. There are 33 questions in this question paper with internal choice. 
2. SECTION A consists of 16 multiple-choice questions carrying 1 mark each. 
3. SECTION B consists of 5 short answer questions carrying 2 marks each. 
4. SECTION C consists of 7 short answer questions carrying 3 marks each. 
5. SECTION D consists of 2 case-based questions carrying 4 marks each. 
6. SECTION E consists of 3 long answer questions carrying 5 marks each. 
7. All questions are compulsory. 
8. Use of log tables and calculators is not allowed. 
 
Section-A 
 
Question 1 to 16 are multiple choice questions. Only one of the choices is correct. 
Select and write the correct choice as well as the answer to these questions. 
 
1 Which of the following reaction will lead to formation of ethyl methyl 
ketone:  
A. heating CH3CH(CH3)CH2OH with acidified Na2Cr2O7 
B. passing CH3C(OH) CH3 over heated copper  
C. ozonolysis of CH3CH2C(CH3)=CHCH3 
D. acetylene on reaction with HgSO4/H2SO4  
1 
 
2 
      Consider the reaction and identify B and C 
CH3CH2CH2CH2Cl    
NaOH +Ethanol
.       A                          
  A                             B    and     A                               C 
A 
A. B=C= Butanol 
B. B= Butanol, C=Butene 
C. B= Butan-2-ol, C= Butanol  
D. B= Butene, C=Butan-2-ol 
 
 1 
 
3 The counter ion in the coordination compound [Co(NH3)5(NO2)] Cl2 is 
A. Ammine 
B. Cobalt 
1 
 
(i) B 2H 6. (ii)H 2O 2, OH 
 
H 2O, H
+
 
Page 2


*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
CHEMISTRY (CODE - 043) 
SAMPLE QUESTION PAPER* 
CLASS XII (2025-26) 
 
Time: 3 hours                                                                                    Max. Marks: 70
                                                                    
GENERAL INSTRUCTIONS: 
     Read the following instructions carefully. 
1. There are 33 questions in this question paper with internal choice. 
2. SECTION A consists of 16 multiple-choice questions carrying 1 mark each. 
3. SECTION B consists of 5 short answer questions carrying 2 marks each. 
4. SECTION C consists of 7 short answer questions carrying 3 marks each. 
5. SECTION D consists of 2 case-based questions carrying 4 marks each. 
6. SECTION E consists of 3 long answer questions carrying 5 marks each. 
7. All questions are compulsory. 
8. Use of log tables and calculators is not allowed. 
 
Section-A 
 
Question 1 to 16 are multiple choice questions. Only one of the choices is correct. 
Select and write the correct choice as well as the answer to these questions. 
 
1 Which of the following reaction will lead to formation of ethyl methyl 
ketone:  
A. heating CH3CH(CH3)CH2OH with acidified Na2Cr2O7 
B. passing CH3C(OH) CH3 over heated copper  
C. ozonolysis of CH3CH2C(CH3)=CHCH3 
D. acetylene on reaction with HgSO4/H2SO4  
1 
 
2 
      Consider the reaction and identify B and C 
CH3CH2CH2CH2Cl    
NaOH +Ethanol
.       A                          
  A                             B    and     A                               C 
A 
A. B=C= Butanol 
B. B= Butanol, C=Butene 
C. B= Butan-2-ol, C= Butanol  
D. B= Butene, C=Butan-2-ol 
 
 1 
 
3 The counter ion in the coordination compound [Co(NH3)5(NO2)] Cl2 is 
A. Ammine 
B. Cobalt 
1 
 
(i) B 2H 6. (ii)H 2O 2, OH 
 
H 2O, H
+
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
C. Chloride 
D. Nitro 
4 The organic compounds A, B and C are amines having equivalent 
molecular weight. A and B on reaction with benzene sulphonyl chloride 
give white precipitate, however white precipitate obtained from 
compound B remains insoluble in NaOH. 
The variation in the boiling point of A, B and C  can be seen as :  
A. A> B>C 
B. B>A>C 
C. A=B > C 
D. C>B>A  
1 
 
5       70 gm solute is dissolved in 700 gm solvent to prepare a solution 
having density 1.5 g/ml. The ratio of its molality and molarity will be: 
A. 0.77 
B. 1.4 
C. 0.73 
D. 1.3 
 
1 
 
6       Match the column I and column II:  
 
A. A-(i), B-(ii), C-(iii), D-(iv) 
B. A-(iv), B-(ii), C-(iii), D-(i) 
C. A-(i), B-(iii), C-(ii), D-(iv) 
D. A-(iv), B-(iii), C-(ii), D-(i) 
1 
 
Page 3


*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
CHEMISTRY (CODE - 043) 
SAMPLE QUESTION PAPER* 
CLASS XII (2025-26) 
 
Time: 3 hours                                                                                    Max. Marks: 70
                                                                    
GENERAL INSTRUCTIONS: 
     Read the following instructions carefully. 
1. There are 33 questions in this question paper with internal choice. 
2. SECTION A consists of 16 multiple-choice questions carrying 1 mark each. 
3. SECTION B consists of 5 short answer questions carrying 2 marks each. 
4. SECTION C consists of 7 short answer questions carrying 3 marks each. 
5. SECTION D consists of 2 case-based questions carrying 4 marks each. 
6. SECTION E consists of 3 long answer questions carrying 5 marks each. 
7. All questions are compulsory. 
8. Use of log tables and calculators is not allowed. 
 
Section-A 
 
Question 1 to 16 are multiple choice questions. Only one of the choices is correct. 
Select and write the correct choice as well as the answer to these questions. 
 
1 Which of the following reaction will lead to formation of ethyl methyl 
ketone:  
A. heating CH3CH(CH3)CH2OH with acidified Na2Cr2O7 
B. passing CH3C(OH) CH3 over heated copper  
C. ozonolysis of CH3CH2C(CH3)=CHCH3 
D. acetylene on reaction with HgSO4/H2SO4  
1 
 
2 
      Consider the reaction and identify B and C 
CH3CH2CH2CH2Cl    
NaOH +Ethanol
.       A                          
  A                             B    and     A                               C 
A 
A. B=C= Butanol 
B. B= Butanol, C=Butene 
C. B= Butan-2-ol, C= Butanol  
D. B= Butene, C=Butan-2-ol 
 
 1 
 
3 The counter ion in the coordination compound [Co(NH3)5(NO2)] Cl2 is 
A. Ammine 
B. Cobalt 
1 
 
(i) B 2H 6. (ii)H 2O 2, OH 
 
H 2O, H
+
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
C. Chloride 
D. Nitro 
4 The organic compounds A, B and C are amines having equivalent 
molecular weight. A and B on reaction with benzene sulphonyl chloride 
give white precipitate, however white precipitate obtained from 
compound B remains insoluble in NaOH. 
The variation in the boiling point of A, B and C  can be seen as :  
A. A> B>C 
B. B>A>C 
C. A=B > C 
D. C>B>A  
1 
 
5       70 gm solute is dissolved in 700 gm solvent to prepare a solution 
having density 1.5 g/ml. The ratio of its molality and molarity will be: 
A. 0.77 
B. 1.4 
C. 0.73 
D. 1.3 
 
1 
 
6       Match the column I and column II:  
 
A. A-(i), B-(ii), C-(iii), D-(iv) 
B. A-(iv), B-(ii), C-(iii), D-(i) 
C. A-(i), B-(iii), C-(ii), D-(iv) 
D. A-(iv), B-(iii), C-(ii), D-(i) 
1 
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
7 In o-cresol, the –OH group is attached to the carbon that is: 
A. sp
3 
hybrid  
B. sp
2
 hybrid 
C. sp hybrid 
D. dsp
2
 hybrid 
1 
 
8 Which of the following is laevorotatory in nature : 
A. alpha D – glucose  
B. beta -D- glucose 
C. beta-D- fructose 
D. sucrose  
 
1 
 
9  The name inner transition metals is often used to refer to the  
A. lanthanoids  
B. actinoids 
C. both lanthanoids and actinoids 
D. d block elements 
1 
 
10  ?
?? ?? CH3COOH can be calculated if the values of the following are 
given: 
1.  ?
?? ?? HCl,  ?
?? ?? KCl and  ?
?? ?? CH3COOK 
2.  ?
?? ?? NaCl,  ?
?? ?? KCl and  ?
?? ?? CH3COONa 
3.  ?
?? ?? H2SO4,  ?
?? ?? Na2SO4 and  ?
?? ?? CH3COONa 
 
A. Only 1 
B. Either 1 or 2 
C. Either 1 or 3 
D. Either 2 or 3 
1 
 
11 
 
Which of the following will give a yellow or orange ppt. with 2,4 
DNP? 
 
(i) Porpanal (ii) Propanone (iii) Propanoic acid 
A. (i) and (ii) 
B. (ii) and (iii) 
C. (i) and (iii) 
D. (i), (ii) and (iii) 
1 
 
Page 4


*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
CHEMISTRY (CODE - 043) 
SAMPLE QUESTION PAPER* 
CLASS XII (2025-26) 
 
Time: 3 hours                                                                                    Max. Marks: 70
                                                                    
GENERAL INSTRUCTIONS: 
     Read the following instructions carefully. 
1. There are 33 questions in this question paper with internal choice. 
2. SECTION A consists of 16 multiple-choice questions carrying 1 mark each. 
3. SECTION B consists of 5 short answer questions carrying 2 marks each. 
4. SECTION C consists of 7 short answer questions carrying 3 marks each. 
5. SECTION D consists of 2 case-based questions carrying 4 marks each. 
6. SECTION E consists of 3 long answer questions carrying 5 marks each. 
7. All questions are compulsory. 
8. Use of log tables and calculators is not allowed. 
 
Section-A 
 
Question 1 to 16 are multiple choice questions. Only one of the choices is correct. 
Select and write the correct choice as well as the answer to these questions. 
 
1 Which of the following reaction will lead to formation of ethyl methyl 
ketone:  
A. heating CH3CH(CH3)CH2OH with acidified Na2Cr2O7 
B. passing CH3C(OH) CH3 over heated copper  
C. ozonolysis of CH3CH2C(CH3)=CHCH3 
D. acetylene on reaction with HgSO4/H2SO4  
1 
 
2 
      Consider the reaction and identify B and C 
CH3CH2CH2CH2Cl    
NaOH +Ethanol
.       A                          
  A                             B    and     A                               C 
A 
A. B=C= Butanol 
B. B= Butanol, C=Butene 
C. B= Butan-2-ol, C= Butanol  
D. B= Butene, C=Butan-2-ol 
 
 1 
 
3 The counter ion in the coordination compound [Co(NH3)5(NO2)] Cl2 is 
A. Ammine 
B. Cobalt 
1 
 
(i) B 2H 6. (ii)H 2O 2, OH 
 
H 2O, H
+
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
C. Chloride 
D. Nitro 
4 The organic compounds A, B and C are amines having equivalent 
molecular weight. A and B on reaction with benzene sulphonyl chloride 
give white precipitate, however white precipitate obtained from 
compound B remains insoluble in NaOH. 
The variation in the boiling point of A, B and C  can be seen as :  
A. A> B>C 
B. B>A>C 
C. A=B > C 
D. C>B>A  
1 
 
5       70 gm solute is dissolved in 700 gm solvent to prepare a solution 
having density 1.5 g/ml. The ratio of its molality and molarity will be: 
A. 0.77 
B. 1.4 
C. 0.73 
D. 1.3 
 
1 
 
6       Match the column I and column II:  
 
A. A-(i), B-(ii), C-(iii), D-(iv) 
B. A-(iv), B-(ii), C-(iii), D-(i) 
C. A-(i), B-(iii), C-(ii), D-(iv) 
D. A-(iv), B-(iii), C-(ii), D-(i) 
1 
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
7 In o-cresol, the –OH group is attached to the carbon that is: 
A. sp
3 
hybrid  
B. sp
2
 hybrid 
C. sp hybrid 
D. dsp
2
 hybrid 
1 
 
8 Which of the following is laevorotatory in nature : 
A. alpha D – glucose  
B. beta -D- glucose 
C. beta-D- fructose 
D. sucrose  
 
1 
 
9  The name inner transition metals is often used to refer to the  
A. lanthanoids  
B. actinoids 
C. both lanthanoids and actinoids 
D. d block elements 
1 
 
10  ?
?? ?? CH3COOH can be calculated if the values of the following are 
given: 
1.  ?
?? ?? HCl,  ?
?? ?? KCl and  ?
?? ?? CH3COOK 
2.  ?
?? ?? NaCl,  ?
?? ?? KCl and  ?
?? ?? CH3COONa 
3.  ?
?? ?? H2SO4,  ?
?? ?? Na2SO4 and  ?
?? ?? CH3COONa 
 
A. Only 1 
B. Either 1 or 2 
C. Either 1 or 3 
D. Either 2 or 3 
1 
 
11 
 
Which of the following will give a yellow or orange ppt. with 2,4 
DNP? 
 
(i) Porpanal (ii) Propanone (iii) Propanoic acid 
A. (i) and (ii) 
B. (ii) and (iii) 
C. (i) and (iii) 
D. (i), (ii) and (iii) 
1 
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
12 Identify the secondary benzylic halide and primary alkyl halide from 
the following: 
    
A. (i) and (iii) 
B. (iv) and (ii) 
C. (iii) and (iv) 
D.  (i) and (ii) 
 
1 
 
13 Assertion (A): Secondary aliphatic amines react with nitrous acid to 
form aliphatic diazonium salts which being unstable, liberate nitrogen 
gas quantitatively.  
Reason: Nitrogen gas evolved on reaction with nitrous acid can be 
used for the estimation of proteins and amino acids. 
 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, and R is not the correct explanation of A.  
C. A is true but R is false.  
D. A is false but R is true 
 
1 
 
14 Assertion (A): Care should always be taken to ensure that solutions 
that flow in the blood stream are of the same osmotic pressure as that 
of the blood. 
Reason(R): Sodium ion and potassium ions are responsible for 
maintaining proper osmotic pressure balance inside and outside of 
the cells of organism. 
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, and R is not the correct explanation of A.  
C. A is true but R is false.  
D. A is false but R is true 
 
 
1 
Page 5


*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
CHEMISTRY (CODE - 043) 
SAMPLE QUESTION PAPER* 
CLASS XII (2025-26) 
 
Time: 3 hours                                                                                    Max. Marks: 70
                                                                    
GENERAL INSTRUCTIONS: 
     Read the following instructions carefully. 
1. There are 33 questions in this question paper with internal choice. 
2. SECTION A consists of 16 multiple-choice questions carrying 1 mark each. 
3. SECTION B consists of 5 short answer questions carrying 2 marks each. 
4. SECTION C consists of 7 short answer questions carrying 3 marks each. 
5. SECTION D consists of 2 case-based questions carrying 4 marks each. 
6. SECTION E consists of 3 long answer questions carrying 5 marks each. 
7. All questions are compulsory. 
8. Use of log tables and calculators is not allowed. 
 
Section-A 
 
Question 1 to 16 are multiple choice questions. Only one of the choices is correct. 
Select and write the correct choice as well as the answer to these questions. 
 
1 Which of the following reaction will lead to formation of ethyl methyl 
ketone:  
A. heating CH3CH(CH3)CH2OH with acidified Na2Cr2O7 
B. passing CH3C(OH) CH3 over heated copper  
C. ozonolysis of CH3CH2C(CH3)=CHCH3 
D. acetylene on reaction with HgSO4/H2SO4  
1 
 
2 
      Consider the reaction and identify B and C 
CH3CH2CH2CH2Cl    
NaOH +Ethanol
.       A                          
  A                             B    and     A                               C 
A 
A. B=C= Butanol 
B. B= Butanol, C=Butene 
C. B= Butan-2-ol, C= Butanol  
D. B= Butene, C=Butan-2-ol 
 
 1 
 
3 The counter ion in the coordination compound [Co(NH3)5(NO2)] Cl2 is 
A. Ammine 
B. Cobalt 
1 
 
(i) B 2H 6. (ii)H 2O 2, OH 
 
H 2O, H
+
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
C. Chloride 
D. Nitro 
4 The organic compounds A, B and C are amines having equivalent 
molecular weight. A and B on reaction with benzene sulphonyl chloride 
give white precipitate, however white precipitate obtained from 
compound B remains insoluble in NaOH. 
The variation in the boiling point of A, B and C  can be seen as :  
A. A> B>C 
B. B>A>C 
C. A=B > C 
D. C>B>A  
1 
 
5       70 gm solute is dissolved in 700 gm solvent to prepare a solution 
having density 1.5 g/ml. The ratio of its molality and molarity will be: 
A. 0.77 
B. 1.4 
C. 0.73 
D. 1.3 
 
1 
 
6       Match the column I and column II:  
 
A. A-(i), B-(ii), C-(iii), D-(iv) 
B. A-(iv), B-(ii), C-(iii), D-(i) 
C. A-(i), B-(iii), C-(ii), D-(iv) 
D. A-(iv), B-(iii), C-(ii), D-(i) 
1 
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
7 In o-cresol, the –OH group is attached to the carbon that is: 
A. sp
3 
hybrid  
B. sp
2
 hybrid 
C. sp hybrid 
D. dsp
2
 hybrid 
1 
 
8 Which of the following is laevorotatory in nature : 
A. alpha D – glucose  
B. beta -D- glucose 
C. beta-D- fructose 
D. sucrose  
 
1 
 
9  The name inner transition metals is often used to refer to the  
A. lanthanoids  
B. actinoids 
C. both lanthanoids and actinoids 
D. d block elements 
1 
 
10  ?
?? ?? CH3COOH can be calculated if the values of the following are 
given: 
1.  ?
?? ?? HCl,  ?
?? ?? KCl and  ?
?? ?? CH3COOK 
2.  ?
?? ?? NaCl,  ?
?? ?? KCl and  ?
?? ?? CH3COONa 
3.  ?
?? ?? H2SO4,  ?
?? ?? Na2SO4 and  ?
?? ?? CH3COONa 
 
A. Only 1 
B. Either 1 or 2 
C. Either 1 or 3 
D. Either 2 or 3 
1 
 
11 
 
Which of the following will give a yellow or orange ppt. with 2,4 
DNP? 
 
(i) Porpanal (ii) Propanone (iii) Propanoic acid 
A. (i) and (ii) 
B. (ii) and (iii) 
C. (i) and (iii) 
D. (i), (ii) and (iii) 
1 
 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
12 Identify the secondary benzylic halide and primary alkyl halide from 
the following: 
    
A. (i) and (iii) 
B. (iv) and (ii) 
C. (iii) and (iv) 
D.  (i) and (ii) 
 
1 
 
13 Assertion (A): Secondary aliphatic amines react with nitrous acid to 
form aliphatic diazonium salts which being unstable, liberate nitrogen 
gas quantitatively.  
Reason: Nitrogen gas evolved on reaction with nitrous acid can be 
used for the estimation of proteins and amino acids. 
 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, and R is not the correct explanation of A.  
C. A is true but R is false.  
D. A is false but R is true 
 
1 
 
14 Assertion (A): Care should always be taken to ensure that solutions 
that flow in the blood stream are of the same osmotic pressure as that 
of the blood. 
Reason(R): Sodium ion and potassium ions are responsible for 
maintaining proper osmotic pressure balance inside and outside of 
the cells of organism. 
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, and R is not the correct explanation of A.  
C. A is true but R is false.  
D. A is false but R is true 
 
 
1 
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current 
session i.e. 2025-26. 
15 Assertion (A): Starch forms colloidal solution with water. 
Reason (R):  Starch contains 80-85% of amylopectin which is 
insoluble in water. 
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, and R is not the correct explanation of A.  
C. A is true but R is false.  
D. A is false but R is true 
 
1 
 
16 Assertion (A): Secondary cells are used in invertors. 
Reason (R): A primary cell can be recharged by passing current 
through it in the opposite direction after it has been used. 
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, and R is not the correct explanation of A.  
C. A is true but R is false.  
D. A is false but R is true 
 
1 
 
Section-B 
Question No. 17 to 21 are very short answer questions carrying 2 marks each. 
17 Attempt either option A or B 
A. Answer the following: 
 
I. When 50 mL of phenol and 50 mL of aniline are mixed, 
predict whether the volume of the solution is equal to, 
greater than or less than 100 mL. Give reason to support 
your answer.  
II. Ritesh suggested adding salt to the box containing ice. He 
said this would keep the cold drink bottles cold for a longer 
time. How will Ritesh justify his suggestion?  
OR 
B. Answer the following: 
I. BaCl2 on reaction with Na2SO4 in aqueous solution gives 
white precipitate. If the two solutions are separated by a 
semi-permeable membrane, will there be appearance of a 
white precipitate due to osmosis?  
II. Why does water stops boiling when sugar is added to boiling 
water.   
 
 
2x1 
 
 
 
 
 
2x1