AISSCE ( 2025-26) SAMPLE PAPER
CHEMISTRY THEORY( 043)
CLASS – XII
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. ( 16 ×1= 16)
Q1. Radioactive disintegration is an example of-
(a) first order reaction
(b) zero order reaction
(c) second order reaction
(d) third order reaction
Q2 IUPAC name of the following compound is-
(CH3)2CH – O – CH3
(a) 1-methoxy-1-methylethane
(b) 2-methoxypropane
(c) 2-methoxy-2-methylethane
(d) isopropylmethyl ether
Q3. Which of the following salt will have same value of Van’t Hoff’s factor as that of
K4[Fe (CN)6].
(a) KCl
(b) Mg(NO3)2
(c) Al2(SO4)3
(d) K2SO4
Q4. On increasing temperature-
(a) ionic conductance increases and electronic conductance decreases.
, (b) ionic conductance decreases and electronic conductance increases.
(c) both ionic and electronic conductance increase.
(d) both ionic and electronic conductance decrease.
Q5. Based on the position of –Br in the compound , CH3CH=CH–CH(Br)(CH3)2 can be classified
as
(a) 10Allyl halide
(b) Vinylic halide
(c) 20 Allylic halide
(d) 30 Allylic halide
Q6. What is the correct order of reactivity of the following towards nucleophilic
addition reaction?
(a) HCHO > CH3CHO > CH3COCH3
(b) CH3COCH3 > HCHO > CH3CHO
(c) CH3CHO ~ CH3CHO > HCHO
(d) CH3CHO > HCHO > CH3COCH3
Q7. When a non-volatile solid is added to pure water it will:
(a) freeze above 00C
(b) freeze below 00C
( c) boil below 1000C
(d) boil at 1000C
Q8. Which of the following statements is incorrect regarding a catalyst which is used in a
particular reaction.
(a) has no effect on ∆rG of reaction.
(b) lowers activation energy ( Ea)
(c) changes the magnitude of Kc ( equilibrium constant)
(d) catalyzes spontaneous reaction
Q9.In Clemmensen Reduction, carbonyl compound is treated with-
(a) Zincamalgam + HCl
(b) Sodium amalgam + HCl
(c) Zinc amalgam + HNO3
(d) Sodium amalgam + HNO3
Q10.In a reaction, the concentration of a reactant (R) changes from 0.50 mol L–1to 0.10 mol L–1in
180 seconds. The average rate of a reaction during this interval is-
(a) 0.0044 mol L-1 s-1
(b) 0.0011 mol L-1s-1
(c) 0.0022 mol L-1s-1
(d) 0.005 mol L-1s-1
CHEMISTRY THEORY( 043)
CLASS – XII
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. ( 16 ×1= 16)
Q1. Radioactive disintegration is an example of-
(a) first order reaction
(b) zero order reaction
(c) second order reaction
(d) third order reaction
Q2 IUPAC name of the following compound is-
(CH3)2CH – O – CH3
(a) 1-methoxy-1-methylethane
(b) 2-methoxypropane
(c) 2-methoxy-2-methylethane
(d) isopropylmethyl ether
Q3. Which of the following salt will have same value of Van’t Hoff’s factor as that of
K4[Fe (CN)6].
(a) KCl
(b) Mg(NO3)2
(c) Al2(SO4)3
(d) K2SO4
Q4. On increasing temperature-
(a) ionic conductance increases and electronic conductance decreases.
, (b) ionic conductance decreases and electronic conductance increases.
(c) both ionic and electronic conductance increase.
(d) both ionic and electronic conductance decrease.
Q5. Based on the position of –Br in the compound , CH3CH=CH–CH(Br)(CH3)2 can be classified
as
(a) 10Allyl halide
(b) Vinylic halide
(c) 20 Allylic halide
(d) 30 Allylic halide
Q6. What is the correct order of reactivity of the following towards nucleophilic
addition reaction?
(a) HCHO > CH3CHO > CH3COCH3
(b) CH3COCH3 > HCHO > CH3CHO
(c) CH3CHO ~ CH3CHO > HCHO
(d) CH3CHO > HCHO > CH3COCH3
Q7. When a non-volatile solid is added to pure water it will:
(a) freeze above 00C
(b) freeze below 00C
( c) boil below 1000C
(d) boil at 1000C
Q8. Which of the following statements is incorrect regarding a catalyst which is used in a
particular reaction.
(a) has no effect on ∆rG of reaction.
(b) lowers activation energy ( Ea)
(c) changes the magnitude of Kc ( equilibrium constant)
(d) catalyzes spontaneous reaction
Q9.In Clemmensen Reduction, carbonyl compound is treated with-
(a) Zincamalgam + HCl
(b) Sodium amalgam + HCl
(c) Zinc amalgam + HNO3
(d) Sodium amalgam + HNO3
Q10.In a reaction, the concentration of a reactant (R) changes from 0.50 mol L–1to 0.10 mol L–1in
180 seconds. The average rate of a reaction during this interval is-
(a) 0.0044 mol L-1 s-1
(b) 0.0011 mol L-1s-1
(c) 0.0022 mol L-1s-1
(d) 0.005 mol L-1s-1
