CBSE Class 12 Chemistry Answer Key 2024: CBSE Class 12 students appeared for their Chemistry exam on February 27, 2024. Most of the students seemed to be satisfied with the level of questions asked in the exam. We have provided here answers to all the questions of CBSE Class 12 Chemistry to help students know the correct answers and evaluate their performance in the exam. The CBSE Class 12 Chemistry Answer Key 2024 for Sets 1, 2, 3 and 4 is available here. You can also check the exam analysis and all sets of the question paper in PDF format. First of all, scroll down for the correct answers for CBSE Class 12 Chemistry question paper 2024.
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CBSE Class 12 Chemistry Answer Key 2024 (Set 1)
SECTION - A (MCQs)
1. Van't Hoff factor for K₂SO4 solution, assuming complete ionization is
(A) 1
(B) 3
(C) 13
(D) 2
Answer: (B) 3
2. Dilution affects both conductivity as well as molar conductivity. Effect of dilution on both is as follows:
(A) both increase with dilution.
(B) both decrease with dilution.
(C) conductivity increases whereas molar conductivity decreases on dilution.
(D) conductivity decreases whereas molar conductivity increases on dilution.
Answer:
3. Which of the following species can act as the strongest base?
(A) OH-
(B) C6H5O-
(C) RO-
(D)
Answer: (C) RO-
4. In which of the following molecules, C atom marked with asterisk is chiral?
(A) I, II, III
(C) II, III, IV
(B) I, II, III, IV
(D) I, III, IV
Answer: (A) I, II, III
5. The rate of a reaction increases sixteen times when the concentration of the reactant increases four times. The order of the reaction is
(A) 2.5
(B) 2.0
(C) 1.5
(D) 0.5
Answer: (B) 2.0
6. Which of the following cell is used in hearing aids?
(A) Mercury cell
(B) H2-O2 fuel cell
(C) Dry cell
(D) Ni-Cd cell
Answer: (A) Mercury cell
7. Isotonic solutions have the same
(A) density
(C) osmotic pressure
(B) refractive index
(D) volume
Answer: (C) osmotic pressure
8. Transition metals are known to make interstitial compounds. Formation of interstitial compounds makes the transition metal
(A) more hard
(C) more ductile
(B) more soft
(D) more metallic
Answer: (A) more hard
9. Auto-oxidation of chloroform in air and light produces a poisonous gas known as
(A) Phosphine
(C) Phosgene
(B) Mustard gas
(D) Tear gas
Answer: (C) Phosgene
10. Out of the following alkenes, the one which will produce tertiary butyl alcohol on acid catalysed hydration is
(A) CH3CH3CH=CH2
(B) CH3CH=CH2
(C) CH3-CH=CH-CH3
(D) (CH3)2C = CH2
Answer: (D) (CH3)2C = CH2
11. The correct name of the given reaction is
(A) Sandmeyer's reaction
(B) Gabriel Phthalimide synthesis
(C) Carbyl amine reaction
(D) Hoffmann bromamide degradation reaction
Answer: (A) Sandmeyer's reaction
12. The specific sequence in which amino acids are arranged in a protein is called its
(A) Primary structure
(B) Secondary structure
(C) Tertiary structure
(D) Quaternary structure
Answer: (A) Primary structure
For questions number 13 to 16, two statements are given one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (A), (B), (C) and (D) as given below:
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
(C) Assertion (A) is true, but Reason (R) is false.
(D) Assertion (A) is false, but Reason (R) is true.
13. Assertion (A): Zr and Hf are of almost similar atomic radii.
Reason (R): This is due to Lanthanoid contraction.
Answer: (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
14. Assertion (A): The units of rate constant of a zero order reaction and rate of reaction are the same.
Reason (R): In zero order reaction, the rate of reaction is independent of the concentration of reactants.
Answer: (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
15. Assertion (A): Inversion of configuration is observed in SN2 reaction.
Reason (R): The reaction proceeds with the formation of carbocation.
Answer: (B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
16. Assertion (A): p-methoxyphenol is a stronger acid than p-nitrophenol.
Reason (R): Methoxy group shows +I effect whereas nitro group shows-I effect.
Answer: (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
CBSE Class 12 Chemistry Answer Key 2024 - Set 2 (56/5/2)
| Question No. | Answer | Question No. | Answer |
| 1 | C | 9 | B |
| 2 | C | 10 | C |
| 3 | C | 11 | - |
| 4 | A | 12 | C |
| 5 | A | 13 | A |
| 6 | D | 14 | B |
| 7 | C | 15 | A |
| 8 | B | 16 | A |
Answers to the remaining questions will be updated in a short while!
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