CBSE Class 12 Chemistry Exam 2026 Repeated Questions

CBSE Class 12 Chemistry Exam 2026 Repeated Questions are helpful during the preparation for the exams. You can learn about the repeated questions through the sample question papers and previous years' question papers. You can try to accelerate your preparations using the repeated questions and CBSE Class 12 Chemistry Important Questions 2026 . These questions will help you to understand the question paper pattern and also the commonly asked topics. Chemistry can be a difficult subject to manage, so make sure that you complete your CBSE Class 12 Chemistry Syllabus 2026 on time and revise through the model test papers available on the official website of CBSE Academics.

The duration for the Chemistry paper will be three hours, with 70 marks. It will be equipped with MCQs, very short answer type questions, short answer type questions, and long answer type questions. Internal choices will be included in every section. Below, we have accumulated some common CBSE Class 12 Chemistry Exam 2026 Repeated Questions for your help.

CBSE Class 12 Chemistry Exam 2026 Repeated Questions

The CBSE 12th Chemistry paper will be conducted for 70 marks, while the remaining marks are allotted for the practical session.

Question 1. (i) On mixing liquid X and liquid Y, the volume of the resulting solution decreases. What type of deviation from Raoult's law is shown by the resulting solution? What change in temperature would you observe after mixing liquids X and Y?

(ii) What happens when we place the blood cell in water (hypotonic solution)? Give a reason.

Question 2. Why on dilution the LMR of CH3COOH increase drastically, while that of CH3COONa increases gradually? How will you determine the LMR of a weak electrolyte?

Question 3. Calculate the time to deposit 1.5 g of silver at the cathode when a current of 1.5 A is passed through the solution of AgNO3.

Question 4. In a reaction, the initial concentration of the reactants increases 4-fold and the rate becomes 16 times its initial value. The order of the reaction is:

1. 2
2. 3
3. 1
4. 2

Question 5. Give reasons: (i) Transition metals and many of their compounds act as a good catalysts.

(ii) The copper atom has completely filled d orbitals (3d) in its ground state, yet is recorded as a Transition Element.

(iii)The metallic radii of the third (5d) series of transition metals are nearly the same as those of the corresponding members of the second series.

Also Read CBSE Class 12 Chemistry Previous Year Question Paper

Question 6. (i) What is the IUPAC name of the complex: [Ni(NH3)6]Cl2?

(ii) What is the IUPAC name of the complex: [COCl2(en)2]?

Question 7. What happens when:

(i) Methyl chloride is treated with alcoholic KCN.

(ii) Ethyl chloride is treated with alcoholic KOH.

(iii) Chloroform is heated with Ag powder.

Question 8. Give the structure of the major product expected from the following reactions:

(a) Reaction of Ethanal with methyl-magnesium bromide followed by hydrolysis.

(b) Hydration of But-1-ene in the presence of dilute sulphuric acid.

(c) Reaction of phenol with bromine water.

Question 9. Give a simple chemical test to distinguish between the following pairs of compounds.

i. Propanal and Propanone

ii. Acetophenone and Benzophenone

iii. Phenol and Benzoic acid

iv. Benzoic acid and Ethyl benzoate

v. Pentan-2-one and Pentan-3-one

vi. Benzaldehyde and Acetophenone

vii. Ethanal and Propanal

Question 10. Give the chemical tests to distinguish between the following pairs of compounds :

(i) Ethylamine and Aniline

(ii) Aniline and Benzylamine

Do not forget to analyse the CBSE Class 12 Chemistry Weightage 2026 before attempting these questions. If you have information about the question paper pattern, it will be easier for you to attempt it during the board exams. Ensure that you are also actively solving the CBSE Class 12 Chemistry Sample Papers 2025-26 for a more thorough revision.