PYQ Vault

Day 23: MH HSC Class 12 Chemistry

5 questions. Try each one first, then open its answer.

  1. Question 1

    Halogen Derivatives. This type asked 4 times: Mar 2014, Jul 2024, Feb 2025, Feb 2026. This one: Feb 2026

    Q. 30(ii)
    Explain the mechanism of alkaline hydrolysis of bromomethane.

  2. Question 2

    Ionic Equilibria. This type asked 4 times: Mar 2022, Mar 2023, Feb 2025, Feb 2026. This one: Feb 2026

    Q. 31(i)
    Acetic acid is 5% ionised in its decimolar solution. Calculate the dissociation constant of acetic acid.

  3. Question 3

    Chemical Thermodynamics. This type asked 4 times: Mar 2014, Mar 2023, Feb 2025, Jul 2025. This one: Jul 2025

    Select and write the correct answer for the following multiple choice type of questions :
    Q.1.iv
    Ideal gas expands isothermally from 20 dm320\ \mathrm{dm^{3}} to 25 dm325\ \mathrm{dm^{3}} at constant pressure of 1.5 bar; then work done in dm3\mathrm{dm^{3}} bar will be _____.

    Tap an option to check your answer.

  4. Question 4

    Elements of Groups 16, 17 and 18. This type asked 4 times: Mar 2015, Mar 2023, Feb 2024, Feb 2025. This one: Feb 2025

    Q.15
    Draw the structures of sulphuric acid and thiosulphuric acid.

  5. Question 5

    Halogen Derivatives. This type asked 4 times: Mar 2015, Mar 2022, Mar 2023, Feb 2025. This one: Feb 2025

    Q.31.b
    What is the action of following reagents on bromomethane : (i) bromobenzene (ii) mercurous fluoride