PYQ Vault

Day 1: MH HSC Class 12 Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked 4 times: Mar 2014, Mar 2023, Jul 2025, Jun 2026

    Q. 10
    Explain aldol condensation reaction with respect to ethanal.

  2. Question 2

    Elements of Groups 16, 17 and 18. Asked 4 times: Mar 2023, Jul 2024, Feb 2025, Jun 2026

    Q. 23
    (a) Explain anomalous behaviour of oxygen with respect to (i) Atomicity (ii) Magnetic property (iii) Oxidation state (iv) Nature of hydride (b) Write any two uses of helium.

  3. Question 3

    Chemical Thermodynamics. Asked 4 times: Mar 2014, Mar 2023, Jul 2025, Jun 2026

    Q. 28(i)
    Derive relationship between ΔH\Delta H and ΔU\Delta U for a gaseous chemical reaction.

  4. Question 4

    Aldehydes, Ketones and Carboxylic Acids. Asked 4 times: Mar 2014, Feb 2024, Feb 2025, Feb 2026

    Q. 12
    Explain Cannizzaro reaction with suitable example.

  5. Question 5

    Chemical Thermodynamics. Asked 4 times: Mar 2016, Mar 2022*, Jul 2024*, Feb 2026 (* = numbers or wording changed that year)

    Q. 9
    Write the mathematical equation of first law of thermodynamics for following processes : (a) Isochoric process (b) Adiabatic process