PYQ Vault

Day 21: MH HSC Class 12 Chemistry

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

  1. Question 1

    Amines. This type asked 4 times: Mar 2017, Mar 2018, Mar 2023, Jun 2026. This one: Mar 2018

    Q.8.iv
    How are ethylamine and diethylamine distinguished by using nitrous acid?

  2. Question 2

    Chemical Thermodynamics. This type asked 4 times: Mar 2015, Feb 2020, Jul 2025, Jun 2026. This one: Jun 2026

    Answer the following questions :
    Q.2.vii
    Calculate change over temperature for a certain reaction, whose ΔH∘\Delta H^{\circ} is −60-60 kJ and ΔS∘\Delta S^{\circ} is −150 JK−1-150\ \mathrm{JK^{-1}}.

  3. Question 3

    Chemical Thermodynamics. This type asked 4 times: Mar 2015, Feb 2020, Jul 2024, Jun 2026. This one: Jun 2026

    Q. 6
    Define the following terms : (a) Intensive property (b) Standard enthalpy of combustion

  4. Question 4

    Green Chemistry and Nanochemistry. This type asked 4 times: Mar 2022, Mar 2023, Feb 2025, Jun 2026. This one: Feb 2025

    Q.17
    What is atom economy? Explain any two applications of nanomaterials.

  5. Question 5

    Halogen Derivatives. This type asked 4 times: Mar 2019, Mar 2023, Feb 2024, Jun 2026. This one: Jun 2026

    Q. 31
    (a) What is the action of following reagents on Bromoethane? (i) KNO2\mathrm{KNO_2} (ii) 'Mg' metal (iii) Silver acetate (b) Draw structure - DDT insecticide.