PYQ Vault

Day 42: MH HSC Class 12 Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: Feb 2020 (same type asked 4 times)

    Q.2.iii
    Write the balanced chemical reaction for the preparation of acetic anhydride using acetic acid.

  2. Question 2

    Amines. Asked once: Mar 2017 (same type asked 4 times)

    Q.8.i
    Write the action of NaNO2\text{NaNO}_{2} and dil. HCl\text{HCl} on: a\text{a}. Ethylamine b\text{b}. Aniline c\text{c}. Diethylamine. How is nylon 6,6 prepared? What are 'antacids'? Write any 'two' side effects of tranquilizers.

  3. Question 3

    Chemical Thermodynamics. Asked once: Jul 2025 (same type asked 4 times)

    Q. 29(i)
    State whether the following reaction is spontaneous or non spontaneous if ΔH=50\Delta H = 50 kJ and ΔS=−130 JK−1\Delta S = -130\ \mathrm{JK^{-1}} at 250 K.

  4. Question 4

    Chemical Thermodynamics. Asked once: Jul 2024 (same type asked 4 times)

    Q. 28(i)
    Define : (a) Standard enthalpy of combustion. (b) Enthalpy of atomization.

  5. Question 5

    Green Chemistry and Nanochemistry. Asked once: Mar 2022 (same type asked 4 times)

    Q.17
    Write two disadvantages of nanotechnology.