PYQ Vault

Day 36: MH HSC Class 12 Chemistry

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

  1. Question 1

    Elements of Groups 16, 17 and 18. This type asked 2 times: Mar 2014, Feb 2025. This one: Feb 2025

    Q.30.b
    Why does fluorine show anomalous behaviour in '17 group' elements?

  2. Question 2

    Transition and Inner Transition Elements. This type asked 2 times: Mar 2015, Feb 2025. This one: Feb 2025

    Q.22.a
    Write the reducing agents used to convert Fe2O3\mathrm{Fe_2O_3} to 'Fe' in the reduction zone of blast furnace.

  3. Question 3

    Chemical Thermodynamics. This type asked 2 times: Mar 2023, Jul 2024. This one: Jul 2024

    Answer the following questions :
    Q.2.vii
    Write the condition for spontaneity of reaction with respect to entropy.

  4. Question 4

    Elements of Groups 16, 17 and 18. This type asked 2 times: Feb 2020, Jul 2024. This one: Jul 2024

    Q. 27(i)
    How is dioxygen prepared in laboratory from KClO3\mathrm{KClO_3}?

  5. Question 5

    Solutions. This type asked 2 times: Mar 2017, Jul 2024. This one: Jul 2024

    Q. 3
    The normal boiling point of ethyl acetate is 77.06 °C. A solution of 50 g of non-volatile solute in 150 g ethyl acetate boils at 82.60 °C. Calculate molar mass of solute. [Kb=2.77 ∘C kg mol−1][K_b = 2.77\ \mathrm{{}^{\circ}C\ kg\ mol^{-1}}]