PYQ Vault

Day 18: MH HSC Class 12 Chemistry

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

  1. Question 1

    Amines. Asked 2 times: Mar 2017, Mar 2018

    Q.8.iii(OR)
    Explain Hoffmann bromamide degradation reaction.

  2. Question 2

    Transition and Inner Transition Elements. Asked 2 times: Mar 2014, Mar 2017

    Q.7.iii
    Write the different oxidation states of iron. Why +2+ 2 oxidation state of manganese is more stable? (Fe→Z=26\text{Fe} \rightarrow \text{Z} = 26, Mn→Z=25\text{Mn} \rightarrow \text{Z} = 25)

  3. Question 3

    Electrochemistry. This type asked 7 times: Mar 2016, Mar 2017, Mar 2018, Mar 2022, Feb 2024, Jul 2024, Feb 2025. This one: Feb 2025

    Q. 11
    How many coulombs of electricity is required to produce 1 g of sodium metal by reduction of sodium ion?

  4. Question 4

    Ionic Equilibria. This type asked 6 times: Mar 2023, Feb 2024, Jul 2024, Feb 2025, Jul 2025, Feb 2026. This one: Feb 2025

    Q. 16
    Define conjugate acid-base pair. The hydroxyl ion concentration in aqueous solution of NaOH is 2×10−4 mol dm−32 \times 10^{-4}\ \mathrm{mol\ dm^{-3}}. Calculate pH of the solution.

  5. Question 5

    Introduction to Polymer Chemistry. This type asked 6 times: Mar 2014, Mar 2023, Feb 2024, Jul 2024, Feb 2025, Jul 2025. This one: Jul 2025

    Answer the following questions :
    Q.2.ii
    Write name of monomer used to form nylon-6 polymer.