PYQ Vault

Day 20: MH HSC Class 12 Chemistry

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

  1. Question 1

    Transition and Inner Transition Elements. This type asked 5 times: Mar 2017, Feb 2020, Feb 2024, Jul 2024, Feb 2026. This one: Feb 2026

    Q. 22(ii)
    The salt of Sc3+\mathrm{Sc^{3+}} ion is colourless and the salt of Mn3+\mathrm{Mn^{3+}} ion is coloured. Explain. [Z of Sc = 21 and Z of Mn = 25]

  2. Question 2

    Alcohols, Phenols and Ethers. This type asked 5 times: Mar 2017, Mar 2022, Mar 2023, Feb 2024, Jul 2025. This one: Mar 2023

    Q.31
    Write Dow process for preparation of Phenol. What is the action of bromine water on phenol?

  3. Question 3

    Solid State. This type asked 5 times: Mar 2023, Feb 2024, Jul 2024, Feb 2025, Jul 2025. This one: Feb 2025

    Q.27.a
    An element with molar mass 27 g/mol forms a cubic unit cell with edge length 405 pm. If density of the crystal is 2.7 g cm−32.7\ \mathrm{g\ cm^{-3}}, identify the type of unit cell.

  4. Question 4

    Coordination Compounds. This type asked 5 times: Mar 2014, Mar 2016, Mar 2018, Mar 2023, Feb 2024. This one: Feb 2024

    Select and write the correct answer for the following multiple choice type of questions :
    Q.1.v
    The correct structure of complex having IUPAC name sodium hexanitrocobaltate (III) is

    Tap an option to check your answer.

  5. Question 5

    Aldehydes, Ketones and Carboxylic Acids. This type asked 4 times: Feb 2020, Mar 2023, Feb 2026, Jun 2026. This one: Feb 2026

    Q. 30(i)
    Convert, ethanoic acid to ethanol.