PYQ Vault

Day 77: 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 2026

    Q. 23(ii)
    What is the action of ethane – 1, 2 – diol on acetone?

  2. Question 2

    Amines. Asked once: Jun 2026

    Q. 17(iii)
    Write chemical reaction for conversion of benzene diazonium chloride into benzene.

  3. Question 3

    Biomolecules. Asked once: Jun 2026

    Q. 5
    Draw the structures of two forms of alanine having pH≤2\mathrm{pH} \le 2 and pH≥10\mathrm{pH} \ge 10.

  4. Question 4

    Chemical Kinetics. Asked once: Jul 2024

    Select and write the correct answer for the following multiple choice type of questions :
    Q.1.i
    Integrated rate law equation for a zero order reaction is −-

    Tap an option to check your answer.

  5. Question 5

    Chemical Thermodynamics. Asked once: Jul 2025

    Answer the following questions :
    Q.2.viii
    When 6.0 g of O2\mathrm{O_2} reacts with ClF as per 2ClF(g)+O2(g)⟶Cl2O(g)+OF2(g)\mathrm{2ClF_{(g)} + O_{2(g)} \longrightarrow Cl_2O_{(g)} + OF_{2(g)}} The enthalpy change is 38.55 kJ. Calculate the standard enthalpy of the reaction.