PYQ Vault

Day 52: 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: Jul 2025 (same type asked 2 times)

    Answer the following questions :
    Q.2.vi
    Write IUPAC name for the structure shown : a benzene ring carrying a −CO−CH3\mathrm{{-}CO{-}CH_3} group and, on the adjacent ring carbon, a −Cl\mathrm{{-}Cl} atom.

  2. Question 2

    Chemical Kinetics. Asked once: Feb 2025 (same type asked 2 times)

    Q. 24
    Define zero order reaction. A reaction takes place in two steps : (i) NO(g)+Cl2(g)→NOCl2(g)\mathrm{NO_{(g)} + Cl_{2(g)} \rightarrow NOCl_{2(g)}} (ii) NOCl2(g)+NO(g)→2NOCl(g)\mathrm{NOCl_{2(g)} + NO_{(g)} \rightarrow 2NOCl_{(g)}} Write the overall reaction and identify the reaction intermediate.

  3. Question 3

    Chemical Kinetics. Asked once: Mar 2019 (same type asked 2 times)

    Q.29.A
    The rate of a first order reaction, A→B\text{A} \rightarrow \text{B} is 5.4×10−6 Ms−15.4 \times 10^{- 6}\text{ Ms}^{- 1} when [A]\left\lbrack \text{A} \right\rbrack is 0.3 M0.3\text{ M}. Calculate the rate constant of the reaction.

  4. Question 4

    Halogen Derivatives. Asked once: Feb 2024 (same type asked 2 times)

    Q.10.b
    Write preparation of ethyl cyanide from ethyl bromide.

  5. Question 5

    Aldehydes, Ketones and Carboxylic Acids. Asked once: Mar 2022 (same type asked 2 times)

    Q.23
    Write the classification of aliphatic ketones with example. What is the action of sodium hypoiodite on acetone?.