PYQ Vault

Day 49: 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. Asked once: Mar 2023 (same type asked 3 times)

    Q. 31(ii)
    Give reason: Group 16th16^{\text{th}} elements have lower ionisation enthalpy compared to group 15th15^{\text{th}} elements. Write two uses of dioxygen.

  2. Question 2

    Solid State. Asked once: Feb 2025 (same type asked 3 times)

    Q.30.a
    Define a unit cell. Which colour is shown by NaCl crystal due to formation of F-centre?

  3. Question 3

    Solutions. Asked once: Mar 2017 (same type asked 3 times)

    Q.4.i
    A solution of a substance having mass 1.8×10−3 kg1.8 \times 10^{- 3}\text{ kg} has the osmotic pressure of 0.52 atm0.52\text{ atm} at 286 K286\text{ K}. Calculate the molar mass of the substance used. [Volume=1 dm3,R=8.314 J K−1 mol−1]\left\lbrack \text{Volume} = 1\text{ dm}^{3},\text{R} = 8.314\text{ J K}^{- 1}\text{ mol}^{- 1} \right\rbrack.

  4. Question 4

    Aldehydes, Ketones and Carboxylic Acids. Asked once: Mar 2023 (same type asked 3 times)

    Q. 16(i)
    Convert the following: (i) Ethyl alcohol into ethyl acetate

  5. Question 5

    Chemical Kinetics. Asked once: Feb 2024 (same type asked 3 times)

    Q. 19
    For the reaction A+B→P\mathrm{A + B \rightarrow P}. If [B] is doubled at constant [A], the rate of reaction doubled. If [A] is triple and [B] is doubled, the rate of reaction increases by a factor of 6. Calculate the rate law equation.