PYQ Vault

Day 66: MH HSC Class 12 Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: Mar 2014 (same type asked 3 times)

    Q.4.vi
    A system absorbs 640 J640\text{ J} heat and does work of 260 J260\text{ J}, the change in internal energy of the system will be ______.

    Tap an option to check your answer.

  2. Question 2

    Coordination Compounds. Asked once: Mar 2022 (same type asked 3 times)

    Q.21
    Explain cationic, anionic and neutral sphere complexes with example.

  3. Question 3

    Elements of Groups 16, 17 and 18. Asked once: Mar 2022 (same type asked 3 times)

    Q.9
    Explain the trends in the following atomic properties of group 16 elements: i. Atomic radii ii. Ionisation enthalpy iii. Electronegativity iv. Electron gain enthalpy.

  4. Question 4

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

    Select and write the correct answer for the following multiple choice type of questions :
    Q.1.i
    Schottky defect is NOT observed in _____.

    Tap an option to check your answer.

  5. Question 5

    Solutions. Asked once: Mar 2014 (same type asked 3 times)

    Q.2.ii
    Calculate the amount of CaCl2\text{CaCl}_{2} (van’t Hoff factor i=2.47\text{van’t Hoff factor i} = 2.47) dissolved in 2.5 L2.5\text{ L} solution so that its osmotic pressure at 300 K300\text{ K} is 0.75 atmosphere0.75\text{ atmosphere}. Given: Molar mass of CaCl2\text{CaCl}_{2} is 111 g mol−1111\text{ g mol}^{- 1}. R=0.0821 atm dm3 K−1 mol−1\text{R} = 0.0821\text{ atm dm}^{3}\text{ K}^{- 1}\text{ mol}^{- 1}.