PYQ Vault

Day 73: MH HSC Class 12 Chemistry

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

  1. Question 1

    Electrochemistry. Asked once: Mar 2014 (same type asked 4 times)

    Q.1.i
    Resistance and conductivity of a cell containing 0.001 M KCl0.001\text{ M KCl} solution at 298 K298\text{ K} are 1500Ω and 1.46×10−4 S. cm−11.46 \times 10^{- 4}\text{ S. cm}^{- 1} respectively. What is the cell constant?

  2. Question 2

    Solutions. Asked once: Mar 2015 (same type asked 3 times)

    Q.3.ii
    1.0×10−2 kg1.0 \times 10^{- 2}\text{ kg} of urea when dissolved in 0.998 kg0.998\text{ kg} of a solvent, depresses freezing point of the solvent by 0.21 K0.21\text{ K}. Kf=1.6×10−5 K kg mol−1\text{K}_{f} = 1.6 \times 10^{- 5}\text{ K kg mol}^{- 1} of another non-electrolyte solute when dissolved in 0.086 kg0.086\text{ kg} of the same solvent depresses the freezing point by 0.34 K0.34\text{ K}. Calculate the molar mass of the another solute.

  3. Question 3

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

    Q.8.iii
    How many moles of acetic anhydride will be required to form glucose pentaacetate from 2 M2\text{ M} of\text{of} glucose?

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  4. Question 4

    Solid State. Asked once: Mar 2023 (same type asked 3 times)

    Q. 6
    Explain the following terms: (i) Substitutional impurity defect (ii) Interstitial impurity defect

  5. Question 5

    Electrochemistry. Asked once: Mar 2018 (same type asked 7 times)

    Q.3.iii
    How many Faradays of electricity are required to produce 13 gram of aluminum13\text{ gram of aluminum} from aluminium chloride solution? (Given: Molar mass of Al=27.0 gram mol−1\text{Al} = 27.0\text{ gram mol}^{- 1})