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Day 17: MH HSC Class 12 Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked 2 times: Mar 2017*, Mar 2022 (* = numbers or wording changed that year)

    Q.25
    Calculate the standard enthalpy of formation of CH3OH(l)\text{CH}_{3}\text{OH}(l) from the following data: (i) CH3OH(l)+32O2(g)→CO2(g)+2H2O(l)\text{CH}_{3}\text{OH}(l) + \frac{3}{2}\text{O}_{2}(g) \rightarrow \text{CO}_{2}(g) + 2\text{H}_{2}\text{O}(l), ΔH∘=−726 kJ mol−1\Delta\text{H}^{\circ} = - 726\text{ kJ mol}^{- 1} (ii) C(s)+O2(g)→CO2(g)\text{C}(s) + \text{O}_{2}(g) \rightarrow \text{CO}_{2}(g), ΔH∘=−393 kJ mol−1\Delta\text{H}^{\circ} = - 393\text{ kJ mol}^{- 1} (iii) H2(g)+12O2(g)→H2O(l)\text{H}_{2}(g) + \frac{1}{2}\text{O}_{2}(g) \rightarrow \text{H}_{2}\text{O}(l), ΔH∘=−286 kJ mol−1\Delta\text{H}^{\circ} = - 286\text{ kJ mol}^{- 1}

  2. Question 2

    Alcohols, Phenols and Ethers. Asked 2 times: Mar 2017, Feb 2020

    Q.10
    Explain continuous etherification process for the preparation of diethyl ether.

  3. Question 3

    Chemical Kinetics. Asked 2 times: Mar 2018, Feb 2020

    Q.2.viii
    Write the mathematical relation between half life of zero order reaction and its rate constant.

  4. Question 4

    Coordination Compounds. Asked 2 times: Mar 2019, Feb 2020

    Q.18
    Calculate the effective atomic number (E.A.N.\text{E.A.N.}) of copper in [Cu(NH3)4]2+\left\lbrack \text{Cu}\left( \text{NH}_{3} \right)_{4} \right\rbrack^{2 +} (Z\text{Z} of Cu=29\text{Cu} = 29). Explain ionisation isomerism in coordination compounds with a suitable example.

  5. Question 5

    Halogen Derivatives. Asked 2 times: Mar 2016, Feb 2020

    Q.1.v
    Conversion of methyl chloride into methyl fluoride is known as _____.

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