NEET Chemistry The s-Block Elements / s-ब्लॉक के तत्व Sample Paper Self Evaluation Test - The s-Blcok Elements

  • question_answer
    The correct order of thermal stability of hydroxides is:

    A) \[Ba{{(OH)}_{2}}<Ca{{(OH)}_{2}}<Sr{{(OH)}_{2}}<Mg{{(OH)}_{2}}\]

    B) \[Mg{{(OH)}_{2}}<Sr{{(OH)}_{2}}<Ca{{(OH)}_{2}}<Ba{{(OH)}_{2}}\]

    C) \[Mg{{(OH)}_{2}}<Ca{{(OH)}_{2}}<Sr{{(OH)}_{2}}<Ba{{(OH)}_{2}}\]

    D) \[Ba{{(OH)}_{2}}<Sr{{(OH)}_{2}}<Ca{{(OH)}_{2}}<Mg{{(OH)}_{2}}\]

    Correct Answer: D

    Solution :

    [d] Stability of ionic compounds decreases with decrease in lattice enthalpy. Thus stability of alkaline earth metal hydroxide- decreases with decrease in lattice enthalpy as the size of alkali earth metal cations increases down the group.


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