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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Sample Paper Topic Test - Chemical Equilibrium

  • question_answer
    The equilibrium constant K for the reaction \[2H{{I}_{(g)}}\rightleftharpoons {{H}_{2(g)}}+{{I}_{2(g)}}\] at room temperature is 2.85 and that at 698 K is \[1.4\times {{10}^{-2}}\]. This implies that:

    A) HI is an exothermic compound

    B) HI is very stable at room temperature

    C) HI is relatively less stable than \[{{H}_{2}}\] and \[{{I}_{2}}\]

    D) HI is resonance stabilized

    Correct Answer: C

    Solution :

    [c] \[{{K}_{c}}\] decreases with temperature, i.e., reaction is exothermic or energy of HI is more than \[{{H}_{2}}\] and \[{{I}_{2}}\] or HI is less stable than \[{{H}_{2}}\] and \[{{I}_{2}}\].


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