For the hypothetical reaction A(g)⇌B(g) at 450 K the value of equilibrium constant is 102 and the value of equilibrium constant becomes 0.5 at 810 K.ΔH for the reaction,
A(g)B(g) will be 

  1. A

    Positive

  2. B

    Negative

  3. C

    Zero

  4. D

    Cannot be predict

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    Solution:

    'Keq' decreases with increase in temperature. The reaction is exothermic.

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