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Question

The equilibrium constant for the reaction
Br22Br at 500 K and 700 K are 1×1010 and 1×105 respectively. The reaction is:-
(A) Endothermic (B) Exothermic (C) Fast (D) Slow

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Solution

The correct option is C

We have,

A22A

Kc=[A]2A2

Kc at 500k and 700k are 1×1010and 1×105.

This shows tha the formation of the A is favored with an increase in temperature.

So, reaction is not a slow reaction because with increase in temperature decomposition is favored

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