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For $large A, + ,B, rightleftharpoons ,C + D$ , $large Delta H, = , - QKJ$ , K_f and K_b respectively are 0.25 and 5000 at 400K. Now, K_c for same process at 500K may be

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answer is A.

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Detailed Solution

A + B $⇌$ C + D, ΔH = -QKJ

At 400 K K_f = 0.25; K_b = 5000

large {K_{eq}} = frac{{0.25}}{{5000}} = 5 times {10^{ - 5}}

the reaction is exothermic at higher temperature, 500 K value of K_eq will be lesser than

By inspection option (1) is the only value which is lesser than

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