Q.

The compounds A and B are mixed in equimolar proportion to from the products, A+BC+D. At equilibrium, one third of A and B are consumed. The equilibrium constant for the reaction is

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a

0.5

b

0.25

c

4.0

d

2.5

answer is D.

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Detailed Solution

A+BC+D

At: t=0:1+1 0+0

At: t=teq: (2/3)+(2/3) (1/3)+(1/3)

Explanation: Kc=[C][D]/[A][B]=(1/3)(1/3)/(2/3)(2/3)=¼=0.25

Hence, the correct option D is i.e., 0.25.

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