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Q.

Consider the following reaction taking place in 1 L capacity container at 300 K

A+B⇌C+D

If one mole each of A and B are present initially and at equilibrium 0.7 mol of C is formed, then equilibrium constant (KC) for the reaction is 

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a

1.2

b

5.4

c

6.2

d

9.7

answer is C.

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Detailed Solution

detailed_solution_thumbnail

A+B⇌C+D

Initial 1 mole1 mole00
at equilibrium1-x1-xxx

x is degree of dissociation
given x=0.7
[A]=1-0.7=0.3 
[" " B]=1-0.7=0.3 
[C]=0.7 
[D]=0.7 
KC=[C][D][A][B]=0.7×0.70.3×0.3=499=5.4

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