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Q.

In the reaction AB(g)⇌A(g)+B(g) at 30°C, Kp for the dissociation equilibrium is 2.56x 10-2 atm. If the total pressure at equilibrium is 1 atm, then the percentage dissociation of AB is

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a

87%

b

13%

c

43.5%

d

16%

answer is D.

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Detailed Solution

AB(g)⟶A(g)+B(g)
Applying law of mass action
Kp=α2p1−α2α21−α=2.56×10−2          [  ∴( 1-α)=1]⇒α2=2.56×10−2⇒α=2.56×10−2⇒α=0.16
% age dissociation = 16%

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