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Question

At 30C,Kp for the dissociation reaction:
SO2Cl2 (g) SO2 (g) + Cl2 (g) is 2.9x 102~atm. If the total pressure is 1 atm, the degree of dissociation of SO2Cl2 is (assume 1α2 =1)

A
85%
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B
12%
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C
17%
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D
35%
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Solution

The correct option is C 17%
Correct option is c).
SO2Cl2(g) SO2(g)+Cl2(g)100 1α αα
Total moles = 1+α
Pso2Cl2=1α/1+α,Pso2=α/1+α,Pcl2=α/1+α
Kp=(α /1+α)2/(1α/1+α)=α2/1α2 α2
α=Kp=(2.9×102=0.17,i.e., 17%

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