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# Please solve this question with a detailed explanation.....I am unable to understand the question as well as the solution provided in the book

Asked by tirumalasandeep 12th April 2017, 3:48 PM

Correct option is (d)

Vapour density = 100

Molecular weight = 2 x VD

So equivalent molecular weight = 208.5/1+ α = 200

208.5 = 1+ α

200

1.04=1+ α

α= 0.04 or 4% is the degree of dissociation.

PCl5                ⇋                 PCl3 + Cl2

Mole at equilibrium                      1-α                                   α           α

Where α is degree of dissociation=0.04

i= 1- α +α + α

i = 1+ α

i =1 + 0.04=1.04

Answered by Expert 13th April 2017, 6:42 PM
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