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Q.

What is the percentage dissociation of a substance if its vapour densities before and after dissociation are 30 and 15 respectively and 1 mole of its dissociation to 3 moles of products?

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a

75%

b

25%

c

50%

d

65%

answer is B.

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Detailed Solution

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α=D−dd(n−1)=30−1515(3−1)=152×15=12×100=50%

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What is the percentage dissociation of a substance if its vapour densities before and after dissociation are 30 and 15 respectively and 1 mole of its dissociation to 3 moles of products?