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At 200^(@) C PCl(5) dissociates as follo...

At `200^(@) C PCl_(5)` dissociates as follow , `PCl_(s(g)) hArr PCl_(3(g)) + Cl_(2(g)) `. It was found that the equilibrium vapour. are 62 times as heavy as hydrogen. The degree of dissociation of `PCl_(5)` at `200^(@)` C is nearly.

A

`10%`

B

`42%`

C

`50%`

D

`68%`

Text Solution

Verified by Experts

The correct Answer is:
d
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