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Q.

At 227⁰C and 4 atm, PCl₅ is dissociated to an extent 50%. At same temperature, extent of dissociation of PCl₅ is 0.75 at a pressure of

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a

1.77atm

b

2 atm

c

4 atm

d

8 atm

answer is A.

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Detailed Solution

$α \infty {(p)}^{- \frac{∆ n_{g}}{2}}$

$\frac{α_{1}}{α_{2}} = \sqrt{\frac{p_{2}}{p_{1}}} \frac{0.5}{0.75} = \sqrt{\frac{p_{2}}{4}} p_{2} = \frac{16}{9} = 1.77$

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