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Q.

The vapour density of PCl5 is 104.25 but when heated to 2300C, its vapour density reduced to 62. The decomposition of PCl5 isPCl5⇌PCl3+Cl2 . Calculate the degree of decomposition of  PCl5

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a

0.68

b

0.42

c

0.36

d

0.86

answer is B.

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Detailed Solution

α=D−dn−1d=104.25−622−1×62=0.68

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