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Q.

Calculate the percentage change in Mavg of the mixture, if PCl5 undergoes 50% decomposition.

PCl5→PCl3+Cl2

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a

50%

b

66.66%

c

33.33 %

d

 Zero

answer is C.

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Detailed Solution

α=MT−Mavg(n−1)⋅Mavg⇒Mavg=208.51.5

% change =1−11.5×100 =33.33%

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