A and B are two identical vessels. A contains 15 g ethane at 1 atm and 298 K. The vessel B contains 75 g of a gas X2 at same temperature and pressure. The vapour density of X2 is

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150

37.5

answer is A.

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Detailed Solution

Equate the number of moles of gases in A & B ( since volume is same)1530 =75MBMB=150 ; VDB=1502=75

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