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Question

The volume at STP of 5.6 grams of a gas whose vapour density is 5.6 is:

A
5.6 L
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B
11.2 L
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C
22.4 L
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D
44.8 L
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Solution

The correct option is C 11.2 L
Mol. wt. =2×V.D.=11.2

No. of moles of gas =5.611.2=1:2=0.5 moles

1 mole of gas occupies 22.4 litres at STP

0.5 moles of it will occupy 11.2 litres at STP
Hence, option B is correct.

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