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Q.

10 g of hydrogen fluoride gas occupy 5.6 litre of volume at NTP. The empirical formula of the gas is HF. The molecular formula of the gas will be: (atomic mass of fluorine =19)

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a

H3F3

b

HF

c

H4F4

d

H2F2

answer is C.

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Detailed Solution

PV=wMRT1×5.6=10M×22.4273×273    [R=22.4273=0.0821]∴ m=40
or Formula is (HF)2 as molar mass of HF is 20.

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