1.

Vapour density of a compound is defined as the ratio of mass of a certain volume of gas to the mass of the same volume of hydrogen gas under conditions of temperature and pressure. Vapour density=("Mass of certain of gas"(22.4L)"atSTP")/("Mass of same volume of" H_(2) "gas"(22.4L)"at STP") =(Mw)/(2) i.e., Molecular mass of gas=Vapour density xx2 Vapour density is a unitless quantity it is unaffected by variation of temperature and pressure. At STP, 5.6 litre of a gas weighs 60g. the vapour density of gas is:

Answer»

60
120
30
240

Answer :B


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