Question

The empirical formula of a gaseous compound is CH₂ .The density of the compound is 1.25 gm/lit.at S.T.P. The molecular formula of the compound is :

A)C₂H₄

b)C₃H₆

C)C₆H₁₂

D)C₄H₈

 

Answer 1

The correct option is A) C₂H₄ 

_{explaination:} 

_{Since, 1 lite contains 1.25 gms.
Hence 22.4 litres contain(1.25×22.4)gms≡28gms.
So molar mass ≡28gms/mass=} C₂H₄