Question

Relative density of a volatile substance with respect to $C{H}_4$ is 4.Its molecular weight would be-

• A. 8
• B. 32
• C. 64
• D. 128

Answer 1

Answer: (C)

64

Relative density = density of substance/

density of reference

and for gases, under identical conditions it becomes,

Relative density = mass of substance/

mass of reference

Acc to question,

4 = x / 16

x = 64

so, molecular weight of substance is 64.