Question

Containers $A,B$ and $C$ of equal volume contain oxygen, neon and methane respectively at the same temperature and pressure. The correct increasing order of their masses is :

• A. A>B>C
• B. A>C>B
• C. B>A>C
• D. C>A>B

Answer 1

The correct option is A A>B>C

We know that

density $=\frac{\text{mass}}{\text{volume}}$

Volume $=\frac{\text{mass}}{\text{density}}\to mass=volume\times density$
here

$A=O_2$

$B=Ne$

$C=C{H}_4$

Here volume is same so mass only depend on the

density of atom

for density $O_2=1.429g/m$ or den. of mass = $O_2>Ne>C{H}_4$

$=A>B>C$

$Ne=0.9002g/m$

$C{H}_4=0.656g/mol$

here option $C+D$ both are same