Q. 10 g each of $CH_{4}\ and\ O_{2}$ are kept in cylinders of same volume under same temperatures, give the pressure ratio of two gases
A) 2 : 1
B) 1 : 4
C) 2 : 3
D) 3 : 4
Explanation
(a)
$pV = nRT$
$V = same$
$R = constant$
$T = same$
$p \propto n$
$or\ \ p \propto \frac{w}{M}\ but\ w\ is\ same.$
$So,\ p \propto \frac{1}{M}$
$\frac{p_{CH_{4}}}{p_{O_{2}}} = \frac{M_{O_{2}}}{M_{{CH}_{4}}} = \frac{32}{16} = \frac{2}{1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.