Question

In two separate bulbs containing ideal gases A and B respectively the density of gas A is twice that of gas B while of gas B at same temperature ratio
Pa/Pb will be
A) 1/4
B) 1/2
C) 4
D) 1

Answer 1

Dear Student,

$$\begin{gathered} Densityofgas=\frac{Pressure\times Molecularmass}{RT} \\ d=\frac{PM}{RT} \\ itisgiven\frac{d_A}{d_B}=2 \\ =\frac{P_M\times M_A}{P_B\times M_B}=\frac{P_A}{P_B}\times \frac{1}{2} \\ hence, \\ \frac{P_A}{P_B}=4 \end{gathered}$$

Hence the answer is Option (C) 4

Regards.