Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weight of A and B is :
Answer & explanation
Correct answer: option 3
Ideal Gas Equation : PV = nRT
P = \(\frac{\rho}{M}RT\)
⇒ M ∝ \(\frac{\rho}{P}\)
\(\frac{M_1}{M_2} = \frac{3}{4}\)