Question

A 0.5 dm3 flask contains gas A and 1 dm3 flask contains gas B at the same temperature. If density of A = 3 g/dm3 and that of B = 1.5 g/dm3 and the molar mass of A = 1/2 of B, the ratio of pressure exerted by gases is :

• A. $\frac { \mathrm { P } _ { \mathrm { A } } } { \mathrm { P } _ { \mathrm { B } } } = 2$
• B.
• C. $\frac { \mathrm { P } _ { \mathrm { A } } } { \mathrm { P } _ { \mathrm { B } } } = 4$
• D.

Answer 1

Answer: (C)

$\frac { \mathrm { P } _ { \mathrm { A } } } { \mathrm { P } _ { \mathrm { B } } } = 4$

Answer 2

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