Question

Two gases $ A $ and $ B $ having same pressure $ P $ , volume $ V $ and absolute temperature $ T $ are mixed. If the mixture has the volume and temperature as $ V $ and $ T $ respectively, then the pressure of the mixture is

• A. $ 2\,P $
• B. $ P $
• C. $ \frac{P}{2} $
• D. $ 4\,P $

Answer 1

Answer: (A)

The total pressure exerted by a mixture of non-reacting gases occupying a vessel is equal to the sum of the individual pressures which each gas exert if it alone occupied the same volume at a given temperature.
For two gases
$P=P_{1}+P_{2}=P+P=2 P$