Equal volumes of the gases which do not react together are confined in separate vessels. The pressure is $$200\,mm$$ and $$400\,mm$$ of $$Hg$$
respectively. If the two gases are mixed together what will be the pressure of the resulting mixture (temperature remaining constant)
A.
$$400\,mm$$
B.
$$\sqrt {400} \,mm$$
C.
$$300\,mm$$
D.
$$200\,mm$$
Answer :
$$300\,mm$$
Solution :
When vessels are joined the volume is doubled and pressure is reduced to half \ Pressure of mixture
$$ = \frac{{200}}{2} + \frac{{400}}{2} = 300\,mm$$
Releted MCQ Question on Physical Chemistry >> States of Matter Solid, Liquid and Gas
Releted Question 1
Equal weights of methane and oxygen are mixed in an empty container at $${25^ \circ }C.$$ The fraction of the total pressure exerted by oxygen is