Q. Equal masses of ethane and hydrogen are mixed in an empty container at $25℃$. The fraction of the total pressure exerted by hydrogen is
A) 1 : 2
B) 1 : 1
C) 1 : 16
D) 15 : 16
Explanation
(d)
Moles of $H_{2} = \frac{w}{2},$ and ethane $= \frac{w}{30}$
Total mo. of moles $= \frac{w}{2} + \frac{w}{30} = \frac{16w}{30}$
Partial pressure of $H_{2} = p \times \frac{w/2}{16w/30}\ = \frac{w}{2} \times \frac{30}{16w} = \frac{30}{32} = \frac{15}{16}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.