Q. At NTP, the density of a gas, whose molecular weight is 45, is
A) 44.8 g/L
B) 11.4 g/L
C) 2 g/L
D) 3 g/L
Explanation
(c)
From gas equation,
$pM = d.RT$
$\therefore d = \frac{1 \times 45}{0.0821 \times 273}$
$\ \ \ \ \ \ \ = 2\ g/L$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.