Q. The osmotic pressure of 0.2 molar solution of urea at $27℃$ (R=0.082 L atm $mol^{- 1}K^{- 1}$)is
A) 4.92 atm
B) 1 atm
C) 0.2 atm
D) 27 atm
Explanation
(a)
$\pi$ =CRT
Hence, C =0.2 M
R =0.082 L atm $mol^{- 1}K^{- 1}$
T =27+273 = 300 K $\ \ \ \ \ \ \$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \pi$ =0.2$\times 0.082 \times 300\ K$
=4.92 atm.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.