Q. The volume of a colloidal particle, $V_{C}$ as compared to the volume of a solute particle in a true solution $V_{S},$ could be
A) $\frac{V_{C}}{V_{S}} \approx 10^{3}$
B) $\frac{V_{C}}{V_{S}} \approx 10^{- 3}$
C) $\frac{V_{C}}{V_{S}} \approx 10^{23}$
D) $\frac{V_{C}}{V_{S}} \approx 1$
Explanation
(a)
Size of colloidal particles =1 to 100 nm (say 10 nm).
$V_{C} = \frac{4}{3}\pi r^{3} = \frac{4}{3}\pi(10)^{3}$
Size of true solution particles $\approx$1 nm
$V_{S} = \frac{4}{3}\pi(1)^{3}$
Thus,$\frac{V_{C}}{V_{S}} = 10^{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.