Question

Consider the following statements and arrange in the order of true/false as given in the codes.
$S_1$: Colour of a colloidal solution depends upon the size and shape of sol particles.
$S_2$: Brownian motion is due to continuous bombardment of sol particles by molecules of dispersion medium.
$S_3$: When negatively charged smoke comes in contact with positively charged clouds, rain fall takes place.
$S_4$: For a positive sol, flocculation values are in the order of $NaCl>K_{2}S{O}_4>N{a}_{3}P{O}_4>K_4\left[Fe\right(CN{)}_6]$.

• A. TTTT
• B. TTFF
• C. TFTF
• D. FFFF

Answer 1

The correct option is A TTTT

A) Colour of a colloidal solution depends upon the size and shape of sol particles. So, different sized colloidal particles have different colour.
B) Brownian movement is due to collision between solution phase particles and dispersion medium particles.
C) When negatively charged smoke comes in contact with positively charged clouds, rain fall takes place. This is because of coagulation of mist particles in air.
D) Flocculation value is directly proportional to $\frac{1}{\text{charge on effective ion}}$.

So, the order is $NaCl>K_{2}S{O}_4>N{a}_{3}P{O}_4>K_4\left[Fe\right(CN{)}_6]$.

Hence, all statements are true.