Q24 / 90 · JEE Main 2019 (10 Apr Shift 2) · Chemistry

The correct option among the following is.

  • A
    Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.
  • Correct answer
    B
    Colloidal particles in lyophobic sols can be precipitated by electrophoresis.
  • C
    Colloidal medicines are more effective because they have small surface area.
  • D
    Addition of alum to water makes it unfit for drinking.

Solution

Brownian motion of colloidal particle depends on size of particles.
Colloidal medicines are better because of their large surface area.
Electrophoresis is used for ppt. of lyophobic colloid. In electrophoresis precipitation occurs at the electrode which is oppositely charged.

Hence, the correct answer is option: 'B'.

Relevant Questions