Question

The Tyndall effect 11) A) is caused by Brownian motion. B) is used to determine the osmotic pressure of solutions. C) is observed only in dilute solutions. D) is observed in concentrated solutions. E) is observed in colloidal dispersions.

Answer 1

The Tyndall effect is caused by Brownian motion

Step-by-step explanation:

Tyndall effect means the passing of light beams through a colloid medium.

When a light beam passes through a colloid fluid,the effect is called Tyndall effect and the random movement of particles in the colloidal substance is done by a motion called as Brownian motion.

This effect mainly occurs in colloid solution because it contain large particle that is responsible for scattering light beams into the solution.

Tyndall effect is used to distinguish between a solution and a colloidal mixture.

Answer 2

E) is observed in colloidal dispersions

Step-by-step explanation:

The Tyndall effect is the scattering of light as it passes through a colloidal dispersion. The dispersed particles scatter and reflect the light and make the beam visible.

A) is wrong. Brownian motion is the random movement of particles in a fluid due to their collisions with molecules of the fluid. The particles must be visible, so they are larger than colloidal particles (> 1000 nm).

(B) is wrong. Osmotic pressure is measured by determining the pressure developed across a semipermeable membrane.

C) and D) are wrong. The solute particles in a solution are too small (< 1 nm) to scatter light