Characteristics of Solutions and Suspensions

The video tutorial explains how to prepare true solutions, suspensions, and colloidal solutions using common materials like salt, sugar, alum, soil, chalk, sand, starch, and egg albumin. It also covers the apparatus and chemicals required for these preparations. The tutorial further demonstrates how to distinguish between these mixtures based on transparency, filtration, and stability criteria.

What is the key characteristic of a true solution?

• It forms a thick paste.

• It forms a cloudy mixture.

• It forms a clear solution with no sediment.

• It forms a layer of sediment at the bottom.

What is the main difference between a true solution and a suspension?

• True solutions form sediments, suspensions do not.

• True solutions have large particles, suspensions have small particles.

• True solutions have dissolved particles, suspensions have suspended particles.

• True solutions are cloudy, suspensions are clear.

Which of the following is NOT a characteristic of a suspension?

• Particles settle over time.

• It appears cloudy.

• It is a homogeneous mixture.

• Particles do not dissolve.

What is observed when a suspension is left undisturbed for some time?

• It becomes more transparent.

• It turns into a true solution.

• The particles settle at the bottom.

• The particles dissolve completely.

How is a colloidal solution of starch prepared?

• By adding starch to a sugar solution.

• By mixing starch with boiling water after forming a milky suspension.

• By dissolving starch directly in cold water.

• By shaking starch with sand.

Which of the following is a characteristic of a colloidal solution?

• Particles settle quickly.

• It is a clear solution.

• It shows the Tyndall effect.

• It forms a solid mass.

What happens when a flashlight is shone through a colloidal solution?

• The light is reflected back.

• The light is scattered by the colloidal particles.

• The light is absorbed completely.

• The light passes through without scattering.

How can you distinguish a true solution from a colloidal solution using a filter paper?

• True solutions leave a residue on the filter paper.

• Colloidal solutions leave a clear filtrate.

• True solutions pass through without leaving a residue.

• Colloidal solutions pass through without leaving a residue.

Which solution type remains unchanged in consistency after standing for a period?

• Suspension

• Colloidal solution

• True solution

• Emulsion

What is the effect of shaking on the stability of a colloidal solution?

• It turns the solution into a suspension.

• It causes the particles to settle.

• It makes the solution clear.

• It does not affect the stability.