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Colloids and Their Properties

Colloids and Their Properties

Assessment

Interactive Video

Chemistry, Science, Physics

9th - 10th Grade

Practice Problem

Easy

Created by

Patricia Brown

Used 1+ times

FREE Resource

The video tutorial introduces colloids and the Tyndall effect, explaining that colloids are mixtures where one phase is dispersed into another. It discusses the particle size differences between solutions, colloids, and suspensions. The preparation of colloids is demonstrated using potassium permanganate and manganese sulfate. The Tyndall effect, which is the scattering of light by colloidal particles, is explained with examples. The video concludes with a call to action for viewers to engage with the channel.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a colloid?

A homogeneous mixture with large particles

A suspension with particles larger than 2000 angstrom

A heterogeneous mixture with intermediate particle size

A solution with particles smaller than 10 angstrom

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a true solution?

Colloidal manganese dioxide

Potassium permanganate solution

Suspension of manganese dioxide

Colloidal silver

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can colloids be prepared?

By reducing potassium permanganate with a reducing agent

By evaporating a suspension

By dissolving a solid in a solvent

By mixing two solutions

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which reducing agent is NOT mentioned for preparing colloids?

Hydrochloric acid

Formic acid

Manganese sulfate

Sodium thiosulfate

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the Tyndall effect?

The reflection of light by solutions

The scattering of visible light by colloidal particles

The absorption of light by colloidal particles

The refraction of light by suspensions

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why do colloids exhibit the Tyndall effect?

Because they absorb light

Because they reflect light

Because their particles are large enough to scatter light

Because their particles are too small to scatter light

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when light passes through a true solution?

The light is absorbed

The light is scattered

The light is reflected

The light passes through without scattering

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