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Chemistry — Is Matter Around Us Pure

50 Questions Class 9 MCQs
25:00 ⏱ Time
⚡ Progress 0 / 50 answered
1
Which of the following is a pure substance?
2
Which of the following is a mixture?
3
What is a homogeneous mixture?
4
Which of the following is an example of a heterogeneous mixture?
5
The dispersed phase in a colloidal solution is:
6
Which of the following is an example of a colloidal solution?
7
In the Tyndall effect, the scattered light is observed when a beam passes through:
8
Which of the following methods can be used to separate a mixture of sand and water?
9
Which of the following is a property of a pure substance?
10
What is the nature of a suspension?
11
Which of the following is an example of a suspension?
12
The process of separating a solid from a liquid by heating the liquid to form vapor and then condensing the vapor is called:
13
Which of the following is the dispersion medium in milk?
14
Which of the following mixtures can be separated by the process of chromatography?
15
In a colloidal solution, the particles are:
16
What happens when a beam of light passes through a colloidal solution?
17
Which of the following is not a method of separating mixtures?
18
Which of the following is a true solution?
19
The Tyndall effect is observed in:
20
Which of the following mixtures shows the Tyndall effect?
21
Which of the following methods can be used to separate a solid dissolved in a liquid?
22
Which is the correct order of separation techniques based on the particle size?
23
Which of the following is the characteristic of a colloidal solution?
24
What happens when a colloidal solution is allowed to stand undisturbed for a long time?
25
What is the role of a dispersion medium in a colloidal solution?
26
Which of the following is the best example of a homogeneous mixture?
27
Which of the following methods is best suited for separating a mixture of salt and water?
28
Which type of mixture is formed when a substance dissolves in water?
29
Which of the following is a property of a suspension?
30
What is the separation method used to separate a mixture of two liquids with different boiling points?
31
Which of the following can be used to separate colored pigments from a mixture?
32
What is the Tyndall effect in colloidal solutions?
33
Which of the following mixtures shows the Tyndall effect?
34
Which of the following is true about colloids?
35
Which is the best method to separate a mixture of sand and salt?
36
Which of the following is an example of a colloid?
37
The components of a heterogeneous mixture can be separated by:
38
Which of the following is not a colloidal system?
39
Which of the following is true about a homogeneous mixture?
40
Which method is used to separate components of a mixture based on their solubility?
41
Which of the following is an example of a heterogeneous mixture?
42
What is the dispersion medium in a colloidal solution of air in water?
43
Which of the following is an example of a suspension?
44
In which of the following mixtures can the components not be separated by filtration?
45
Which of the following methods can be used to separate a mixture of oil and water?
46
Which of the following is a characteristic of a colloidal solution?
47
In a true solution, the solute particles are:
48
Which of the following is an example of a homogeneous mixture?
49
Which is the most effective method for separating a mixture of ink and water?
50
Which of the following methods can

Frequently Asked Questions

A pure substance consists of only one kind of particles with a fixed composition throughout.

Impurities are unwanted substances mixed with a pure substance that alter its composition and properties.

Elements and compounds are the two categories of pure substances.

An element is a substance made up of only one type of atom, for example, hydrogen or oxygen.

A compound is a pure substance formed by the chemical combination of two or more elements in fixed proportions.

Water (H2O) is a compound made from hydrogen and oxygen.

A mixture is a combination of two or more substances physically mixed but not chemically combined.

Mixtures are of two types: homogeneous and heterogeneous.

A homogeneous mixture has uniform composition and appearance throughout, like salt dissolved in water.

A heterogeneous mixture has visibly different components and non-uniform distribution, like sand in water.

Sugar solution and air are homogeneous mixtures.

Oil and water, and soil are heterogeneous mixtures.

A solution is a homogeneous mixture of two or more substances, including a solute and solvent.

The substance present in smaller amount that dissolves in a solvent is called a solute.

The substance in which the solute dissolves to form a solution is called the solvent.

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