Class 9 Science Chapter 2 MCQ (Multiple Choice Questions) of Is Matter Around us pure? All the questions are important for class unit tests and school’s terminal exams. MCQ Online tests take less time to revise any chapter. So, Student can revise the entire chapter 2 of class 9 science in less time. These MCQ questions contain all intext and exercises questions also in the form of objective questions.

Class: 9Science
Chapter: 2Is Matter Around us pure?
Contents:MCQ Online Test with Answers

Class 9 Science Chapter 2 MCQ with Answers for 2022-2023

Class 9 Science Chapter 2 MCQ Online tests with solution and explanation. There are about 70 questions in the form of objectives with four choices. These MCQ covers the entire chapter of grade 9 Science NCERT Chapter 2. For the preparation of unit tests or terminal exams, students may use these questions as revision.

Q1

Two substances, A and B were made to react to form a third substance, A2B according to the following reaction 2 A + B → A2B. Which of the following statements concerning this reaction are incorrect?

[A]. The product A2B shows the properties of substances A and B. The product will always have a fixed composition, the product so formed cannot be classified as a compound.
[B]. The product will always have a fixed composition. The product so formed cannot be classified as a compound, the product so formed is an element.
[C]. The product A2B shows the properties of substances A and B. The product so formed cannot be classified as a compound. The product so formed is an element.
[D]. The product will always have a fixed composition. The product so formed cannot be classified as a compound, the product so formed is an element.
Q2

Anushka is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Anushka wants to take help from you:

[A]. An element cannot be split up into two or more simpler substances because it is made of only one kind of atoms.
[B]. There are 118 elements known at present, out of which 94 elements, occur in nature while the remaining 24 elements have been prepared artificially.
[C]. 11 elements are gases whereas only two elements mercury and bromine a liquid at room temperature.
[D]. All of the above
Q3

Which of the following are physical changes?

[A]. Melting of iron metal, Rusting of iron, Bending of an iron rod
[B]. Melting of iron metal, Rusting of iron, Drawing a wire of iron metal
[C]. Melting of iron metal, Bending of an iron rod, Drawing a wire of iron metal
[D]. Rusting of iron, Bending of an iron rod, Drawing a wire of iron metal
Q4

Which of the following are homogeneous in nature?

[A]. Ice, soil
[B]. Wood, air
[C]. Ice, air
[D]. Soil, air
Q5

Which of the following statements are true for pure substances?

[A]. Pure substances contain only one kind of particles, pure substances may be compounds or mixtures.
[B]. Pure substances contain only one kind of particles; pure substances have the same composition throughout.
[C]. Pure substances have the same composition throughout, pure substances can be exemplified by all elements other than nickel.
[D]. Pure substances may be compounds or mixtures, pure substances have the same composition throughout.
Q6

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. The solution made by dissolving solute in organic liquids are called non aqueous solutions.
[B]. The substance which is dissolved in a liquid to make a solution is called solvent.
[C]. The solute particles are also called “dispersed particles” and solvents are also known as “dispersion medium”.
[D]. None of the above.
Q7

Consider the following statements and choose the incorrect one:

[A]. The process of evaporation is used on a large scale to obtain common salt from seawater.
[B]. The substance like potash alum and potassium nitrate are also separated from their water solution by the process of evaporation.
[C]. we can separate the “colored component of ink” by the process of evaporation.
[D]. The use of process of condensation for separating a mixture is based on the fact that liquids vaporize easily whereas solid do not vaporize easily.
Q8

Read the following sentences carefully, and choose the correct one:

[A]. Distillation is a process of heating a liquid to form vapour, and then cooling the vapour to get back liquid.
[B]. Chromatography is a technique of separating two or more dissolved solids which are present in a solution in very small quantities.
[C]. Black ink is a mixture of several colored substance or dyes which can be separated by paper chromatography.
[D]. All the above
Q9

In a science quiz competition, Dhani are asked a question where she had to choose the statement which was/were incorrect?

[A]. Fractional distillation is the process of separating two or more miscible liquids by distillation.
[B]. A mixture of immiscible liquids is separated by using an apparatus called separating funnel.
[C]. A mixture of alcohol and water can be separated by fractional distillation.
[D]. Crystallization is not better technique than evaporation of dryness.
Q10

Which of the following are physical changes?

[A]. Melting of iron metal, rusting of iron metal, bending of an iron rod.
[B]. Melting of iron metal, rusting of iron metal, drawing a wire of iron metal.
[C]. Melting of iron metal, bending of an iron rod, drawing a wire of iron metal.
[D]. Rusting of iron metal, bending of an iron rod, drawing a wire of iron metal.

What is a Solution?

A solution is a homogeneous mixture of two or more substances.

What are the main constituents of air?

The two main constituents of air are oxygen (21%) and nitrogen (78%).

What is Suspension?

A non-homogeneous systems in which solids are dispersed in liquids, are called suspensions. A suspension is a heterogeneous mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium.

Write down two properties of Colloids?

1. Colloids are big enough to scatter a beam of light passing through it and make its path visible.
2. They do not settle down when left undisturbed, that is, a colloid is quite stable.

Updated Contents and NCERT Solutions

We update NCERT Textbook Solutions and other study material as per the change of syllabus or on demand of students also. Provide feedback to improve the quality of the contents. Every thing on Tiwari Academy is free to use.