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

The rusting of an iron object is called:

[A]. Corrosion and it is a physical as well as a chemical change
[B]. Dissolution and it is a physical change
[C]. Corrosion and it is a chemical change
[D]. Dissolution and it is a chemical change
Q2

Which of the following are chemical changes?

[A]. Decaying of wood, Burning of wood
[B]. Burning of wood, Sawing of wood
[C]. Sawing of wood, Hammering of a nail into a piece of wood
[D]. Decaying of wood, Hammering of a nail into a piece of wood
Q3

On the basis of composition of matter, milk is considered to be :

[A]. A pure substance
[B]. An impure substance
[C]. An element
[D]. A compound
Q4

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. The electric wires are made of copper and Aluminium metals because they are very good conductors of electricity.
[B]. Only one metal, mercury, is in liquid state at room temperature.
[C]. Metal gallium has a such a low melting point that it starts melting in hand by the heat of our body.
[D]. Sodium and potassium metals have high densities than iron.
Q5

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.
Q6

Pooja is writing some statements but she confused to know why water is considered as a compound and not a mixture. If you know the answer to this question, help her to choose the incorrect statements:

[A]. Water cannot be separated into its constituent’s hydrogen and oxygen by the physical methods.
[B]. It contains hydrogen and oxygen combined together in a fixed proportion of 1 : 9 by mass.
[C]. Heat and light are given out when water is prepared by burning hydrogen in oxygen.
[D]. None of the above.
Q7

Which of the following statement is or are incorrect?

[A]. A solution in which more quantity of solute can be dissolved without raising its temperature, is called an unsaturated solution.
[B]. A solution in which no more solute can be dissolved at that temperature is called a saturated solution.
[C]. If a saturated solution at a particular temperature is heated to a higher temperature, then it becomes unsaturated.
[D]. None of the above.
Q8

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.
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.

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