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 2023-2024

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

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
Q2

A mixture of sulphur and carbon disulphide is:

[A]. Heterogeneous and shows Tyndall effect
[B]. Homogeneous and shows Tyndall effect
[C]. Heterogeneous and does not show Tyndall effect
[D]. Homogeneous and does not show Tyndall effect
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

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

[A]. In a colloidal solution or colloid the particles are big enough to scatter light.
[B]. The scattering of light by colloidal particles is known as “Tyndall effect”.
[C]. Colloids are heterogeneous in nature, though they appear to be homogeneous.
[D]. The particles of most of the colloids can be seen with a microscope.
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

Which of the following statement is or are incorrect?

[A]. Centrifugation is a method for separating the suspended particles of a substance from a liquid in which the mixture is rotated at a high speed in a centrifuge.
[B]. The process of centrifugation is used in dairies to separate cream from milk.
[C]. The separation of a dissolved solids from a liquid can be done by only one methods as evaporation.
[D]. None of the above.
Q9

Nitika is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. A mixture of common salt and water can be separated completely by the process of distillation.
[B]. Those liquids which mix together in all proportion and form a single layer are called miscible liquids.
[C]. Pure water or distilled water is made from tap water by the process of distillation.
[D]. All the above
Q10

Consider the following statements and choose the correct one:

[A]. The separation of two immiscible liquids by separating funnel depends on the difference in their densities.
[B]. A mixture of petrol and water can also be separated by using a separating funnel.
[C]. A mixture of mercury, water and benzene can be separated by separating funnel.
[D]. All the above.

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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Last Edited: January 27, 2022