Class 9 Science Chapter 2 MCQ

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 2020-2021

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

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

[A]. The property which allows the materials to be hammered or beaten into thin sheets without breaking is called malleability.
[B]. The property which allows the metals to be drawn or stretched into thin wires without breaking is called ductility.
[C]. the property due to which non-metals break into pieces on hammering is called brittleness.
[D]. All of the above




Q3

Tincture of iodine has antiseptic properties. This solution is made by dissolving :

[A]. Iodine in potassium iodide
[B]. Iodine in acetone
[C]. Iodine in water
[D]. Iodine in alcohol
Q4

Which of the following are homogeneous in nature?

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




Q5

Rusting of an article made up of iron is called:

[A]. Corrosion and it is a physical as well as 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.
Q6

Consider the following statements and choose the correct one:

[A]. Graphite is the allotropic form of carbon and it is a good conductor of electricity.
[B]. Bromine is a non-metal which exist as a liquid at room temperature.
[C]. Phosphorus is a non-metal other than carbon which shows allotropy.
[D]. All the above



Q7

Priya is writing some statements, choose the incorrect statement and help him:

[A]. A soap solution cannot scatter a beam of light passing through it.
[B]. An emulsion is a colloid in which minute droplets of one liquid are dispersed in another liquid which is not miscible with it.
[C]. The gel is a semi-solid colloid in which there is a continuous network of solid particles dispersed in a liquid.
[D]. An aerosol is a colloid in which a solid or liquid is dispersed in a gas as fog, mist etc.
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

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.
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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