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

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 statement is or are correct?

[A]. Metals can be beaten into thin sheets with the hammer without breaking.
[B]. Metals can be drawn or stretched into thin wires.
[C]. Metals allow heat and electricity to pass through them easily.
[D]. All of the above
Q4

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




Q5

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
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

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

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

[A]. Argon is filled in electric bulbs.
[B]. The various gases of air are separated from one another by the fractional distillation of liquid air.
[C]. Fractional distillation separate the various liquids according to their boiling points, as the more volatile liquid distils over first and the less volatile liquid distils over later.
[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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