A mixture of sulphur and carbon disulphide is:

Sulphur dissolves completely in carbon disulphide. So, it forms a homogeneous solution. As the particles of solute are too small to scatter light, they will not cause tyndall effect.

Which of the following statement is or are correct?

Here, all these statements are correct. Hence your answer will be option [D].

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

Milk is considered to be an impure substance as it is an emulsion. Emulsion is a colloid in which minute droplets of one liquid are dispersed in another liquid, which is not miscible with it.

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

The substance which is dissolved in a liquid to make a solution is called solute and the liquid in which solute is dissolved is known as solvent. For example, salt solution is made by dissolving salt in water, so in salt solution “salt” is the solute and water is the “solvent”.

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:

The composition of water is fixed. It contains hydrogen and oxygen combined together in a fixed proportion of 1 : 8 by mass. It has a definite formula H2O.

Which of the following statement is or are incorrect?

Here, are all the statements are correct. Hence, your answer will be option [D].

Which of the following statement is or are incorrect?

The separation of a dissolved solids from a liquid can be done by a number of other methods such as evaporation, crystallization, distillation and chromatography etc.

Class 9 Science Chapter 2 MCQ Is Matter Around us pure?

Updated by Tiwari Academy
on June 10, 2023, 8:29 AM

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 2024-25. 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: 9	Science
Chapter: 2	Is Matter Around us pure?
Contents:	MCQ Online Test with Answers

Class 9 Science Chapter 2 MCQ with Answers

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.

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.

View Answer

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

View Answer

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

View Answer

Which of the following are homogeneous in nature?

[A]. Ice, soil

[B]. Wood, air

[C]. Ice, air

[D]. Soil, air

View Answer

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.

View Answer

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.

View Answer

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

[A]. The maximum amount of a solute which can be dissolved in hundred grams of a solvent at a specified temperature is known as the solubility of that solute in that solvent.

[B]. The solubility of solids in liquids usually increases on increasing the temperature and decreases on decreasing the temperature.

[C]. The solubility of gases in liquids increases on increasing the pressure and decreases on decreasing pressure.

[D]. All the above

View Answer

Rahul appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

[A]. Those changes in which no new substances are formed, are called physical changes. [B] The physical changes are temporary changes which can be reversed easily to form the original substance. [C] Those changes in which new substance are formed are called chemical changes. [D] The chemical changes are permanent changes which are usually reversible.

View Answer

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.

View Answer

Q10

Consider the following statements and choose the correct one(s):

[A]. The elements which shows some properties of metals and some other properties of nonmetals are called metalloids.

[B]. The mixture is a substance which consists of two or more elements or compounds not chemically combined together.

[C]. All the suspension and colloids are considered as heterogeneous mixtures.

[D]. All the above.

View Answer

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Last Edited: June 10, 2023