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Mixtures

Description: All about Mixtures
Number of Questions: 15
Created by:
Tags: Mixture Matter Types of Mixtures, Homogeneous Mixtures, Heterogeneous Mixture Mixture , Characteristics of Mixture Suspension, Properties of a Suspension Solute and Solvent Properties of a True Solution & Types Separation of a Mixture of Two Immiscible Liquids? Separation of Dyes Present in Ink Separation of a Mixture of Salt and Ammonium Chloride Disitillation, Fractional Distillation Fractional Distillation of Air
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Which of the following statements is true regarding mixtures?

  1. Mixtures are of three types.

  2. The components of a mixture do not retain their properties.

  3. Components of a mixture are present in any proportion.

  4. Mixtures are pure substances.

  5. Mixture is made up of one type of element.

Show answer
Correct Option: C
Explanation:

Yes, it is the correct answer. Components of a mixture are present in any proportion.

Which statement is/are false regarding alloys to be considered as a solution?

  1. Components of an alloy cannot be separated by physical methods.

  2. Their boundaries are not distinct.

  3. They show Tyndall effect.

  4. Both 1 and 3

  5. Both 2 and 3

Show answer
Correct Option: C
Explanation:

Yes, it is the correct answer as alloys cannot show Tyndall effect. This statement is false.

In a solution, solvent can be solid, liquid or gas, and solute can be ________. (a) solid (b) liquid (c) gas

Which of the above given options is/are correct?

  1. Only a

  2. Only b

  3. Only c

  4. Only b and c

  5. All of these

Show answer
Correct Option: E
Explanation:

Yes, all are correct. Solute can be solid, liquid or gas like a solvent.

The process of distillation is used to separate two miscible liquids. The technique of distillation is based on the _________ of components of mixture.

  1. difference in freezing points

  2. fractional difference in their boiling points

  3. travel speed of components

  4. difference in the boiling points

  5. difference in weights

Show answer
Correct Option: D
Explanation:

Yes, the liquid which boils at lower temperature is vapourised at lower temperature. The technique of distillation is based on the difference in boiling points of components of mixture.

Match the following correctly:

     
1 Alloys a Heterogeneous mixture
2 Elements b Pure substance
3 Tyndall effect c Solution

  1. 1 - c, 2 - b, 3 - a

  2. 1 - a, 2 - b, 3 - c

  3. 1 - c, 2 - a, 3 - b

  4. 1 - b, 2 - a, 3 - c

  5. 1 - a, 2 - c, 3 - b

Show answer
Correct Option: A
Explanation:

Yes, it is the correct match. Alloys are examples of solution. Elements are pure substances. Tyndall effect is seen in a heterogeneous mixture.

In which of the following applications is separation of components not done, on the basis of fractional differences in the boiling points of components?

  1. In petroleum refineries, petrochemical and chemical plants

  2. In separation of fat from milk

  3. In oil refineries to separate crude oil into useful substances

  4. In the separation of ethanol and water

  5. In the separation of oxygen, liquid nitrogen and argon from air

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer as fat from milk is separated by centrifugation method.

To separate different gases from air, which method is used?

  1. Centrifugation method

  2. Evaporation

  3. Sublimation

  4. Fractional distillation

  5. Chromatography

Show answer
Correct Option: D
Explanation:

Yes, it is the correct answer. Separation of oxygen, liquid nitrogen and argon from air is done by fractional distillation.

Which of the following statements is false regarding the properties of a suspension?

  1. Suspensions are a heterogeneous mixture of two or more substances.

  2. Particles of solute do not dissolve in solvent.

  3. The size of particles of suspension is very small.

  4. Suspension shows Tyndall effect.

  5. Milk of magnesia is a suspension.

Show answer
Correct Option: C
Explanation:

Yes, it is the correct answer as this statement is false. The size of particles of suspension is large enough to be visible from naked eye.

Match the following gases with their uses.

     
1 Nitrogen a in bulbs
2 Oxygen b in fertilizers
3 Argon c in hospitals

  1. 1 - c, 2 - b, 3 - a

  2. 1 - a, 2 - c, 3 - b

  3. 1 - b, 2 - c, 3 - a

  4. 1 - a, 2 - b, 3 - c

  5. 1 - c, 2 - a, 3 - b

Show answer
Correct Option: C
Explanation:

Yes, it is the correct match. Nitrogen is used in fertilizers, oxygen is used in hospitals and argon is used in bulbs.

Which of the following pairs of solvent and solute is incorrect?

  1. Water - Solvent in salt solution, Salt - Solute in salt solution

  2. Iodine - Solvent in tincture of iodine, Alcohol - Solute in tincture of iodine

  3. Water - Solvent in lemonade, Lemon - Solute in lemonade

  4. Carbon - Solute in steel, Iron - Solvent in steel

  5. Nitrogen - Solvent in air, Other gases - Solute in air

Show answer
Correct Option: B
Explanation:

No, here solvent is alcohol and iodine is the solute. Hence, it is the correct answer. 

By the method of centrifugation, which type of components are separated in a mixture of two immiscible liquids?

  1. Components which are chemically different

  2. Components which are heavier and lighter

  3. Components which are of different colours

  4. Components that have a fractional difference in their boiling points

  5. None of these

Show answer
Correct Option: B
Explanation:

In the method of centrifugation, the centripetal and centrifugal forces are used to separate lighter and heavier components of the mixture of two immiscible liquids.

Which of the following statements is false regarding the properties of a homogeneous mixture?

  1. The particles of a homogeneous mixture are less than one nanometre in size.

  2. The boundaries of particles cannot be differentiated.

  3. A homogeneous mixture shows Tyndall effect.

  4. When a ray of light is passed through a homogeneous mixture, the path of light is not visible.

  5. A mixture of salt and water is a homogeneous mixture.

Show answer
Correct Option: C
Explanation:

Yes, it is the correct answer as this statement is false. A homogeneous mixture does not show Tyndall effect.

Which of the following belong to the category of heterogeneous impure substances?

  1. Compounds
  2. Suspensions
  3. Solutions
  4. Colloids

  1. Only 1

  2. Only 4

  3. Both 2 and 4

  4. 2, 3 and 4

  5. Both 1 and 3

Show answer
Correct Option: C
Explanation:

Yes, both are heterogeneous impure substances. Hence, it is the correct answer.

Which of the following substances is/are not sublimable?

  1. Dry ice

  2. Carbon

  3. Naphthalene balls

  4. Ammonium chloride

  5. None of these

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer as carbon is not a sublimable substance. It does not convert into gas without changing into liquid.

Chromatography is used in

(a) separation of colours from dyes (b) pathological test of blood and urine (c) separation of drugs from blood for pathological tests

  1. Only a

  2. Only b

  3. Only c

  4. Only a and c

  5. Only a and b

Show answer
Correct Option: D
Explanation:

Yes, it is correct. Both a and c are the applications in which chromatography is used.

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