Properties of Colloids, Class 12 Chemistry NCERT Solutions

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. When colloids are subjected to an electrical field particles move towards an electrode and precipitate. Name the process.

Peptization

Electrophoresis

Brownian movement

Tyndal effect

Your comments:

Question 1 of 20

2. Which property is represented by the following figure;

electrophoresis

tyndal effect

Brownian movement

peptization

Your comments:

Question 2 of 20

3. Which law is represented by the following expression?
For a positive colloid the order of precipitation is : Phosphate ion>sulphate ion >chloride ion.

Brownian

Electrical movement

Hardy Schulze

Tyndal

Your comments:

Question 3 of 20

4. Which substance is added to water containing suspended impurities to coagulate the suspended impurities and make water fit for drinking purposes.

Milk of magnesia

KCl

NaCl

Alum

Your comments:

Question 4 of 20

5. The simplest way to check whether a system is a colloid is by using:

Brownian movement

Tyndall effect

Electrodialysis

Finding out particle size

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Question 5 of 20

6. Which method cannot be used for the coagulation of the lyophobic sol?

By persistent dialysis

By boiling

Electroosmosis

By electrophoresis

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Question 6 of 20

7. Lyophilic colloids that shows the property of protecting lyophobic colloids are also called as:

Protective colloids

Non-Protective colloids

Both protective and non protective

Associated colloids

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Question 7 of 20

8. Which of the following forms a colloidal solution in water?

A

B

C

D

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Question 8 of 20

9. The factors which are responsible for the stability of lyophilic sols are:

Size of the colloidal particles

Charge of the colloidal particles

Charge and solvation of the colloidal particles

Solvation of the colloidal particles

Your comments:

Question 9 of 20

10. The Brownian motion is due to:

Impact of molecules of the dispersion medium on the colloidal particles

Convective currents

Temperature fluctuation within the liquid phase

Attraction and repulsion between charges on the colloidal particles

Your comments:

Question 10 of 20

11. Which property of colloids is applied in rubber plating & sewage disposal?

Peptization

Brownian movement

Tyndal effect

Electrophoresis

Your comments:

Question 11 of 20

12. In Tyndall effect the colloidally suspended particles:

trace out the path of strong beam of light

show electrophoresis

show Brownian movement

coagulate

Your comments:

Question 12 of 20

13. Ferric hydroxide is a negative sol, which of the following electrolyte will coagulate it most:

FeCl₃

CaCO₃

BaSO₄

NaCl

Your comments:

Question 13 of 20

14. What is aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte called?

Coagulation

Dialysis

Peptization

Emulsion

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Question 14 of 20

15. A fresh precipitate can be transformed into colloidal sol by:

Peptization

Coagulation

Diffusion

None of these

Your comments:

Question 15 of 20

16. Which statement describes coagulation value?

Maximum amount (in millimoles) of electrolyte required to cause complete coagulation in one kilo gram of colloidal solution

Minimum amount (in kg) of electrolyte required to cause complete coagulation in one litre colloidal solution

Maximum amount (in millimoles) of electrolyte required to cause complete coagulation in one litre colloidal solution

Minimum amount (in millimoles) of electrolyte required to cause complete coagulation in one litre colloidal solution

Your comments:

Question 16 of 20

17. Which electrolyte will precipitate a negatively charged colloids (As₂S₃ sol ) to a greater extend?

Na⁺

Ba²⁺

Fe²⁺

Fe³⁺

Your comments:

Question 17 of 20

18. The process in which colloid is placed inside a bag of semi permeable membrane like cellophane or parchment paper which permits ions and not colloids to pass through, is called as:

Peptization

Emulsion

Coagulation

Dialysis

Your comments:

Question 18 of 20

19. Which of the following will have the highest coagulating power for As₂S₃ colloids?

A

B

C

D

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Question 19 of 20

20. What is scattering of light by mist on head light of vehicles called?

Peptization

Electrophoresis

Brownian movement

Tyndal effect

Your comments:

Question 20 of 20

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