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UPSC CAPF AC Paper - I
IMPORTANT
Earn 100

Artificial rain can be made by throwing electrified sand from aeroplanes. The chemical used for cloud seeding for artificial rains is:

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Important Questions on Chemistry

EASY
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 81
Cloud is a colloidal dispersion of _____.
EASY
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 82
Milk is a colloidal system. It is stabilised by casein, a lyophilic colloid. In milk:
EASY
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 83
A substance which readily forms a colloidal solution in contact with water is called _____.
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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 84
Gelatin is a lyophilic colloid. It is mostly used in making ice-creams in order to:
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 85

Match the following Column.

Column I Column II
A. Smoke 1. Dispersion of gas in liquid
B. Gel 2. Dispersion of solid in solid
C. Emulsion & liquid 3. Dispersion of liquid in liquid
D. Foam 4. Dispersion of liquid in solid
  5. Dispersion of solid in gas

Codes:

EASY
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 86

Statement I: To increase the solubility of CO2 in soft drinks and soda water, the bottle is sealed under high pressure.

Statement II: Solubility of a gas in liquid is directly proportional to the pressure of the gas.

HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 87

Consider the following statements:

I. Gases are soluble in liquids as well as in solids.

II. Gases which form ion in the solvent, are soluble in that solvent.

III. Gases which can be liquefied easily are more soluble in water than the other gases which are not liquefied easily.

Which of the above statements is/are correct?

EASY
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 88

Statement I: When light passes through a colloidal solution its path becomes visible.

Statement II: Light is scattered by colloidal particles.