The reaction taking place at anode and cathode are respectively _____.

1. 1. Oxidation, Reduction
   2. Reduction, Oxidation
   3. Reduction, Hydrolysis
   4. Oxidation, Hydrolysis

Gases can be compressed to a greater extent because _____.

1. 1. there is a large space between the molecules
   2. there are lighter than liquids
   3. there is no gap between molecules
   4. molecules are elastic

Milk is a colloid in which _____.

1. 1. some sugar is dispersed in water
   2. a gas is dispersed in a liquid
   3. a solid is dispersed in a liquid
   4. a liquid is dispersed in a liquid

Smoke is an example of _____.

1. 1. Gas dispersed in liquid
   2. Solid dispersed in gas
   3. Gas dispersed in solid
   4. Solid dispersed in solid

Digestion of fats in the intestines is aided by _____.

1. 1. Hydrolysis
   2. Oxidation
   3. Emulsification
   4. De-emulsification

Detergent action of soaps and synthetic detergents is due to their _____.

1. 1. Emulsifying properties
   2. Ionisation
   3. Interfacial area
   4. High molecular weight

Heavy water is known as heavy because _____.

1. 1. it is denser than ordinary water
   2. it has heavy or bad tastes
   3. it is an oxide of deuterium
   4. it has a heavier isotope of hydrogen

Many people died in London in 1952 as a result of air pollution caused by _____.

1. 1. Smog
   2. Mist
   3. Fog
   4. Smoke

Sea water is converted into fresh water by using the phenomenon of _____.

1. 1. Plasmolysis
   2. Reverse osmosis
   3. Sedimentation
   4. Diffusion

Carbonated drinks are examples of _____.

1. 1. Gas in water
   2. Gas in gas
   3. Gas in solid
   4. Solid in liquid