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

The reason for chlorinating water is _____.

1. 1. to kill germs
   2. to add minerals
   3. to add taste
   4. to propagate germs

Which among the following is in liquid state at normal room temperature?

1. 1. Phosphorus
   2. Sodium
   3. Mercury
   4. None of the above