Question : Which among the following is liquid non-metal?

Option 1: Mercury

Option 2: Bromine

Option 3: Water

Option 4: Alcohol

Question : An emulsion is a colloid of a

Option 1: Gas in a liquid

Option 2: liquid in a liquid

Option 3:  liquid in a gas

Option 4: Gas in a solid

Question : What is dry ice?

Option 1: Solid Carbon dioxide

Option 2: Solid Nitrogen dioxide

Option 3: Solid Sulphur dioxide

Option 4: Solid water

Question : The number of solid spheres, each of diameter 6 cm, that could be moulded to form a solid metal cylinder of height 90 cm and diameter 4 cm is:

Option 1: 10

Option 2: 14

Option 3: 16

Option 4: 13

Question : A colloidal system in which a liquid is dispersed in a liquid is called

Option 1: gel

Option 2: emulsion

Option 3: sol

Option 4: precipitate