Laughing gas is Nitrous Oxide (N₂O).

Correct Option: B

Laughing gas is Nitrous Oxide (N₂O).

Landfills, Incineration, Pyrolysis and Gasification are methods of disposing of solid waste which cannot be reused or recycled.

Correct Option: D

Landfills, Incineration, Pyrolysis and Gasification are methods of disposing of solid waste which cannot be reused or recycled.

Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.

Correct Option: C

Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.

In silvery paints, the main constituent is aluminium powder.

Correct Option: A

In silvery paints, the main constituent is aluminium powder.

Bromine, a non-metal of halogen group, is found in liquid state. Mercury is a metal. Water and alcohol are compounds.

Correct Option: B

Bromine, a non-metal of halogen group, is found in liquid state. Mercury is a metal. Water and alcohol are compounds.