Physics
When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is due to the phenomenon of :

Diffusion
Sublimation
Evaporation
Vaporisation

ANSWER DOWNLOAD EXAMIANS APP

Physics
Radiocarbon is produced in the atmosphere as a result of

Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
Action of ultraviolet light from the sun on atmospheric oxygen.
Lightning discharge in atmosphere.
Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.

ANSWER DOWNLOAD EXAMIANS APP