Question

define sublimation.write three sublime substances

Answer 1

When a solid changes directly to gaseous state without passing through the intermediate liquid state is known as sublimation . Three sublime substances are - camphor , ammonium chloride n naptheline.

Answer 2

here you go:-

when a substance directly undergoes gaseous to solid state without undergoing liquid state is known as sublimation.

e.g.
nepthalene balls

camphor

ammonium chloride

hope it helps you.......