Question

17) What is sublimation? Name two substance which undergo sublimation.

Answer 1

Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase. 

Maybe it's helps you dear

Answer 2

sublimation is the process by which a substance directly changes it's phase from solid to gas without going in liquid state....
examples- Carbon dioxide (dry ice) and iodine... hope this helps... plz mark this as brainliest....