Question

what is sublimations? and its use in our life.

Answer 1

The changing of a solid directly into vapours on heating,and of vapours into solid on cooling,is known as sublimation.Sublimation can be represented as:
                                                Heating
                                       Solid  ------------->Vapour (or Gas)
                                                <------------
                                                   Cooling

Example:-1-Dry Ice........2-Printers