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  • Choose the correct statement of the following. (a) conversion of solid into vapours without passing through the liquid state is called sublimation. (b) conversion of vapours into solid without passing through the liquid state is called vapourisation

Choose the correct statement of the following:

(a) conversion of solids into vapours without passing through the liquid state is called sublimation.
(b) conversion of vapours into solids without passing through the liquid state is called vaporisation.
(c) conversion of vapours into solids without passing through the liquid state is called freezing.
(d) conversion of solids into liquid is called sublimation.

Answers (1)

Ans. A

Sol.

When the temperature of the gas decreases, at a particular temperature, the gas gets liquefied; this phenomenon is called condensation. If we further decrease the temperature of liquid, the liquid get converted into solids; this phenomenon is called freezing.

On the other hand, if we increase the temperature of a solid, at a particular temperature, it get liquefied; this phenomenon is called melting. If we further increase the temperature of the liquid, it get converted into vapour; this phenomenon is called boiling.

But some solids shows exceptional behaviour when increasing their temperature; they can directly converted into gases without acquiring intermediate liquid state. This phenomenon is called sublimation.

Hence, the correct answer is option A.

Posted by

Gurleen Kaur

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