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Separation by Evaporation

The physical ...

Question

The physical process of converting a liquid into its gaseous state is called ___________________.

A

evaporation

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B

condensation

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C

sublimation

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D

melting

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Solution

The correct option is A
evaporation

The physical process of converting a liquid to its gas is called evaporation or vaporization.

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

Converting a gas or vapour to a liquid by cooling is called condensation.

Melting is defined as the physical process that converts a solid to a liquid.

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State whether true or false.

The process in which a solid directly changes into gaseous state is called evaporation.

Q. Assertion :Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase. Reason: Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance

Q. State whether the following statements are true or false. Rewrite the false ones correctly.
(a) All irreversible changes are chemical changes.
(b) A liquid can sublime.
(c) The evaporation of water take place only at 100°C. when it is boiling.
(d) The melting of ice is a physical change.
(e) The souring of milk is a periodic change.
(f) The flowering of trees is a periodic change.
(g) Solidification and condensation are the same.
(h) The breaking of glass tumbler is a chemical change because it is irreversible.
(i) Boiling, evaporation and condensation are physical changes.

The process by which a solid directly converts into its gaseous state is called

Q. You find the inside of the car window getting foggy in winters. This is because of
(a) condensation.
(b) sublimation.
(c) melting.
(d) evaporation.

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