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Byju's Answer

Standard IX

Chemistry

Flow Chart for Inter-Conversion of the Three States of Matter

In which of t...

Question

In which of the following processes do the change in the states of matter involve the absorption of energy if the pressure remains same?
i. Conversion of water into vapor
ii.Conversion of ice into liquid
iii. Conversion of solid $C O_{2}$ into gaseous $C O_{2}$
iv. Conversion of water vapor into liquid water

(i) and (ii) only

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(ii) and (iii) only

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(i), (ii), (iv) only

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(i), (ii), and (iii) only

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Solution

The correct option is D (i), (ii), and (iii) only
$∙$ Conversion of water into vapor is called vaporization.Vaporization occurs when heat is absorbed by the matter.
$∙$ Conversion of ice into liquid water is called fusion. Fusion occurs when heat is absorbed by the matter.
$∙$ Conversion of solid $C O_{2}$ into gaseous $C O_{2}$ is called sublimation. Sublimation occurs when heat is absorbed by the matter.
$∙$ Conversion of vapor into liquid water is called condensation. Condensation is the reverse of vaporization i.e. change in the physical state of a substance from a gaseous state to a liquid. Vaporization occurs when heat is absorbed by the matter and condensation occurs when heat is released by the matter.

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Select the correct alternative:

(a) The inter-molecular force is maximum in :

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(b) The inter-molecular space is maximum in :

(i) liquids (ii) solids

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(iii) solids (iv) none of the above

(e) The temperature at which a liquid gets converted into its vapour state is called its :

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(g) Evaporation takes place from the :

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(iv) bottom of the liquid

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(i) the surface of the liquid

(ii) throughout the liquid

(iii) mid-portion of liquid

(iv) none of the above

Q. In which of the following processes do the change in the states of matter involve the release of energy?
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In which of the following processes do the change in the states of matter involve the absorption of energy if the pressure remains same? i. Conversion of water into vapor ii.Conversion of ice into liquid iii. Conversion of solid CO2 into gaseous CO2 iv. Conversion of water vapor into liquid water