Give reasons for the following :
(a) Ice though being a solid floats on water.
(b) A gas fills completely the vessel in which it is kept ?
(c) Rate of evaporation of an aqueous solution decreases with increase in humidity
Answers
Answer:
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Yes
Explanation:
Ice has less weight than water
Gases are shapeless
Humidity cause the air to beilled with vapour and cool
l(a) Density of ice is less than that of water. This is on account of the reason that the structure of ice is porous. Therefore, for a given mass , the volume of ice is more than that of water.
(b) This happens because the particles of gas have the high kinetic energy due to which they keep moving and hence exert pressure on the walls of the vessel in which it is kept and hence they readily fill the vessel completely, attaining the same volume as that of the vessel.
(c) Humidity is the amount of water vapour present in air. So, the increase in humidity means that air has high water content due to which it becomes difficult for air to take in more water molecues formed as a result of evaporation. Hence, the rate of evaporation of an aqueous solution decreases with the increase of humidity.
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