JEE Main Chemistry question

Vapour pressure increases with increase in **[OJEE 2008]**

(A)Concentration of solution containing non-volatile solute
(B)Temperature up to boiling pointCorrect
(C)Temperature up to triple point
(D)Altitude of the concerned place of boiling

Answer: (B)

Solution

As a liquid is heated, more molecules gain enough kinetic energy to escape into the vapour phase, so vapour pressure rises continuously with temperature up to the point where it equals the external (atmospheric) pressure, i.e. the boiling point. Dissolving a non-volatile solute lowers vapour

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Question ID VK-133914