1.

What do you mean by vapour pressure? What happens to the vapour pressure, when (i) volatile solute is dissolved in solution. (ii) non-volatile solute is dissolved in solution?

Answer»

Vapour Pressure:

Pressure exerted by vapours of a liquid on its child layer at equilibrium is called vapour pressure.

(i) When volatile solute is added to another liquid solution then the resultant vapour pressure may increase, decrease or may remain same depending on the strength of solute-solved interaction.

(ii) When non-volatile solute is dissolved in solution, net vapour pressure decreases.



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