Assertion : If a liquid solute more volatile | vedclass

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(C) According to Raoult's Law,the total vapour pressure of a solution containing two volatile components is given by $p_s = p_1 + p_2 = x_1 p_1^o + x_

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If the Assertion is correct but Reason is incorrect.

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(C) According to Raoult's Law,the total vapour pressure of a solution containing two volatile components is given by $p_s = p_1 + p_2 = x_1 p_1^o + x_2 p_2^o$.If the solute (component $2$) is more volatile than the solvent (component $1$),then $p_2^o > p_1^o$.In this case,the total vapour pressure $p_s$ can be greater than the pure solvent vapour pressure $p_1^o$ depending on the mole fraction.However,the Reason is incorrect because both components contribute to the total vapour pressure,and both form vapours,with the vapour phase being richer in the more volatile component.

Assertion : If a liquid solute more volatile than the solvent is added to the solvent,the vapour pressure of the solution may increase i.e.,$p_s > p^o$.
Reason : In the presence of a more volatile liquid solute,only the solute will form the vapours and solvent will not.

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Assertion : If a liquid solute more volatile than the solvent is added to the solvent,the vapour pressure of the solution may increase i.e.,$p_s > p^o$.Reason : In the presence of a more volatile liquid solute,only the solute will form the vapours and solvent will not.