1.

The lowering in vapour pressure when a solute is added

Answer»

Will depend uponthe nature of the SOLUTE
Will be the same irrespective of the solvent TAKEN
Will be DIFFERENT when different solvent are taken
Will depend on the form IDEAL solution

Solution :Explanation : (a) `Delta P=oP_(A)^(@)x_(B)`
(a) Hence, `Delta F` depends upon i which is dependent on nature of solute (Hence, choice (a) is correct).
(c ) `Delta F` depends upon `P_(A)^(@)`. If `P_(A)^(@)` changes then `Delta F` changes. Hence when different solvents are taken `Delta F` value is different. Choice (c ) is also correct.
(d) Is also correct. `Delta F` changes with mole fraction of solute. `Delta F` also changes with TEMPERATURE.
(b) Is wrong because `Delta F` depends upon solvent.


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