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A volatile solution AB is dissolved in ...

A volatile solution AB is dissolved in water , in which mole fraction of water is `5//6` . If `50%` of molecules of AB get dissociated into A and B and remaning `50%` get dimerised into `(AB)_(2)`. Then relative lowering of vapour pressure will

A

Increase by `20%`

B

Increase by `25%`

C

Remain same because mass of solute is unchanged

D

Remain same because no. of solute particles will not change.

Text Solution

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The correct Answer is:
B
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