1.

The mole fraction of solute in some solution is `1//n`. If `50%` of the solute molecules dissociates into two parts and remaining `50%` get dimerized now mole fractions of solvent become `4/5`. Find value of `n`.

Answer» Correct Answer - 6
`i=1.25`
Original mole fraction `=1/n=1/(1+(n-1))=1.25/(1.25+(n-1))=1/5impliesn=6`


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