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A non-volative solute X completely dimer...

A non-volative solute X completely dimerises in water, if the temperature is below `-3.72^(@)C` and the solute completely dissociates as `X rarr Y + Z`, if the temperature is above `100.26^(@)C`. In between these temperature, (including both temperature) X is neither dissociated nor associted. One mole of X is dissolved in `1` kg water.
Given : `K_(b)` of water `= 0.52 K. kg "mol"^(-1)`
`K_(f)` of water `= 1.86 K kg "mol"^(-1)`
Which of the following statement(s) is/are true regarding the solution?

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