1.

The molar mass of the solute sodium hydrdoxide obtained from the measurement of the osmotic pressure of its aqueous solution at 27^(@)C is 25 g mol^(-1). Therefore its ionization percentage in this solution is

Answer»

75
60
80
70

Solution :In case of ionisation of BINARY electrolyte
ABNORMAL MOLECULAR mass `=(M_("normal"))/(1+ALPHA)`
Abnormal molecular mass = 40
So, `25=(40)/(1+alpha)rArr alpha =0.6`
Ionisation percemntage `= 0.6xx100=60%`.


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