1.0 g of a monobasic acid HA in 100 g water lowers the freezing point by 0.155 K. IF 0.75 g, of same acid requires 25 mL of N/5 NaOH solution for complete neutralisation then %, degree of ionization of acid is (`K_(f) of H_(2)O = 1.86 K kg "mol"^(-1)`):
A
0.2
B
0.25
C
0.4
D
0.5
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The correct Answer is:
b
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