Question

When 20g of naphthoic acid (c11h8o2) is dissolved in 50g benzene (kf = 1.72 kkgmol-1 ) a freezing point depression of 2k is observed. The vant hoff factor is?​

Answer 1

When 20g of naphthoic acid (C11,H8, O2) is dissolved in 50g of benzene (kf = 1.72K kg mol-1), a freezing point depression

Answer 2

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Correct option is

Answer::-0.5

Molaloity =

172×50/20×1000 =2.3

∴ Depression in freezing point =2=2.32×1.72×i

∴i=0.5