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When 20 g of naphthoic acid (C(11)H(8)O(...

When `20 g` of naphthoic acid `(C_(11)H_(8)O_(2))` is dissolved in `50 g` of benzene `(K_(f)=1.72 K kg mol^(-1))`, a freezing point depression of `2 K` is observed. The Van't Hoff factor (i) is

A

0.2

B

1

C

2

D

3

Text Solution

Verified by Experts

Molality (m) of solution `=(20/172)/50xx1000=2.33m`
`DeltaT_(f)=iK_(f).m`
`i=2/(1.72xx2.33)~~0.5`
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