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When 20 g of naphthoic acid (C11H8O2) is...

When 20 g of naphthoic acid `(C_11H_8O_2)` is dissolved in 50 g of benzene , a freezing point depression of 2K is observed. The vant Hoff factor (i) is [`K_f="1.72 K kg mol"^(-1)` ]

A

`0.5`

B

`1.0`

C

`2.0`

D

`3.0`

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