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# Calculate the depression in freezing point of water when 20.0 g of $CH_3CH_2CHCICOOH$ is added to 500 g of water. [Given, $K_a = 1.4 × 10^{−3}, K_f = 1.86 K kg mol^{−1}$]

0.6465-0.65K
Hence (A) is the correct answer.