The fraction of phenol dimerised in benzene if 20 g of phenol in 1 kg benzene exhibts a freezing point depression of 0.69 K.`( K_(f) "benzene "=5.12 (K-kg)/(mol))` ltbgt (MW phenol =94)
A
0.74
B
0.37
C
0.46
D
0.64
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A
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