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A solution containing 1.8 g of a compou...

A solution containing 1.8 g of a compound (empirical formula `CH_(2)O`) in 40 g of water is observed to freeze at `-0.465^(@)`C. The molecules formulea of the compound is (`K_(f)` of water =1.86kg K`mol^(-1)`):

A

`C_2H_4O_2`

B

`C_3H_6`

C

`C_4H_8O_4`

D

`C_6H_12O_6`

Text Solution

Verified by Experts

The correct Answer is:
D
`0.465 = 1.86 xx[(1.8//x)/40 xx 10^3]`
`x = 108 g//mol :. C_6H_12O_6`
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