Ethylene glycol is used as an antifreeze in a cold cliamate Mass of ethylene glycol which should be added to `4` kg for water to prevent it from freezing at `-6^(@)C` will be (`K_(f)` for water =`1.86 K kg mol^(-1)` and molar mass of ethylene glycol =`62 g mol^(-1)`)

Options

A. 304.6 g
B. 804.32 g
C. 204.3 g
D. 400.00 g

Answer

B

Explanation

`DeltaT=K_(f)xx(w_(B)xx1000)/(m_(B)xxw_(A))`
`6=1.86xx(w_(B)xx1000)/(62xx4000)`
`w_(B)=800g`]