A 0.5 molal solution of ethylene glycol ...

A 0.5 molal solution of ethylene glycol in water is used as coolant in a car. If the freezing point constant of water is `1.86^(@)C` per molal, the mixture shall freeze at:

`0.93^(@)C`

`-0.93^(@)C`

`1.86^(@)C`

`-1.86^(@)C`

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