In cold countries, ethylene glycol is used in car radiators for both winter as well as summer seasons. Which of the following principle is involved here?

Depression of freezing point

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Elevation of boiling point

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Decrease in rate of evaporation

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All the above

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Solution

The correct option is D All the above
Ethylene glycol is the material which is used to cool the engine of the car. In cold countries, the temperature remain all most constant in both summer and winters means atmosphere remain cool. Hence, ethylene glycol which have hydroxyl group shows properties like elevation of boiling point, decrease in rate of evaporation etc.

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