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Question

The compound (s) used as an anti-freeze in radiators of automobiles is/are :

A
methyl alcohol
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B
ethyl alcohol
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C
ethyl alcohol + water
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D
methyl alcohol + water
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Solution

The correct option is C ethyl alcohol + water
An anti freeze is an additive which lowers the freezing point of a water based liquid. It is used to achieve freezing point depression for cold environments and also achieve boiling point elevation to allow higher coolant temperature. It uses colligative properties of substances like ethyl alcohol and water.

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