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How does sprinking of salt help in clear...

How does sprinking of salt help in clearing the snow covered roads in hilly areas? Explain the phenomenon involved in the process.

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When salt is spread over snow covered roads, it lowers the freezing point of water to such an extent that water does not freeze to form ice. As a result, the snow starts melting from the surface and therefore, it helps in clearing the roads. Hence, common salt acts as de-icing agent.
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