give reason why common salt is sprinkled over laden roofs and path in mountainous sreas
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When impurities are present in any substance the melting point decreases.
So when salt is added to snow in the mountainous areas, it acts as an impurity and reduces the melting point of snow from 0℃ to below it.
Since the temp. around is below 0℃ the snow starts melting in that condition.
So when salt is added to snow in the mountainous areas, it acts as an impurity and reduces the melting point of snow from 0℃ to below it.
Since the temp. around is below 0℃ the snow starts melting in that condition.
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