You are given two samples of water labelled as A and B. sample A boils at 100 degree Celsius and sample B boils at 102 degree Celsius. Which sample of water will freeze at zero degree Celsius. Comment.
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It is because sample 'B' boils at 102°C while the boiling point of pure water is 100°C. It means this sample contains impurities. Only pure substance has sharp melting point.
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