question_answer 42)

  You are given two samples of water labelled as 'A' and 'B'. Sample 'K boils at 100°C and sample 'Q' boils at 102°C.Which sample of water will not freeze at 0°C? Comment.

Answer:

  Sample 'B' will not freeze at  as, it is impure water. 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.