Question

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

NCERT Class IX
Sciences - Exemplar Problems

Chapter 2. Is Matter Around Us Pure

Answer 1

The boiling point of pure water is 100 degree Celsius.

Here Sample A is able to boil at the temperature of 100 degree Celsius while Sample B is boiling at the 102 degree Celsius.

This only means that Sample B is not a pure water and is mixed up with some other solvent.

Hence, it won’t freeze at 0 degree Celsius.