You are given two samples of water labelled as ‘A’ and ‘B’. Sample ‘A’ boils at $100℃$ and sample ‘B’ boils at $102℃$. Which of the following sample of water will not freeze at $0℃$?

Sample A:
The boiling point of water is $100℃$ at 1 atm pressure, and the freezing point is $0℃$ at 1 atm pressure and we know that only pure substances have such melting and boiling point.
Sample B:
When water has some impurities then its boiling point rises and melting point falls. Now sample B here is not pure water since its boiling point is more than $100\mathit{℃ }$and hence its melting point will be lower than $0℃$ . This is the reason why sample B will not freeze at $0℃$.

Hence, sample B will not freeze at 0℃.