Question

How would you confirm that a colourless liquid given to you is pure water

Answer 1

By boiling the water we can check whether it is pure or not. If the water boils at 100 degree Celsius then it is pure but if its boiling point increases or decreases then the water must have some impurities and thus we can say that it is not pure.

Answer 2

I will take blue vitriol solution and of it turns blue or is water