Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> How would you confirm that a colourless liquid given to you is pure water?

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> We can confirm if a colourless liquid is pure water by setting it to a boil. If it boils at 100°C it is said to be pure. But if there is a decrease or increase in the boiling point, we infer that water has added impurities hence not pure.

The boiling point and freezing point of the given liquid come out to be 100 °C or 373 K and 0 °C or 273 K respectively under one atmospheric pressure.