Question

how con we know that an colourless liquid is an pure substance​

Answer 1

Answer:

Take a sample of colourless liquid and put on stove if it starts boiling exactly at 100 ºC then it is pure water. Any other colourless liquid such as vinegar always have different boiling point. Also observe carefully that after some time whole liquid will convert into vapour without leaving any residue. 7.

Answer 2

Answer:

Evaporate the colourless liquid on a low flame. If no residue is left and boiling exactly at 100 ºC then it is pure water otherwise not.

Explanation:

hope that helps u