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

Q. Question 6
How would you confirm that a colourless liquid given to you is pure water?

Q. How would you confirm that a colourless liquid given to you is pure water? $\left(A{S}_1\right)$

Q. <!--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?

Q. [Textbbok question HOT Q-1]
<!--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?