Question

Which of the following will determine whether the given colourless liquid is water or not.

• A. Melting
• B. Tasting
• C. Phosphthalein
• D. Adding a pinch of anhydrous $CuSO_{4}$

Answer 1

Answer: (D)

Adding a pinch of anhydrous $CuSO_{4}$

Answer 2

Colourless anhydrous $CuSO_{4}$ becomes blue on

reaction with water