Question

What happens when \(\text{CuSO}_4\) is dissolved in water?
Identify correct statements from the following

• A. Anion of the salt react with water.
• B. Its solution will turn red litmus into blue.
• C. The pH of the solution will be less than \(7\).
• D. The \(\text{CuSO}_4\) will not undergo hydrolysis reaction.

Hint:

CuSO4 is a salt of a weak base and a strong acid, so the solution is acidic.

Answer 1

The Correct Option is C

Step 1: Method of elimination
If the solution were basic (B) would hold, but Cu$^{2+}$ is an acid-forming cation, so (B) fails. (D) says no hydrolysis, which is false for a transition metal cation. (A) puts the reaction on the wrong ion.

Step 2: Remaining
(C) is the only true statement: the pH is below $7$.

Final Answer:
Option (C). \[ \boxed{\text{(C)}} \]