The method which cannot be used for the preparation of copper salts is:
Show Hint
- 1 (Action of acid on bases)
- 2 (Action of acid on carbonates)
- 3 (Action of acid on metals)
- 4 (Action of acid on sulphites)
The Correct Option is C
Solution and Explanation
Step 1: Understanding Salt Preparation:
Soluble salts can be made by reacting an acid with a metal, base, or carbonate. However, the "Metal + Acid" method only works for metals more reactive than hydrogen.
Step 2: Checking Copper's Reactivity:
As established in question (vii), Copper is below hydrogen in the reactivity series. This means it cannot displace hydrogen from dilute acids like (HCl) or (H_2SO_4).
Step 3: Evaluating Alternatives:
Copper salts can be prepared by reacting Copper oxide (a base) or Copper carbonate with dilute acids, as these are neutralization/decomposition reactions that do not require hydrogen displacement.
Step 4: Final Answer:
Method 3 (Action of dilute acid on metals) cannot be used for copper.
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