Assertion (A): When a piece of copper metal is added to dilute sulphuric acid, the solution turns blue.
Reason (R): Copper reacts with dilute sulphuric acid to form blue copper (II) sulphate solution.
Answer
- When a piece of copper metal is added to dilute sulphuric acid, the solution turns blue .
- Copper is more reactive than Hydrogen (check reactivity series )
- So it replaces Hydrogen from its solution to form blue copper (II) sulphate solution
- Hydrogen is liberated in gaseous form.
The reaction is as follows:
Cu + H 2 SO 4 →CuSO 4 + H 2
Thus,
- Assertion is True.
- Reason is also True.
- And Reason is the correct explanation for the assertion.
So, the correct answer is (a)
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