Question

Assertion (A): When a piece of magnesium metal is placed in copper sulphate solution, then magnesium sulphate solution and copper metal are formed.

Reason (R): The displacement reaction between copper sulphate solution and magnesium occurs because copper is less reactive than magnesium.

Options

• Both A and R are true and R is correct explanation of the assertion.

• Both A and R are true but R is not the correct explanation of the assertion.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true and R is correct explanation of the assertion.

Explanation:

Assertion (A) is true because magnesium is highly reactive and chemically displaces copper from a copper sulphate solution, forming magnesium sulphate and solid copper metal. Reason (R) is also true and serves as the correct explanation because a displacement reaction can only happen when the invading metal (magnesium) holds a higher position in the reactivity series than the metal inside the solution (copper).