Punjab PSEB Matric Science Practice Questions - Punjab School Education Board (PSEB) Matric (Class 10) Science - Physics, Chemistry & Biology Exam

When iron nails are placed in copper sulphate solution, the blue colour fades because:

iron oxidises copper ions only copper is displaced by iron and copper metal deposits copper sulphate evaporates iron dissolves without any chemical change

Correct Answer:

copper is displaced by iron and copper metal deposits

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