List of top Chemistry Questions on Balancing a redox reaction asked in MHT CET

In the reaction: \[ \text{Zn} + \text{CuSO}_4 \rightarrow \text{ZnSO}_4 + \text{Cu} \] Which substance is oxidized?
What is the oxidation state of chlorine in \( \text{Cl}_2 \text{O}_7 \)?