How would you account for the increasing oxidising power in the series `VO_2^(o+)ltCr_2O_7^(2-)MnO_4^(ɵ)`?

Explanation

To account for the increasing oxidizing power in the series \( VO_2^+ < Cr_2O_7^{2-} < MnO_4^- \), we will analyze the oxidation states of the metals involved and their ability to get reduced.

### Step-by-step Solution:

1. **Identify the Oxidation States:**
- For \( VO_2^+ \):
\[
\text{Let the oxidation state of V be } x.
...