MCQ
Following Hund’s rule which element contains six unpaired electron
- A$Fe$
- B$Co$
- C$Ni$
- ✓$Cr$

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| Reaction | Product | |
| $I$ | $RX + AgCN$ | $RNC$ |
| $II$ | $RX + KCN$ | $RCN$ |
| $III$ | $RX + KNO_2$ | (image) |
| $IV$ | $RX + AgNO_2$ | $R-O-N = O$ |



