JEE MAIN - Chemistry (2024 - 9th April Morning Shift - No. 25)
The total number of species from the following in which one unpaired electron is present, is _______.
$$\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}$$
Answer
4
Explanation
| Species | Unpaired e |
|---|---|
| $$ \mathrm{N}_2 $$ |
0 |
| $$ \mathrm{O}_2 $$ |
2 |
| $$ \mathrm{C}_2^{-} $$ |
1 |
| $$ \mathrm{O}_2^{-} $$ |
1 |
| $$ \mathrm{O}_2^{2-} $$ |
0 |
| $$ \mathrm{H}_2^{+} $$ |
1 |
| $$ \mathrm{CN}^{-} $$ |
0 |
| $$ \mathrm{He}_2^{+} $$ |
1 |
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