The total number of species from the following in which one unpaired electron is present, is . . . . . . $\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}$
The total number of species from the following in which one unpaired electron is present, is . . . . . . $\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}$
- [JEE MAIN 2024]
- A
$2$
- B
$3$
- C
$4$
- D
$8$
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$AX$ is a covalent diatomic molecule where $A$ and $X$ are second row elements of periodic table. Based on Molecular orbital theory, the bond order of $AX$ is $2.5$. The total number of electrons in $AX$ is ........... (Round off to the Nearest Integer).
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- [JEE MAIN 2021]
Match List$-I$ with List$-II.$
List$-I$
List$-II$
$(a)$ $Ne _{2}$
$(i)$ $1$
$(b)$ $N _{2}$
$(ii)$ $2$
$(c)$ $F _{2}$
$(iii)$ $0$
$(d)$ $O _{2}$
$(iv)$ $3$
Choose the correct answer from the options given below:
Match List$-I$ with List$-II.$
| List$-I$ | List$-II$ |
| $(a)$ $Ne _{2}$ | $(i)$ $1$ |
| $(b)$ $N _{2}$ | $(ii)$ $2$ |
| $(c)$ $F _{2}$ | $(iii)$ $0$ |
| $(d)$ $O _{2}$ | $(iv)$ $3$ |
Choose the correct answer from the options given below:
- [JEE MAIN 2021]
Which of the following species show maximum bond length ?
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