MCQ
Maximum unpaired electrons are present in
- ✓$O_2$
- B$O_2^-$
- C$O_2^+$
- D$O_2^{2-}$
$1 s ^2 * 1 s ^2 2 s ^2 * 2 s ^2 2 pz ^2 2 px ^2 2 py ^2 * 2 px ^1 * 2 py ^1$
The electronic configuration of the $O _2^{+}$containing $16$ electrons can be written as:
$1 s ^2 * 1 s ^2 2 s ^2 * 2 s ^2 2 pz ^2 2 px ^2 2 py ^2 * 2 px ^1 * 2 py ^0$
The electronic configuration of the $O _2^{-}$ion containing $17$ electrons can be written as:
$1 s ^2 * 1 s ^2 2 s ^2 * 2 s ^2 2 pz ^2 2 px ^2 2 py ^2 * 2 px ^2 * 2 py ^1$
The electronic configuration of the $O _2^{-2}$ ion containing $18$ electrons can be written as:
$1 s ^2 * 1 s ^2 2 s ^2 * 2 s ^2 2 pz ^2 2 px ^2 2 py ^2 * 2 px ^2 * 2 py ^2$
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Compound $(B)$ is
| List$-I$ | List$-II$ |
| $A$ $16\,g \text { of } CH _{4( g )}$ | $I$ Weighs $28\,g$ |
| $B$ $1\,g \text { of } H _{2( g )}$ | $II$ $60.2 \times 10^{23}$ electrons |
| $C$ $1\,mole \text { of } N _{2( g )}$ | $III$ Weighs $32\,g$ |
| $D$ $0.5\,mol$ of $SO _{2( g )}$ | $IV$ Occupies $11.4\,L$ volume at STP |
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