Which of the following is not a Lewis base?
- A$NH_3$
- B$O_2^-$
- C$H_2O$
- D$I^+$
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Which of the following sets is not isoelectronic?
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The set of molecules in which the central atom does not obey the octet rule is
Number of $\pi$ electrons in cyclobutadienyl anion $({C_4}{H_4})^{2-}$ is
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View SolutionMatch the following molecules in Column $I$ with the number of lone pairs on their central atom in Column $II$.
Column $I$ (Molecules) Column $II$ (Number of lone pairs on central atom) $A. \ NH_3$ $1. \ \text{Two}$ $B. \ H_2O$ $2. \ \text{Three}$ $C. \ XeF_2$ $3. \ \text{Zero}$ $D. \ CH_4$ $4. \ \text{Four}$ $5. \ \text{One}$
| Column $I$ (Molecules) | Column $II$ (Number of lone pairs on central atom) |
|---|---|
| $A. \ NH_3$ | $1. \ \text{Two}$ |
| $B. \ H_2O$ | $2. \ \text{Three}$ |
| $C. \ XeF_2$ | $3. \ \text{Zero}$ |
| $D. \ CH_4$ | $4. \ \text{Four}$ |
| $5. \ \text{One}$ |
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