MCQ
Which of the following pair are not resonating structure ?
- A

- B

- ✓$C{H_2} = CH - CH = C{H_2}\, \leftrightarrow \,\dot C{H_2} - CH = CH - \dot C{H_2}$
- D




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| List-I Complex | List-II Primary valency and Secondary valency | ||
| (A) | $\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right] \mathrm{Cl}$ | (I) | 3 $\quad$ 6 |
| (B) | $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}\left(\mathrm{NO}_{2}\right)\right]$ | (II) | 3 $\quad$ 4 |
| (C) | $\mathrm{Hg}\left[\mathrm{Co}(\mathrm{SCN})_{4}\right]$ | (III) | 2 $\quad$ 6 |
| (D) | $[\mathrm{Mg}(\mathrm{EDTA})]^{2-}$ | (IV) | 2 $\quad$ 4 |

