MCQ
Which of the following will show aromatic behaviour
- A

- ✓

- C

- D






$(2)$ $6$ $\pi$ electrons are present.
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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 |
$NH _{2} CN _{( s )}+\frac{3}{2} O _{2}( g ) \rightarrow N _{2( g )}+ O _{2}( g )+ H _{2} O _{(l)}$
is ............ $kJ$. (Rounded off to the nearest integer)
[Assume ideal gases and $\left. R =8.314\, J\, mol ^{-1} K ^{-1}\right]$