MCQ
The number of possible resonance structures for $CO_3^{2 - }$is
- A$2$
- ✓$3$
- C$6$
- D$9$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$A$. $Al^{3+}$ $B$. $Cu^{2+}$ $C$. $Ba^{2+}$ $D$. $Co^{2+}$ $E$. $Mg^{2+}$
Choose the correct answer from the options given below.
Atomic no. : $Mn = 25,\,Fe = 26,\,Co = 27,\,Ni = 28$
