MCQ
Which one of the following species has plane triangular shape ?
- A$N_3$
- ✓$NO_{3}^-$
- C$NO_{2}^-$
- D$CO_2$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Column $-I$ | Column $-II$ |
| $(A)$ Aniline | $(i)$ Red colour with $FeCl_3$ |
| $(B)$ Benzene sulfonic acid | $(ii)$ Violet colour with sodium nitroprusside |
| $(C)$ Thiourea | $(iii)$ Blue colour with hot and acidic solution of $FeSO_ 4$ |