MCQ
Electrophiles are usually ……….
- ✓Lewis acid
- BLewis base
- CBronsted acid
- DBronted base
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Column – I | Column – II |
| A. Borazole | 1. $ \mathrm{B}(\mathrm{OH})_3 $ |
| B. Boric acid | 2. $ \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 $ |
| C. Quartz | 3. $ \mathrm{Na}_2\left[\mathrm{~B}_4 \mathrm{O}_5(\mathrm{OH})_4\right] 8 \mathrm{H}_2 \mathrm{O} $ |
| D. Borax | 4.$ \mathrm{SiO}_2 $ |
| Column I | Column II |
| A. Vitamin A | 1. Pellagra |
| B. Vitamin $B _1$ | 2. Xerophthalmia |
| C. Vitamin $B_2$ | 3. Beri Beri |
| D. Vitamin $B_3$ | 4. Cheilosis |