MCQ
H – N – H bond angle in NH3 is …………
- A109° 28’
- B107° 28’
- C104°
- ✓107°
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| 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 $ |