MCQ
Trisilyamine $(SiH_3)_3N$ is
- Atrigonal pyramidal and acidic
- Btrigonal pyramidal and basic
- Ctrigonal pyramidal and neutral
- ✓trigonal planar and weakly basic
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| Element | $Fe$ | $Co$ | $Ni$ | $Cu$ |
| Metallic radii/pm | $126$ | $125$ | $125$ | $128$ |
($A$) $\mathrm{LiAlH}_4$ in $\left(\mathrm{C}_2 \mathrm{H}_5\right)_2 \mathrm{O}$
($B$) $\mathrm{BH}_3$ in $THF$
($C$) $\mathrm{NaBH}_4$ in $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$
($D$) Raney $\mathrm{Ni} / \mathrm{H}_2$ in $\mathrm{THF}$
($en=$ ethylenediamine)