MCQ
Orbital angular momentum for a $d-$ electron is
- A$\frac{{6h}}{{2\pi }}$
- ✓$\frac{{\sqrt 6 \,h}}{{2\pi }}$
- C$\frac{{12h}}{{2\pi }}$
- D$\frac{{\sqrt {12} \,h}}{{2\pi }}$
$\mu = \sqrt {l(l + 1)} \,\frac{h}{{2\pi }}$; $\mu = \sqrt {2\,(2 + 1)} \,\frac{h}{{2\pi }}$
$\mu = \sqrt {2\,(2 + 1)} \frac{h}{{2\pi }}$; $\mu = \,\sqrt 6 \frac{h}{{2\pi }}.$
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Assertion $(A)$: Among group $13$ elements, boron's melting point is unusually high $(2453 \mathrm{~K})$.
Reason $(R):$ Solid boron has a strong crystalline lattice.
In the context of the above statements, choose the correct answer from the following options:
$B\xleftarrow{{Pd + CaC{O_3}}}R - C \equiv C - R\xrightarrow{{liq.N{H_3} + Na}}A$
$A$ and $B$ are geometrical Isomers. Then

