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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Reason : Transparent bead $(NaBO_2 + B_2O_3)$ forms coloured bead with coloured cation.
$(a)$ Effective nuclear charge for nitrogen is $3.90$
$(b)$ $IP$ of $Ne$ is more than $Na^+$
$(c)$ Order of electron negativity $sp > sp^2 > sp^3$
$(d)$ Order of acidic character $NH_3 < PH_3 < AsH_3$