The value of orbital angular for d-electron will be:
- A$\frac{4 h}{2 \pi}$
- B$\frac{6 h}{2 \pi}$
- C$\frac{\sqrt{12} h}{2 \pi}$
- ✓$\frac{\sqrt{6} h}{2 \pi}$
Answer: D.
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M.C.Q (1 Marks)
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18 Q→One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Answer: D.
View full solution →Answer: D.
View full solution →Answer: B.
View full solution →Answer: A.
View full solution →Answer: C.
View full solution →| 1. | $n=4$ | $l=2$ | $m_l=-2$ | $m_s=-\frac{1}{2}$ |
| 2. | $n=3$ | $l=2$ | $m_l=1$ | $m_s=+\frac{1}{2}$ |
| 3. | $n=4$ | $l=1$ | $m_l=0$ | $m_s=+\frac{1}{2}$ |
| 4. | $n=3$ | $l=2$ | $m_l=-2$ | $m_s=-\frac{1}{2}$ |
| 5. | $n=3$ | $l=1$ | $m_l=-1$ | $m_s=+\frac{1}{2}$ |
| 6. | $n=4$ | $l=1$ | $m_l=0$ | $m_s=+\frac{1}{2}$ |
| Column A | Column B |
| (1) Zero energy of electron | (a) 2s, 2p. |
| (2) Orbitals in second shell | (b) 4 |
| (3) Maximum number of electrons in dorbital | (c) at infinite |
| (4) Number of lobes in d-orbital | (d) 10 |
| Column A | Column B |
| (1) Shape of orbitals | (a) $-13.6 \times \frac{ Z ^2}{n^2} eV$ per atom |
| (2) First postulate of Bohr model | (b) Total values of 1 |
| (3) Energy of electrons in Bohr's orbital $\left( E _{ n }\right)$ | (c) Azimuthal quantum numbers |
| (4) Number of subshells in any shell | (d) $m V^2=\frac{ Ze ^2}{r}$ |
| Column A | Column B |
| (1) Energy mass equation of Einstein | (a) $KE =\frac{1}{2} m v^2$ |
| (2) Wavelength of Balmer series | (b) Linear spectrum |
| (3) Atomic spectrum | (c) $4000 Å-7000 Å$ |
| (4) Kinetic energy | (d) $E = mc ^2$ |
| Column A | Column B |
| (1) Nodal plane for $P _x$ orbital | (a) 6s, 5p, 4d |
| (2) 3 unpaired electrons in nitrogen | (b) yz |
| (3) Orbitals for n = 5, $l$=2 and m =0 | (c) Hund's law of maximum |
| (4) Orbitals for n+$l$ = 6 | (d) $5 dz ^2$ |
| Column A | Column B |
| (1) Wavenumber | (a) Principal quantum numbers |
| (2) Radius of Bohr shell | (b) $2 n^2$ |
| (3) Maximum number of electrons in any orbital | (c) $\frac{1}{\lambda}$ |
| (4) K, L, M, N, O | (d) $\frac{n^2}{Z} \times 0.529 Å$ |
| $\lambda( nm )$ | 500 | 450 | 400 |
| $v \times 10^{-8}\left(cm s ^{-1}\right)$ | 2.55 | 4.35 | 5.35 |
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