MCQ
Correct energy value order is :-
- A$ns\, np\, nd(n -1)f$
- B$ns\, np(n -1)d\, (n -2)f$
- C$ns\, np(n -1)d\, (n -1)f$
- ✓$ns(n -1)d\, n(n -1)f$
✓
Answer
Correct option: D.
$ns(n -1)d\, n(n -1)f$
d
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Bleaching action of chlorine is due to
$C{H_3} - C \equiv CH\xrightarrow{{Na}}X\xrightarrow{{C{H_3} - Cl}}Y$, $Y$ is
→The wave number of the first emission line in the Balmer series of H-Spectrum is: ( R $=$ Rydberg constant)
→$LIST-I$ contains metal species and $LIST-II$ contains their properties.
→| $LIST-I$ | $LIST-II$ |
| $(I)$ $\left[ Cr ( CN )_6\right]^{4-}$ | $(P)$ $t_{2 g }$ orbitals contain 4 electrons |
| $(II)$ $\left[ RuCl _6\right]^{2-}$ | $(Q)$ $\mu$ (spin-only) $=4.9 BM$ |
| $(III)$ $\left[ Cr \left( H _2 O \right)_6\right]^{2+}$ | $(R)$ low spin complex ion |
| $(IV)$ $\left[ Fe \left( H _2 O \right)_6\right]^{2+}$ | $(S)$ metal ion in $4$+ oxidation state |
| $(T)$ $d^4$ species |
[Given : Atomic number of $Cr =24, Ru =44, Fe =26$ ] Metal each metal species in $LIST-I$ with their properties in $LIST-II$, and choose the correct option
Which of petroleum corresponds to kerosene oil
The formation of the oxide ion $O_{(g)}^{2 - }$ requires first an exothermic and then an endothermic step as shown below This is because
→${{O}_{(g)}}+{{e}^{-}}=O_{(g)}^{-}\Delta {{H}^{o}}=-142\ kJ\,mo{{l}^{-1}}$
$O_{(g)}^{-}+{{e}^{-}}=O_{(g)}^{2-}\Delta {{H}^{o}}=844\ kJ\,mo{{l}^{-1}}$
Arrange $N, O$ and $S$ in order of decreasing electron affinity
→How many of the transformation given below would result in aromatic amines?
The equilibrium constant for the reaction ${N_{2(g)}} + {O_{2(g)}}$ $\rightleftharpoons$ $2N{O_{(g)}}$ at temperature $T$ is $4 \times {10^{ - 4}}$. The value of ${K_c}$ for the reaction $N{O_{(g)}}$ $\rightleftharpoons$ $\frac{1}{2}{N_{2(g)}} + \frac{1}{2}{O_{2(g)}}$ at the same temperature is
→What is the debroglie wavelength of electron, in hydrogen atom, moving in an orbit having maximum magnetic quantum no. $ = +2$ $\mathop {\rm{A}}\limits^{\rm{o}} $
→