MCQ
Which of the following orbital is not possible
- ✓$3 f$
- B$4 f$
- C$5 f$
- D$6 f$
✓
Answer
Correct option: A.
$3 f$
a
The possible values in a shell $I=(n-1)$. In third orbit possible $'l'$ values are $O(s), 1(p), 2(d)$ But not $3(f)$
The possible values in a shell $I=(n-1)$. In third orbit possible $'l'$ values are $O(s), 1(p), 2(d)$ But not $3(f)$
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
Consider the following statements pertaining to fuel cells :-
$(a)$ Hydrogen oxygen fuel cell make use of concentrated $KOH$ solution as electrolyte and porous graphite impregnated with platinum as electrodes
$(b)$ The efficiency of fuel cell is less then unity due to polarisation at electrodes and the resistance offered by the electrode and the electrolyte
$(c)$ The electrical work, assuming the cell to be working reversibly may be represented as $-\Delta G = W_{electrical} = -\Delta H + T \Delta S$
Which of the above statements are correct
→$(a)$ Hydrogen oxygen fuel cell make use of concentrated $KOH$ solution as electrolyte and porous graphite impregnated with platinum as electrodes
$(b)$ The efficiency of fuel cell is less then unity due to polarisation at electrodes and the resistance offered by the electrode and the electrolyte
$(c)$ The electrical work, assuming the cell to be working reversibly may be represented as $-\Delta G = W_{electrical} = -\Delta H + T \Delta S$
Which of the above statements are correct
Which of the following does not apply to metallic bond
Assuming fully decomposed, the volume of $C{O_2}$ released at $STP$ on heating $9.85\,g$ of $BaC{O_3}$ (Atomic mass of $Ba=137$) will be ................ $\mathrm{L}$
→Compare relative stability of the following resonating structure.
The statement that is not correct for the periodic classification of elements is
If electron falls from $n = 3$ to $n = 2$, then emitted energy is ........... $\mathrm{eV}$
→Which type of bond is present in ${H_2}S$ molecule
→The heat of solution of anhydrous $\mathrm{CuSO}_4$ and $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ are $-70 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $+12 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively.
→The heat of hydration of $\mathrm{CuSO}_4$ to $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ is $-\mathrm{xkJ}$. The value of $\mathrm{x}$ is. . . . . . .
When enthalpy and entropy change for a chemical reaction are $ - 2.5\, \times {10^3}\,cal$ and $7.4\,cal$ ${\deg ^{ - 1}}$ respectively. Predict the reaction at $298\,K$ is
→The $IUPAC$ name of compound is
→