MCQ
Beryllium’s fourth electron will have the four quantum numbers :
- A$n=1,l=0,m=0,s=+1/2$
- B$n=1,l=1,m=1,s=+1/2$
- ✓$n=2,l=0,m=0,s=-1/2$
- D$n=2,l=1,m=0,s=+1/2$
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| Column $- I$ | Column $-II$ | ||
| $(A)$ | $V_2O_5$ | $(i)$ | Haber's process |
| $(B)$ | $Ni$ | $(ii)$ | Prepartion of $O_2$ from $KClO_3$ |
| $(C)$ | $MnO_2$ | $(iii)$ | Conversion of $SO_2$ to $SO_3$ |
| $(D)$ | $Fe$ | $(iv)$ | Hydrogenation of oils |
(Given : Molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ Ethyl alcohol : $46$,
water : $18$)