MCQ
Configuration of $Yb^{+2}$ is
- A$[Xe]\,4f^{14}\, 5d^1$
- ✓$[Xe]\,4f^{14}$
- C$[Xe]\,4f^{14}\, 6s^2$
- D$[Xe]\,4f^{14}\,5d^1\,6s^2$
hence $Yb^{+2}$ is $[Xe]\,4f^{14}$
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(Given: Atomic number: $V , 23 ; Cr , 24 ; Fe , 26;Ni , 28)$
$V ^{3+} \cdot Cr ^{3+}, Fe ^{2+}, Ni ^{3+}$
| List $I$ Name of reaction | List $II$ Reagent used |
| $A$ Hell-Volhard-Zelinsky reaction | $I$ $NaOH + I _2$ |
| $B$ Iodoform reaction | $II$ (i) $CrO _2 Cl _2, CS _2$ (ii)$H _2 O$ |
| $C$ Etard reaction | $III$ (i) $Br _2 /$ red phosphorus (ii) $H _2 O$ |
| $D$ Gatterman-Koch reaction | $IV$ $CO , HCl$, anhyd.$AlCl_3$ |
Choose the correct answer from the options given below:
