MCQ
$C_6H_{13}Br + OH^- \to C_6H_{13}OH + Br^-$ is an example of
- ANucleophilic addition
- ✓Nucleophilic substitution
- CElectrophilic addition
- DElectrophilic substitution
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$(I)$ Only $C$ react with $0.10\, M\, HCl$ to give $H_2(g)$
$(II)$ When $A$ is added to solution of the other metal ions, metallic $D$ is formed but not $B$ or $C$

(Given: Atomic no. $Eu, 63; Sm , 62 ; Tm , 69 ; Tb$, $65 ; Yb , 70 ; Dy , 66]$