MCQ
Haloforms are trihalogen derivatives of
- AEthane
- ✓Methane
- CPropane
- DBenzene
$C{{H}_{4}}\underset{+3X}{\mathop{\xrightarrow{-3H}}}\,CH{{X}_{3}}$$(X = Cl,Br,I)$
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(Given: Atomic no. $Eu, 63; Sm , 62 ; Tm , 69 ; Tb$, $65 ; Yb , 70 ; Dy , 66]$