MCQ
$\ \ \ \ \ \ \ \ \ \text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ |\\\text{CH}_3​−\text{C}​​​−\text{CH}_2​−\text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ |\\​\ \ \ \ \ \ \ \ \ \ \text{OH}$
The correct $\text{IUPAC}$ name of the above compound is:
  • A
    tert$-$ amyl alcohol
  • $2-$methylbutan$-2-ol$
  • C
    $2-$methylpentan$-2-ol$
  • D
    $1,1$ dimethyl propan$-1-ol$

Answer

Correct option: B.
$2-$methylbutan$-2-ol$
The $\text{IUPAC}$ name of the given compound is $2-$Methylbutan$-2-ol.$
The parent hydrocarbon contains $4$ carbon atoms and is named butane.
A methyl substituent is present at second $C$ atom.
A hydroxyl group is present at second $C$ atom.
Hence, the last alphabet e of butane is replaced with the suffix$ -2-ol.$

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