The correct combination of names for isomeric alcohols with molecular formula $\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}$ is/are

(A) tert-butanol and 2-methylpropan-2-ol; (C) n-butanol and butan-1-ol; (D) isobutyl alcohol and 2-methylpropan-1-ol

(B) tert-butanol and 1, 1-dimethylethan-1-ol

JEE Advanced · 2014 · 25 May 2014 · Paper 1 · General Organic Chemistry

The correct combination of names for isomeric alcohols with molecular formula

C_{4} H_{10} O

is/are

(A)tert-butanol and 2-methylpropan-2-ol✓ Correct
(B)tert-butanol and 1, 1-dimethylethan-1-ol
(C)n-butanol and butan-1-ol✓ Correct
(D)isobutyl alcohol and 2-methylpropan-1-ol✓ Correct

Answer: (A), (C), (D)

Solution

The question asks for correct combinations of names for the same isomeric alcohol. (A) tert-butanol and 2-methylpropan-2-ol are the same compound — both names refer to the same structure with the OH group on a tertiary carbon. (C) n-butanol and butan-1-ol are the same compound — both refer to the straight-chain primary alcohol. (D) isobutyl alcohol and 2-methylpropan-1-ol are the same compound — both refer to the branched primary alcohol. (B) is incorrect because 1,1-dimethylethan-1-ol is not a valid IUPAC name (the numbering is redundant). Hence (A), (C), and (D) are correct.

JEE Advanced · 2014 · 25 May 2014 · Paper 1 · One or more correct options

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JEE Advanced · 2014 · 25 May 2014 · Paper 1 · General Organic Chemistry

Solution

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