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SSC CGL 2024 PYQ — Question 44

SSC CGL - 09 Sep 2024 - Shift 2 • General Awareness • Q44

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What is the IUPAC name of tertiarybutyl alcohol?

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Correct answer: A

Explanation

The correct answer is option 1 i.e. 2-Methylpropan-2-ol.

Tertiary butyl alcohol has the chemical formula (CH₃)₃COH. Its IUPAC name is 2-methylpropan-2-ol. The longest carbon chain contains 3 carbon atoms, making it a propane chain. The -OH (hydroxyl) group is attached to the second carbon atom. A methyl group (CH₃) is also attached to the second carbon atom.

Other options:

  • 1-propylpropan-3-ol: This suggests a 5-carbon chain, which is incorrect.
  • 1-Methylpropan-3-ol: This suggests a 4-carbon chain with the -OH group on the third carbon, which is incorrect.
  • 1-ethylpropan-3-ol: This also suggests a 4-carbon chain with an ethyl group on the first carbon and an -OH group on the third carbon, which is incorrect.