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Hydrocarbons — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryHydrocarbons1 Mark
MCQ
The correct IUPAC name of the given structure $\text{H}_3\text{C}-\text{CH}-\text{C}\equiv\text{CH}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$ is:
  • A
    2-methylbut-1-yne
  • B
    1-methylbut-3-yne
  • C
    2-methylbut-3-yne
  • D
    3-methylbut-1-yne
✓

Answer

  1. 3-methylbut-1-yne

Explanation:

$\text{H}_3\stackrel{{4}}{\hbox{C}}-\stackrel{{3 \ \ \ \ }}{\hbox{CH}}-\stackrel{{2}}{\hbox{C}}\equiv\stackrel{{1 \ \ \ \ }}{\hbox{CH}}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\\ \ \ \ \ \ \ _{3-\text{methylbut-1-yne}}$​​​​​​​

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