STANDARDChemistry-Alkenes and Alkynes
STANDARD Chemistry Reactions and Conversions MCQ Question
Type: MCQ-conceptual-Hard
Choose the correct reagents used in the conversion. CH₂ = CH₂ → CH₃ - CH₂ → CH₂ = CHBr → CH ≡ CH
A
p-Br₂, q-alc. KOH, r-NaOH, s-Al₂O₃
B
p-HBr, q-alc. KOH, r-CaC₂, s-KMnO₄
C
p-HBr, q-alc. KOH, r-NaNH₂, s-red hot iron tube
D
p-Br₂, q-alc. KOH, r-NaNH₂, s-red hot iron tube
Correct Answer
Option D
Detailed Explanation
The conversion involves halogenation, dehydrohalogenation, and dehydrogenation steps. Br₂ adds across the double bond, alc. KOH removes HBr, NaNH₂ removes HBr again, and the red hot iron tube facilitates dehydrogenation.
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