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Haloalkanes and Haloarenes
Question
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How would you bring about the following conversions?
Bromoethane to ethyne

Answer

Bromoethane is treated with alc. KOH, it forms ethene which on bromination gives 1,2 dibromoethane. Further reaction of 1,2 dibromoethane with alc. KOH, it gives ethyne.
 

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Some More Questions From Haloalkanes and Haloarenes Chapter

Write structures of the following compounds:
1-chloro-4-ethylcyclohexane

Write structures of the following compounds:
4-tert-Butyl-3-iodohaptane

Write structures of the following compounds:
1, 4-Dibromo but-2-ene

Write structures of the following compounds:
1-Bromo-4-sec butyl-2-methyl benzene.

Why is sulphuric acid not used during the reaction of alcohols with KI?

Write structures of different dihalogen derivatives of propane.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:

i) A single monochloride.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:

i)Three isomeric monochlorides.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:
Four isomeric monochlorides.

Draw the structures of major monohalo products in each of the following reactions: