Question

Gem dihalides on treatment with alcoholic KOH give :
(a) alkyne (b) alkene
(c) alkane (d) all of these

Answer 1

Answer:

gem dihalides on treatment with alcoholic KOH give alkyne,alkene,alkane three of them

Answer 2

Gem dihalides on treatment with alcoholic KOH give  alkyne.

Option (a)

Explanation:

• Geminal dihalides are called as Gem dihalides.
• In Gem dihalides, di halides are attached to the same carbon atom.
• It is opposite to Vicinyl dihalide in which two halogens are  attached to adjacent carbon atoms.
• They are also called as Alkylidene halides.
• Gem dihalides undergo dehydrohalogenation reaction with a strong base like Potassium hydroxide.
• It results in the elimination of a hydrogen halide from a substrate.
• KOH refers to Potassium hydroxide.
• It is colourless and commonly known as Caustic Potash.

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