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Question

Alkanes are prepared by the following methods
I) Decarboxylation of salts of fatty acids
II) Wurtz reaction

III) Kolbe's electrolysis
IV) Sabatier - Senderen's reaction

V) Reduction of alkyl halides

In which of these methods, a sigma bond is formed between carbon atoms


A

All

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B

Only II, III, IV

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C

Only II, III

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D

Only I, IV, V

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Solution

The correct option is C.

Only II, III

Wurtz reaction: Wurtz reaction is an organic chemical coupling reaction wherein sodium metal is reacted with two alkyl halides in the environment provided by a solution of dry ether in order to form a higher alkane along with a compound containing sodium and the halogen.

Kolbe's electrolysis: Kolbe's electrolysis method uses sodium salt of fatty acid to form the corresponding alkane as a product. In this reaction, the decarboxylation of the sodium salt of fatty acid takes place.

C - C bond is formed in wurtz and Kolbe's reaction.


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