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D Devendra Khairwa
When methyl chloride is treated with KCN the following reaction occurs:-                                 

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D Devendra Khairwa
When methyl bromide is treated with sodium in the presence of dry ether then following reaction occurs:-                                        

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D Devendra Khairwa
When ethyl chloride is treated with aqueous KOH the following reaction occurs :-                                        

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D Devendra Khairwa
The reaction is given below :-                                                

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D Devendra Khairwa
 When bromobenzene is treated with Mg in the presence of dry ether the following reaction occurs :-                             

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D Devendra Khairwa
When n-butyl chloride is treated with alcoholic KOH the following reaction occurs:-                                

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D Devendra Khairwa
With the given formula we have two alkyl halides They are n - butyl bromide and isobutyl bromide. For the first set of reaction we get two possibilities:-                                             Therefore compound (d) is 2, 5-dimethylhexane.                                                                     

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D Devendra Khairwa
In an aqueous solution, KOH almost completely dissociates into OH - ions. We know that OH - ions are strong nucleophile, which leads the alkyl chloride to undergo a reaction to form alcohol. But an alcoholic solution of KOH contains alkoxide (RO - ) ion, which is a strong base. Thus, it can remove hydrogen from the β-carbon of the alkyl chloride and form an alkene.  The OH - ion is a weaker...

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D Devendra Khairwa
The mechanism for the given reaction is as follows :-                         

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D Devendra Khairwa
The mechanism of the given reaction is :-                                           

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D Devendra Khairwa
 The mechanism for the given reaction is :-                             

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D Devendra Khairwa
(xvii) The mechanism of the reaction is :-                                        

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D Devendra Khairwa
 The mechanism of the reaction is given below :-                                

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D Devendra Khairwa
(xv) The required mechanism is given below :-                            

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D Devendra Khairwa
(xiv) The proposed mechanism is :-                                   

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D Devendra Khairwa
The mechanism is given below :-                                      

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D Devendra Khairwa
 The mechanism of the given reaction is :-                                 
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