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Complete the following statements by selecting the correct alternative from the
choices given:
When acetaldehyde is treated with Grignard reagent, followed by hydrolysis the
product formed is:
Primary alcohol
Secondary alcohol
Carboxylic acid
Tertiary alcohol
B.
Secondary alcohol
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C.
Three sigma bonds and two pi bondsAn alkyl bromide undergoes reaction in the alkaline medium to form the corresponding alcohol. When the concentration of the alkyl bromide is doubled keeping the concentration of the alkali constant, the rate of the reaction is doubled. When the concentration of the alkali is doubled keeping the concentration of the alkyl bromide constant, the rate of the reaction remains the same.
Write the mechanistic steps for the reaction and state the type of the reaction and the nature of the reagent.
The reaction is nucleophilic substitution because in the reaction a weaker nucleophile (Br-) is replaced by stronger nucleophile (OH-). Since the rate of reaction depends only on the concentration of alkyl bromide it follows SN 1 mechanism. The reagent is nucleophile.
Mechanism
The reaction follows the process of racemisation and results in formation racemic mixture.
The formation of chlorobenzene from benzene is a SN2 reaction.
The formation of chlorobenzene is an electrophilic substitution reaction.
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Mock Test Series
