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प्रश्न
Write the mechanism of the following reaction :

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उत्तर १
Primary alcohols such as ethanol react by SN2 mechanism with halogen acid such as HBr as follows:

उत्तर २
This is a nucleophilic substitution reaction. It follows SN2 mechanism. The mechanism is as follows:
1) Protonation of hydroxyl group to make it a good leaving group.
2) Displacement of water molecule by bromide ion to form alkyl bromide.

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संबंधित प्रश्न
Give reasons for the following:
o-nitrophenol is more acidic than o-methoxyphenol.
Cyclohexene is best prepared from cyclohexanol by which of the following:
\[\ce{CH3CH2OH}\] can be converted into \[\ce{CH3CHO}\] by ______.
Identify the secondary alcohols from the following set:
- \[\ce{CH3CH2CH(OH)CH3}\]
- \[\ce{(C2H5)3COH}\]


Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert-butyl ether can’t be prepared by this method. Explain.
Which of the following alcohols will not undergo oxidation?
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
