Question:
Which of the following alcohol is dehydrated most easily by concentrated $ {H_2SO_4}$
Which of the following alcohol is dehydrated most easily by concentrated $ {H_2SO_4}$
Updated On: Jun 20, 2022
- $\ce{p - O2NC6 H4 CH (OH) CH3}$
- $\ce{p - ClC6 H4 CH (OH) CH3}$
- $\ce{p - CH3 OC6 H4 CH (OH) CH3}$
- $\ce{C6 H5 CH (OH) CH3}$
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The Correct Option is C
Solution and Explanation
The case of dehydration of alcohol takes place most easily in case $(c)$.
In all cases during dehydration carbocation is formed.
In case $(a)$, carbocation destabilise by $NO_2(- I)$ group hence, dehydration reaction proceed with difficulty.
In case $(b)$ dehydration reaction takes place less difficulty than case $(a)$ because $Cl$ group show $(-I)$ and $(+R)$ effect.
In case $(c)$ dehydration reaction proceed easily because carbocation is stabilised by $OCH_3(+R)$ group.
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Concepts Used:
Alcohols
What is Alcohol?
Alcohol is a derivative of water (H2O) that has one, two, or more hydroxyl groups that are attached to a carbon atom of a hydrocarbon chain (an alkyl group). It is one of the most common organic compounds used in sweeteners, fragrances, and medicine.
Read More: Types of Alcohol
Uses of Alcohol:
- Ethanol is the alcohol used in alcoholic drinks. It can be used as an industrial methylated spirit where methanol is used very little in quantity as it can be dangerous.
- It is used as fuel to produce carbon dioxide and water by the process of fermentation. Whereas methanol burns carbon dioxide and water to facilitate combustion.
- Alcohol is an organic compound used as a solvent that is insoluble in water.
- It can be used to lower the level of sugar.
- Alcohol is used as a preservative in laboratories.