Question:

Two aromatic compounds having formula $C_7H_8O$ which are easily identifiable by $FeCl_3$ solution test (violet colouration) are

Updated On: Apr 27, 2024
  • $o$-cresol and benzyl alcohol
  • $m$-cresol and $p$-cresol
  • $o$-cresol and $p$-cresol
  • methyl phenyl ether and benzyl alcohol
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The Correct Option is A

Solution and Explanation

$o-, m$ - and $p$ - cresol all contain phenolic group, thus they give violet colouration with $FeCl _{3}$ whereas benzylalcohol and methyl phenyl ether donot contain phenolic group, hence give no colouration with $FeCl _{3}$. Hence the pair of compounds which are identifiable by $FeCl _{3}$ is o-cresol and benzyl alcohol.


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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.