Question:
Which of the following represents the correct structure of Resorcinol?
Which of the following represents the correct structure of Resorcinol?
Show Hint
Remember the three important dihydroxybenzene isomers:
\[
\text{Catechol} = 1,2\text{-dihydroxybenzene}
\]
\[
\text{Resorcinol} = 1,3\text{-dihydroxybenzene}
\]
\[
\text{Hydroquinone} = 1,4\text{-dihydroxybenzene}
\]
or simply: Ortho = Catechol, Meta = Resorcinol, Para = Hydroquinone.
Updated On: Jun 18, 2026
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Recall the structure of dihydroxybenzenes.
There are three important isomeric dihydroxybenzenes: \[ \text{Catechol} = 1,2\text{-dihydroxybenzene} \] \[ \text{Resorcinol} = 1,3\text{-dihydroxybenzene} \] \[ \text{Hydroquinone} = 1,4\text{-dihydroxybenzene} \]
Step 2: Identify the arrangement of hydroxyl groups.
In resorcinol, the two hydroxyl groups are present at the \[ 1,3\text{-positions} \] of the benzene ring.
Thus, the hydroxyl groups are in the meta position with respect to each other.
Step 3: Compare with the given structures.
Option (1) contains hydroxyl groups at the para positions \((1,4)\), which corresponds to hydroquinone.
Option (3) contains hydroxyl groups at the ortho positions \((1,2)\), which corresponds to catechol.
Option (4) contains three hydroxyl groups and is not resorcinol.
Option (2) shows hydroxyl groups at the meta positions \((1,3)\), which is the structure of resorcinol.
Step 4: Final conclusion.
Therefore, the correct structure of resorcinol is \[ \boxed{\text{Benzene-1,3-diol}} \] Hence, the correct option is (2).
There are three important isomeric dihydroxybenzenes: \[ \text{Catechol} = 1,2\text{-dihydroxybenzene} \] \[ \text{Resorcinol} = 1,3\text{-dihydroxybenzene} \] \[ \text{Hydroquinone} = 1,4\text{-dihydroxybenzene} \]
Step 2: Identify the arrangement of hydroxyl groups.
In resorcinol, the two hydroxyl groups are present at the \[ 1,3\text{-positions} \] of the benzene ring.
Thus, the hydroxyl groups are in the meta position with respect to each other.
Step 3: Compare with the given structures.
Option (1) contains hydroxyl groups at the para positions \((1,4)\), which corresponds to hydroquinone.
Option (3) contains hydroxyl groups at the ortho positions \((1,2)\), which corresponds to catechol.
Option (4) contains three hydroxyl groups and is not resorcinol.
Option (2) shows hydroxyl groups at the meta positions \((1,3)\), which is the structure of resorcinol.
Step 4: Final conclusion.
Therefore, the correct structure of resorcinol is \[ \boxed{\text{Benzene-1,3-diol}} \] Hence, the correct option is (2).
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