Question

Match the reactions given in Column I with the major product formed given in Column II.

• A. \( A = Q,\; B = R,\; C = S,\; D = P \)
• B. \( A = Q,\; B = P,\; C = S,\; D = R \)
• C. \( A = R,\; B = S,\; C = Q,\; D = P \)
• D. \( A = S,\; B = R,\; C = Q,\; D = P \)

Hint:

For matching organic reactions, identify the named reaction firstReimer-Tiemann gives salicylaldehyde, Kolbe-Schmitt gives salicylic acid, and acetylation of salicylic acid gives aspirin.

Answer 1

The Correct Option is A

Step 1: Identify reaction A.
In reaction A, benzene diazonium chloride first undergoes hydrolysis with water to form phenol.
Then phenol reacts with \( CHCl_3/NaOH \), followed by acidification. This is Reimer-Tiemann reaction.
The major product formed is salicylaldehyde, which corresponds to product \( Q \).
So:
\[ A = Q \]

Step 2: Identify reaction B.
In reaction B, benzene diazonium chloride first forms phenol by hydrolysis.
Then phenol reacts with benzoyl chloride \( C_6H_5COCl \) in the presence of \( NaOH \).
This gives phenyl benzoate, which corresponds to product \( R \).
So:
\[ B = R \]

Step 3: Identify reaction C.
In reaction C, sodium phenoxide reacts with \( CO_2 \) under pressure and heat.
This is Kolbe-Schmitt reaction and gives salicylic acid after acidification.
Further reaction with acetic anhydride gives acetyl salicylic acid, commonly known as aspirin.
This corresponds to product \( S \).
So:
\[ C = S \]

Step 4: Identify reaction D.
In reaction D, cumene reacts with oxygen followed by acid hydrolysis to form phenol.
Phenol on oxidation with \( Na_2Cr_2O_7/H^+ \) gives benzoquinone.
This corresponds to product \( P \).
So:
\[ D = P \]

Step 5: Final matching.
Thus, the correct matching is:
\[ A = Q,\quad B = R,\quad C = S,\quad D = P \]
Therefore:
\[ \boxed{A = Q,\; B = R,\; C = S,\; D = P} \]