Match the entries of column I with appropriate entries of column II and choose the correct option out of the four options given.
| Column I | Column II |
| (A) Acetic acid | (p) Sodium hypoiodite |
| (B) Formic acid | (q) Disproportionation |
| (C) Acetone | (r) Fehling's solution |
| (D) Benzaldehyde | (s) HVZ reaction |
Answer & explanation
Correct answer: option 2
Hell Volhard Zelinsky Reaction Mechanism is quite different from other halogenation reactions as it takes place in the absence of a halogen carrier. The reaction is used for the halogenation of carboxylic acids at the alpha carbon.
Fehling’s Solution: When formic acid is warmed with Fehling’s solution, a brick red ppt. of cuprous oxide is obtained.
Acetone is oxidised by sodium hypoiodite, resulting in a yellow precipitate of iodoform and a sodium salt of acetic acid.
The disproportionation of an aldehyde into a carboxylic acid and the corresponding alcohol in the Cannizaro reaction is base-catalyzed. Taking benzaldehyde as an example, the first step involves addition of a hydroxyl ion to the benzaldehyde.
