Question

Compound A, C₈H₁₀O, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell.
A and Y are respectively

• A.

  

• B.

  

• C.

  

• D.

  

Answer 1

The Correct Option is B

The question involves identifying a compound A, with the molecular formula C₈H₁₀O, which reacts with sodium hypoiodite (NaOI) to yield a yellow precipitate with a characteristic smell. The compound A and Y need to be identified.

To solve this, let's analyze the reaction:

1. Compound A reacts with NaOI to give a yellow precipitate and a characteristic smell. This reaction is indicative of the iodoform test. The iodoform test is positive for compounds with the group -COCH₃ or secondary alcohols with a methyl group at the adjacent carbon.
2. Given the molecular formula C₈H₁₀O, compound A could be an aromatic ketone or an alcohol. Considering the equation C₆H₅COCH₃ (acetophenone) fits the criteria to give a positive iodoform test.
3. Y is used to generate NaOI when reacted with NaOH. From the reaction context, Y is iodine (I₂), as the interaction of NaOH and I₂ forms NaOI (sodium hypoiodite).

Based on this analysis, the correct substances for A and Y are acetophenone and iodine.

Therefore, the correct option corresponds to the image with acetophenone as compound A and iodine as Y:

Thus, the correct answer is as indicated in the option with acetophenone and iodine.