Question

A compound $$(A)$$ called vanillin is isolated from vanilla seeds. Molecular formula of vanillin is $$C_{8}H_{8}O_{3}$$, Vanillin gives violet colour on treatment with neutral $$FeCI_{3}$$. It also gives a silver mirror with Tollens' reagent. Each mole of vanillin gives one mole of $$AgI$$ when subjected to Zeisel's active methoxy estimation.
$$Vanillin \xrightarrow {Conc. HBr} compound (B)$$;
Compound $$(B)$$ can also be obtained from catechol by Gattermann-Koch reaction.
Answer the following questions :
Structure of vanillin should be

Answer 1

Correct option is B.
Vanillin is an organic compound with the molecular formula $$C_8H_8O_3$$. It is a phenolic aldehyde. Its functional groups include aldehyde, hydroxyl, and ether.

Option B is correct.