Question

1. A compound of molecular formula C5H10O forms a yellow precipitate with 2,4-dinitrophenylhydrazine reagent and a yellow precipitate with reagents for iodoform test. Draw the structural formula for this compound that fits the description. Explain your answer.

Answer 1

Explanation:

it's a ketone since it's positive with 2,4-DNP

and it's a methyl ketone since it's positive with iodoform test

thus the compound is 2-pentanone, i.e. the it's a linear molecule with which the oxygen is doubly bonded with the second carbon