1. An organic compound (A) reduces Tollen’s reagent it must be an aldehyde. From the formula, it is identified as CH3 – CH2 – CHO propanal.
2. Propanal on reaction with methyl magnesium bromide followed by acid hydrolysis gives (B) as Butan – 2 – ol. It must be a secondary alcohol and gives blue colour with victor meyer’s test. H
4. Wolf – Kishner reduction.