BITSAT2018ChemistryHydrocarbonsActual
The correct sequence of reagents for the following conversion will be
Options
- AO 3 / Red   P ,   AlCl 3 ,     MeCOOH
- BH 2 SO 4 + HgSO 4 , H 2 O / Heat
- CO 3 / Zn - AcOH ,   H 2 SO 4 + HgSO 4 / H 2 O / Heat
- DCH 3 COOH ,   H 2 O 2 + OH / H 2 O
Correct answer
B. H 2 SO 4 + HgSO 4 , H 2 O / Heat
Step-by-step solution
R - C ≡ CH is converted to ketone by catalytic hydration with reagents. Hydration of alkynes is carried out in the presence of a warm 40% sulfuric acid in the presence of 1% mercuric sulfate. In this reaction, first a molecule of water is added to form enol which then tautomerizes to keto form.