Draw the structure of semicarbazone of cyclopentanone.
OR
Draw the structure of product formed when propanal is treated with zinc amalgam and concentrated hydrochloric acid.
OR
When propanal is treated with zinc amalgam and concentrated hydrochloric acid, propane is obtained. This is Clemmonsen’s reduction.
CH3CH2CHO Zn-Hg/HCl→ CH3CH2CH3
(Propanal) (Propane)