Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. $\text{HCl}$ is called:

1. Clemmensen reduction uses $\text{Zn(Hg)}$ and concentrated $\text{HCl}$ to reduce carbonyl groups ($>\text{C=O}$) to methylene groups ($-{\text{CH}}_2-$).2. Wolff-Kishner reduction uses hydrazine (${\text{NH}}_2{\text{NH}}_2$) and a strong base ($\text{KOH}$) in ethylene glycol to achieve the same transformation.