What is the common name of ethanoic acid?

In the presence of which enzyme does the fermentation of glucose or fructose occur to produce ethanol and carbon dioxide?

$A$ gas is evolved when ethanol reacts with sodium. Name the gas evolved and also write the balanced chemical equation of the reaction involved.

Which of the following is the use of acetic acid?

An organic compound $A$ on heating with concentrated $H_2SO_4$ forms a compound $B$, which on addition of one mole of hydrogen in the presence of $Ni$ forms a compound $C$. One mole of compound $C$ on combustion forms two moles of $CO_2$ and $3$ moles of $H_2O$. Identify the compounds $A$, $B$, and $C$ and write the chemical equations of the reactions involved.

What is used to preserve the dead bodies of animals?