How is heating of sugar and heating of ammonium chloride different from each other? Explain your answer.

(N/A) Heating of $NH_4Cl$ (ammonium chloride) and sugar are different processes because they involve different physical and chemical changes.
$1$. $NH_4Cl$ is a sublime substance. When heated,it undergoes sublimation,meaning it changes directly from a solid state to a gaseous state without passing through the liquid phase.
$2$. Sugar $(C_{12}H_{22}O_{11})$ is not a sublime substance. When heated,it undergoes a chemical change called dehydration and thermal decomposition,which results in charring (turning into black carbon residue) rather than sublimation.