Observe the following given changes:
\[
\text{wood} \xrightarrow[\text{absence of air}]{\text{high temperature}} X
\text{coal} \xrightarrow[\text{absence of air}]{\text{high temperature}} Y
\]
X and Y respectively are:
Show Hint
Charcoal comes from wood, coke comes from coal — both by destructive distillation in the absence of air.