What are biochemical catalysts called?

Write the molecular formula of an alcohol that can be derived from butane.

Which of the following is the use of propanone?

Mention four characteristics which change with increasing molecular mass in a homologous series.

The general formula of three compounds $A, B$ and $C$ is $C_{n}H_{2n}$. $B$ has the highest boiling point and $C$ has the lowest boiling point.
$(i)$ Mention the type of compound $A, B$ and $C$.
$(ii)$ Which of these has the minimum number of carbon atoms?
$(iii)$ Name the homologous series to which $A, B$ and $C$ belong.

Select alkenes and alkynes from the following:
$C_{2}H_{4}, C_{3}H_{4}, C_{2}H_{2}, C_{4}H_{8}$