Classify the following compounds into saturated,unsaturated,and aromatic hydrocarbons: Ethane,Ethene,Ethyne,Propene,Propane,Benzene,Toluene,Anthracene,Cyclopropane.

The product obtained by heating $(NH_4)_2SO_4$ and $KCNO$ is

Product $(C)$ is

The major products $A$ and $B$ in the following reactions are respectively:
i) Benzene $\xrightarrow{Cl_2/uv, 500K} A$
ii) $1-$Methylcyclohexene $\xrightarrow{HI} B$

How many $\sigma$ and $\pi$ bonds are present in the following?
$(a)$ $But-1-ene-3-yne$
$(b)$ $Buta-1,3-diene$
$(c)$ $CH_2=CH-C\equiv N$
$(d)$ $Propa-1,2-diene$
$(e)$ $1-butyne$ and $2-butane$

Give the uses of hydrocarbons with examples.