Predict the product of the following reaction: $CH_2=CH-CH_2-CH_2-COOH \xrightarrow{Br_2, NaHCO_3} \text{Product}$

When a hydrocarbon $A$ undergoes complete combustion,it requires $11$ equivalents of oxygen and produces $4$ equivalents of water. What is the molecular formula of $A$?

If the mixture of the following four aromatic compounds is oxidized by a strong oxidizing agent,what is the product?

The product of the following hydrogenation reaction is:
$C_6H_6 + H_2 \xrightarrow{\text{Catalyst, High temperature and pressure}} ?$
Given: $1 \text{ eqv. of } C_6H_6$ and $1 \text{ eqv. of } H_2$.

If the heat of hydrogenation of $1$-butene is $30 \ kcal$,what is the heat of hydrogenation of $1,3$-butadiene (in $kcal$)?

Which of the following would not rearrange to a more stable form?