The propene reacts with $HBr$ to form

In the reaction of hydrogen bromide with an alkene (in the absence of peroxides),the first step of the reaction is the ................. to the alkene.

What are the suitable conditions for the following transformation?

What is the major product of the following reaction?
$1\text{-methylcyclohexene} + Br_2 \xrightarrow{H_2O} ?$

The reaction of trans-but$-2-$ene with $Br_2$ in $CCl_4$ yields products. The number of stereoisomeric products $(X)$ formed is:

Reaction of ethanol with conc. sulphuric acid at $170^{\circ} C$ produces a gas which is then treated with bromine in carbon tetrachloride. The major product obtained in this reaction is