How many products will be formed in the reaction shown below?
$CH_3-CH_2-C(CH_3)=C(CH_3)-CH_2-CH_3 + HBr \xrightarrow{R_2O_2} \text{Products}$

Write about ozonolysis of alkene.

Assertion $(A)$: Propene on addition with hydrogen bromide in the presence of peroxide gives $1-$bromopropane as the major product.
Reason $(R)$: $1-$bromopropane is the major product because it is formed through the stable carbocation.
The correct answer is

When neopentyl alcohol is heated with an acid,it slowly converts into an $85:15$ mixture of alkenes $A$ and $B$,respectively. What are these alkenes $?$ (Note: $A$ is the major product and $B$ is the minor product.)

Reaction of $HBr$ with propene in the presence of peroxide gives

Which of the following intermediates is formed to produce the major product in the addition of $HBr$ to propene in the presence of peroxide?