The reaction of propene with diazomethane in the presence of $UV$ radiation yields ........................

Addition of $HBr$ to propene in the presence of a peroxide takes place contrary to Markovnikov rule. This can be explained by the mechanism involving

Which of the compounds with molecular formula $C_5H_{10}$ yields acetone on ozonolysis?

When ethene reacts with bromine,it forms

The product of acid catalyzed hydration of $2-$phenylpropene is

$(R)-3-$bromocyclopentene (shown below) reacts with $Br_2/CCl_4$ to form two products,$Y$ and $Z$. $Y$ is not optically active (does not rotate plane-polarized light). What is the structure of $Y$?