$trans$-cyclohexane-$1,2$-diol can be obtained by the reaction of cyclohexene with

What is the difference in reaction of alkene with $HBr$ in the presence of peroxide and in the absence of peroxide?

Which of the following alkenes is the most stable?

$CH_3-CH_2-CH_2-Br$ $\xrightarrow{\text{alk. KOH}} A$ $\xrightarrow[(ii) H_2O_2/OH^{-}]{(i) BD_3/THF} B$; $B$ is:

Identify the product formed when $cis-but-2-ene$ reacts with $Baeyer's$ reagent (cold,dilute alkaline $KMnO_4$ solution).

Identify the correct statements with respect to $cis/trans$-but$-2$-ene from the following:
$I$. $cis$-but$-2$-ene is more polar than $trans$-but$-2$-ene
$II$. Melting point of $cis$-but$-2$-ene is greater than that of $trans$-but$-2$-ene
$III$. Boiling point of $cis$-but$-2$-ene is greater than that of $trans$-but$-2$-ene
Correct answer is