The product of the following reaction is:
$CH_3-CH=CH-CH_3 \xrightarrow{MCPBA, CH_2Cl_2} \text{Product}$

$CH_2 = CH_2 \xrightarrow[KOH/H_2O]{KMnO_4} X = ......$

$CH_3-C(CH_3)_2-CH=CH_2 \xrightarrow[H_2O_2/OH^{-}]{B_2H_6/THF} (Z)$ Major product

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

Which of the following reagents is used to detect carbon-carbon multiple bonds?

Explain the oxidation of alkenes in different situations with examples.