The reaction of cyclopentene with alkaline $KMnO_4$ yields ................

Reaction of $Br_2$ on ethylene in the presence of $NaCl$ gives:

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.)

The addition of $HI$ to the double bond of propene yields isopropyl iodide and not $n$-propyl iodide because the addition proceeds through the formation of:

Describe the structure of the carbon-carbon double bond in alkenes.

Which one of the following alkenes when treated with $HCl$ yields majorly an anti-Markovnikov product?