With anhydrous zinc chloride,ethylene glycol gives:

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Cis form of alkene is found to be more polar than the trans form.
Reason $(R)$: Dipole moment of trans isomer of $2$-butene is zero.
In the light of the above statements,choose the correct answer from the options given below:

On vigorous oxidation by permanganate solution,$(CH_3)_2C = CH - CH_2CH_2CH_3$ gives:

What will be the product in the following reaction?
(Image of methylenecyclohexane reacting with $NBS$)

Cyclopentene on treatment with alkaline $KMnO_4$ gives

In the given reaction,only one alkene undergoes preferential oxidation by electrophilic ozone. Identify the product $(P)$ of the given reaction.