(A) Glycol reacts with HI to give ethylene.
(R ) Initially ethylene di-iodide is formed which being unstable loses a molecule of `I_(2)` and forms ethylee.

Assertion (A) : Anisole reacts with HI to give phenol and methyl iodide. Reason (R): The strong C-O bond in anisole does not cleave so methanol is never formed.

Ethylene glycol reacts with dimethyl terephthalate to form

Which of the following acids on heating loses a molecule of H_(2)O to form an alpha, beta -unsaturated acid?

Ethylene reacts with Br, to give 1,2-dibromoethane. The anti-addition takes place due to the formation of which intermediate ?