A chiral compound with an 'X' group attached to the stereocenter has been replaced by a 'Y' group. The product obtained rotates the plane of polarised light in the direction opposite to that of the original compound. Name the process that has taken place.

MCQs on haloalkanes classification and nomenclature, c-x bond nature, polyhalogen compounds, haloalkanes methods, haloarenes preparation, physical properties and chemical reactions.