1) The molecular formula of Wilkinson’s catalyst used in the hydrogenation of alkenes is A) $Co(CO)_{8}$ B) $(Ph_{3}P)_{3}RhCl$ C) $[Pt(NH_{3})_{2}Cl_{2}]$ D) $K[Ag(CN)_{2}]$ Answer: Option BExplanation:The molecular formula of Wilkinson's catalyst is $(Ph_{3}P)_{3}$ RhCl that is used in hydrogenation of alkenes. Its IUPAC name is chlorotris (triphenyl phosphine ) rhodium(l). This compound is square planar in nature