(15)The complex [RhCI(PPh3)3]: A)is an active catalyst B)is tetrahedral C)can be reduced to give Rh(I)complexes D)shows one signal in its solution 31P NMR spectrum (16)The Y3 ion is: A)hard,and favours ligands with N-and/or O-donor atoms B)hard,and favours ligands with S-and/or P-donor atoms C)soft,and favours ligands with S-and/or P-donor atoms D)soft,and favours ligands with N-and/or O-donor atoms (17)Which of the following is the most appropriate description of a compound formulated as PtBra(NH3)2? A)It is a platinum(III)complex B)It is better formulated as [PtBr2(NH3)2][PtBra(NH3)2 C)It contains platinum()and platinum(I)centres D)It contains bromo-bridged chains of platinum(IV)and platinum(II)centres (18)To which point group does the [Hg2]2+ion belong? A)Dch B)Cv c)Ci D)C, (19)[NH4]2Ru(SO4)2.6H2O is an example of: A)an alum containing Ru(I⑩） B)an alum containing [Ru(OH2) C)a Tutton salt containing [Ru(OH2)(15) The complex [RhCl(PPh3)3]: A) is an active catalyst B) is tetrahedral C) can be reduced to give Rh(I) complexes D) shows one signal in its solution 31P NMR spectrum (16) The Y3+ ion is: A) hard, and favours ligands with N- and/or O-donor atoms B) hard, and favours ligands with S- and/or P-donor atoms C) soft, and favours ligands with S- and/or P-donor atoms D) soft, and favours ligands with N- and/or O-donor atoms (17) Which of the following is the most appropriate description of a compound formulated as PtBr3(NH3)2? A) It is a platinum(III) complex B) It is better formulated as [PtBr2(NH3)2] 2+[PtBr4(NH3)2] 2- C) It contains platinum(I) and platinum(II) centres D) It contains bromo-bridged chains of platinum(IV) and platinum(II) centres (18) To which point group does the [Hg2]2+ ion belong? A) D∞h B) C∞v C) Ci D) Cs (19) [NH4]2Ru(SO4)2.6H2O is an example of: A) an alum containing Ru(III) B) an alum containing [Ru(OH2)6] 2+ C) a Tutton salt containing [Ru(OH2)6] 2+ 10