Tiêu đề DPP-9 SOLUTION.pdf ✅

CLASS : XIth SUBJECT : CHEMISTRY DATE : DPP No. : 9 1 (d) Most of the transition metal cations are coloured. 2 (a) Ag(CN)― 2 does not contain unpaired electrons. 3 (d) It is a fact. 4 (d) In MnSO4 .4H2O, Mn is present as Mn2+ Mn2+ = 3d 5 4s 0 ↿ ↿ ↿ ↿ ↿ (Unpaired electrons =5) In CuSO4.5H2O, Cu is present as Cu2+ Cu2+ = 3d 9 4s 0 ⥮ ⥮ ⥮ ⥮ ↿ (Unpaired electrons =1) In FeSO4.6H2O,Fe is present as Fe2+ Fe2+ = 3d 6 4s 0 ⥮ ↿ ↿ ↿ ↿ (Unpaired electrons =4) In NiSO4.6H2O Ni is present as Ni2+ Ni2+ = 3d 8 4s 0 ⥮ ⥮ ⥮ ↿ ↿ (Unpaired electrons =2) Since, paramagnetic character ∝ unpaired electrons . Thus, CuSO4.5H2O has the lowest degree of paramagnetism among the given at 298 K. 5 (a) HgS is insoluble in hot dil.HNO3. 6 (c) A number of molybdic acids are known H2MoO4,H6Mo7O24. 7 (a) Topic :- THE D-AND F-BLOCK ELEMENTS Solutions