Page 1 :
Test in d and f block elements, , 1.Which of the following are amphoteric oxides?, Mn.O;, CrOs, CriOs, CrO, V04, Vz0s, a) V2Os, Cr2O3 b) MnaQz, CrO3, ¢) CrO, V20s d) V204, V20s, , 2.Which of the following ions has the same number of unpaired electrons as present in, Vee?, , a) T3, b} Fes, c) Nie, d) Cr, , 3. For the four successive transition elements Cr, Mn, Fe, Co the stability of +2 oxidation, state will be in the following order, , a, Mn >Fe > Cr >Co b.Fe > Mn > Co >Cr, , c. Co >Mn > Fe > Cr d. Cr > Mn > Co > Fe, , 4.The pair having similar magnetic moment is, a) Ti*, Ve b) Cr+, Mn+, , c}) Mn2, Fe djFes, Mn?, , 5.The ability of d-block elements to form complexes is due, a.Small and highly charged ions, b. Vacant low energy orbitals to accept lone pair of electrons from ligands, e.Both correct, , d.Both wrong, , 6,Which of the following contains ionic bond character?, a. MnO b.MnQ. ec, CrOs® d, CreO7*, , 7.The electronic configuration of a transition element X in +3 oxidation state is, [Ar] 3d5.What is it’s atomic number?, , aj25 b)26 )27 d}24

Page 2 :
8.For the redox reaction, xMnOw +y HaCoO4+2H* — m Mn® +n COs + PH2O, The values of x,y,m,and z are, a,10,2,5,2 b. 2,5,2,10 ¢.6,4,2,5 d.3,5,2,10, , 9.KMnO, acts as an oxidizing agent in alkaline medium.When alkaline KMnO, is treated, with KI ,iodide ion is oxidised to, , a) lb b} 10- ¢) 10x d) 10+, , 10, Which of the following compounds is coloured?, a) NiCl b} Zn(NOs)2 c) TICly d) Cu2Ch, , 11.Which one of the following characteristics of the transition metals is associated with, higher catalytic activity?, , a) high enthalpy of atomization b) paramagnetic behaviour, , ¢} colour of hydrate ions d) variable oxidation states, 12.Magnetic moment of 2.87 is given by, , a) Cr2- b) Coz ce) Niz- d) Ti3+, , 13.The actinoids show more number of oxidation states than lanthanoids in general.This, is because, , a) the 5f orbitals extend further from the nucleus than 4f orbitals, b) the 5f orbitals are more buried than 4f orbitals, , ¢) there is a similarity between the 4f and 5f orbitals in their angular part of the wave, functions, , d) the actinoids are more reactive than the lanthanoids,, 14. Mark the correct statements among the following, 1) Manganese exhibits +7 oxidation state, 2)Scandium forms +4 oxidation state, 3)[CoFs}? is diamagnetic, 4) Zinc forms colourless ions, , a) land2 b) land 3 c) land 4 d) 2and3, , 15, Formation of interstitial compound makes the transition metal