Q 1.d and f-block elements form complexes because they have :
(a) vacant d-orbitals(b) small sizes
(c) higher nuclear charge(d) all of the above
Q 2.Among the following compounds, which is thermally the most stable ?
(a) FeO(b) Fe2O3(d) Fe3O4(c) FeCO3
Q 3.Select the compounds/atoms where the oxidation number of the metals is zero?
(a) Co(b) Ni(CO)4(c) Fe(CO)9(d) All of these
Q 4.Vanadyl ion is:
(a) VO2+(b) (c) V2O+(d)
Q 5.Potassium ferrocyanide is not used to detect:
(a) Cu2+(b) Cd2+(c) Zn2+(d) Fe3+
Q 6.Ferrous and ferric salts can be best distinguished from each other by using the reagent :
(a) Fe(SCN)3(b) NH3CNO(c) K4[Fe(CN)6](d) dilute HNO3
Q 7.TiCl3 on heating gives:
(a) Ti(b) TiCl2(c) TiCl4(d) dilute HNO3
Q 8.The metals which are much more noble than Au and Pt and are insoluble in aquaregia:
(a) O3(b) Ir(c) Cs(d) Pd
Q 9.AgCl dissolved in an excess of solution NH3, KCN and Na2S2O3 produces complex ions. They are, respectively:
(a) [Ag(NH3)2]+, [Ag(CN)2]- and [Ag(S2O3)2]3-
(b) [Ag(NH2)2]2+, [Ag(CN)2]3- and [Ag4(S2O3)5]2-
(c) [Ag(NH3)2]2+, [Ag(CN)2]3- and [Ag2(S2O3)2]2-
(d) [Ag(NH3)4]+, [Ag(CN)4]3- and [Ag2(S2O3)2]2-
Q 10.Which is not the catalyst of H manufactured by contact process ?
(a) Oxides of nitrogen (b) V2O5
(c) Fe2O3(d) Platinised asbestos
Q 11.On strong heating, which of the following produces a mixture of SO2 and SO3 ?
(a) Fe2 (SO4)3, 9H2O(b) (NH4)2SO4.Fe2(SO4)3. 24H2O
(c) FeSO4. 7H2O(d) FeS2
Q 12.Which of the following compounds have the oxidation number of the metals as +1?
(a) [Fe(H2O)5(NO)2] SO4(b) CuSCN
(c) K4[Cu(CN)4](d) CuO
Q 13.“925 fIne silver” means an alloy of:
(a) 7.5% Ag and 92.5% Cu (b) 92.5% Ag and 7.5% Cu
(c) 80% Ag and 20% Cu(d) 90% Ag and 10% Cu
Q 14.Normally FeCl3 6H2O consists of :
(a) trans- [Fe(H2O)2Cl2].Cl. 4H2O (b) trans- [Fe(H2O)6Cl].Cl2
(c) trans- [Fe(H2O)4 Cl2].Cl. 2H2O (d) trans- [Fe(H2O)3 Cl2].Cl. 3H2O
Q 15.Which one of the following is not soluble in excess of NaOH ?
(a) Al(OH)3(b) Zn(OH)2(c) Fe(OH)3(d) All of these
Q 16.Among the following :
(a) Cd(b) Zn(c) Na(d) Fe
does not form amalgams.
Q 17.Which of the following pairs of ions can be separated by H2S in dilute HCl ?
(a) Bi3+, Sn2+(b) Cu2+, Cd2+(c) Zn2+, Cu2+(d) None of these
Q 18.ZnSO4 is boiled with Na2CO3 to produce :
(a) ZnCO. Zn(OH)2(b) ZnCO3(c) ZnCO3.ZnSO4(d) ZnCO3. Na2SO4
Q 19.Colour of transition metal ions are due to:
(a) d-d transition(b) charge transfer
(c) incompletely filled d-orbitals(d) all of the above
Q 20.Zinc oxide is normally white but turns yellow on heating and becomes white again on cooling because of:
(a) d—d transition spectra as well as a crystal defect
(b) the two-dimensional network structure of ZnO
(c) its high transition temperature (Tc)
(d) various types of lattice defects because of which the oxygen ion is lost during heating
Q 21.Among Sc (III), Ti (IV), Pd (II) and Cu (II) Ions:
(a) all are paramagnetic
(b) all are dimagnetic
(c) Sc (III), Ti (IV) are paramagnetic and Pd (II), Cu (III) are diamagnetic
(d) Sc (III), Ti (IV) are diamagnetic and Pd (II), Cu (III) are paramagnetic
Q 22.The separation of lanthanides by ion exchange method is based on:
(a) size of the ions (b) oxidation state of the ions
(c) the solubility of their nitrates(d) basicitiy of hydroxides of lanthanides
Q 23.All mercurous compounds are:
(a) diamagnetic in the solid state as well as in solution
(b) paramagnetic in the solid state as well as in solution
(c) diamagnetic in the solid state and paramagnetic in solution
(d) paramagnetic in the solid state and diamagnetic in solution
Q 24.Mn2O7 dissolves in water to give an acid. The colour of the acid is:
(a) green(b) blue(c) violet(d) red
Q 25.Choose the incorrect statement:
(a) silver is obtained as a byproduct in the extraction of copper, lead and zinc
(b) silver is obtained from the anode slime formed In the electrolytic refining of copper and zinc
(c) zinc is used to extract silver by solvent extraction from molten lead in Pane’s process
(d) all are correct
Q 26.For the same transition metal ion, the colour of its compounds will depend upon:
(a) temperature of the reaction
(b) pressure of the reaction
(c) nature of ligands or Lewis bases attached to the metal ion
(d) concentration of the ligands
Q 27.Til4 on heating gives :
(a) Til2 + l2(b) Ti + 2l2(c) Til3 + l2(d) none of the above
Q 28.The purest zinc is made by :
(a) Mond’s process(b) zone refining
(c) the van Arkel method(d) poling
Q 29.TiCl4 fumes strongly in moist air and is hydrolysed to give
(a) Ti(b) TiOCl2(c) TiO2(d) Ti(OH)4
Q 30.Choose the incorrect statements. Transition metals are that they:
(a) form complexes(b) show variable oxidation states
(c) show magnetic properties(d) do not form coloured compounds
Q 31.Which among the following metals does not dissolve in aqua-regia ?
(a) Pt(b) Pd (c) Au(d) Ir
Q 32.Which of the following are correctly matched ?
(a) Brass Cu, Sn(b) Nickel silver Cu, Ni, Zn
(c) Phopphor bronze Cu, Sn, P, Zn(d) Fool’s gold CuS2
Q 33.Which of the following forms stable dinuclearions ?
(a) Zn(b) Cd(c) Hg(d) Fe
Q 34.Choose the incorrect statement when a mixture of NaCl and K2Cr2O7 is gently warmed with conc. H2SO4. ?
(a) A deep red vapour is evolved
(b) The vapour when passed into NaOH solution gives a yellow solution of Na2CrO4
(c) Chlorine gas is evolved
(d) Chromyl chloride is formed
Q 35.Galvanized iron pipes are made by ‘hot dipping’ :
(a) zinc in molten iron(b) iron in molten nickel
(c) iron in molten zinc(d) iron in molten magnesium
Answers
1. / d / 2. / b / 3. / d / 4. / a / 5. / b / 6. / c / 7. / d8. / b / 9. / a / 10. / a / 11. / c / 12. / b / 13. / b / 14. / c
15. / c / 16. / d / 17. / c / 18. / a / 19. / d / 20. / d / 21 / d
22. / a / 23. / a / 24. / c / 25. / b / 26. / a / 27. / b / 28 / b
29. / d / 30. / d / 31. / d / 32. / b / 33. / c / 34. / c / 35. / c