Entrance Test Engineering / Medical- Chemistry paper5

Questions1. Which of the following is extracted by the electrometallurgical method? a)Cu b)Fe c)Na d)Ag2. Nickel is purified by thermal decomposition of its a)hydride b)chloride c)azide d)carbonyl3. In the extraction of iron, slag is produced. Slag is a)Co b)FeSiO3 c)MgSiO3 4. The process of zone refining is used in the purification of a)Si b)Al c)Ag d)Cu5. The most abundant metal on the surface of the earth is a)Fe b)Al c)Ca d)Hg6. Cupellation process is used in the metallurgy of a)Cu b)Ag c)Zn d)Al7. Which of the following is not employed for refining of metala)poling b)leaching c)electrolysis d)liquation8. Which of the following metals is obtained by leaching its ores with dilute cyanide solution? a)Silver b)Titanium c)Vanadium d)Zinc9. The main function of roasting is a)to remove the volatile matter b)to convert the ore into oxide c)both (a) and (b) d)to make slag10. In metallurgical processes, the flux used for removing acidic impurities is a)silica b)NaCl c)Lime Stone d)Sodium Carbonate11. Froth floatation is used for the concentration of a)oxide ores b)sulphide ores c)chloride ores d)amalgams12. Hybridisation of Fe in K3[Fe(CN)6] is a)sp3 b)dsp3 c)sp3d2 d)d2sp313. The type of isomerism present in nitropentaamminechromium (III)chloride is a)optical b)linkage c)ionisation d)polymerisation14. A square planar complex is formed by hybrisdisation of which atomic orbitals? a)s, px,py,dyz b)s, px,py,dx2−y2 c)s, px,py,dz2 d)s, px,py,dxy15. Both geometrical and optical isomerisms are shown by a)[Co(en)2Cl2]+ b)[Co(NH3)5Cl]2+ c)[Co(NH3)4Cl2]+ d)[Cr(ox)3]3−16. In [Cr(C2O4)3]3−,the isomerism shown is a)ligand b)optical c)geometrical d)ionisation17. The coordination number of Fe(II) in oxyhaemoglobin is a)6 b)4 c)8 d)1018. Which of the following is paramagnetic? a)[Fe(CN)6]4− b)[Ni(CO)4] c)[Ni(CN)4]2− d)[CoF6]3−19. CuSO4dissolves in NH3due to formation of a)Cu(OH)2 b)[Cu(NH3)4]SO4 c)[Cu(NH3)4(OH)2] d)CuO20. Which of the following compounds is not coloured?a)Na2[CuCl4] b)Na2[CdCl4] c)K4[Fe(CN)6] d)K3[Fe(CN)6]21. The unpaired electrons in Ni(CO)4are a)0 b)1 c)3 d)422. In the compound lithiumtetrahydridoaluminate, the ligand is a)A+ b)H c)H− d)none ofthese23. Which complex has square planar structure? a)Ni(CO)4 b)[NiCl4]2− c)[Ni(H2O)6]2+ d)[Cu(NH3)4]2+24. K4[Fe(CN)6] is called a) Potassium hexacyanoferrate(II) b)Potassium hexacyanoferrate(III) c) Potassium ferricyanide d)Prussian blue25. In which there is outer orbital hybridisation?a)[Zn(NH3)4]2+ b)[Co(NH3)6]3+ c)[Cr(NH3)6]3+ d)[V(NH3)6]3+26. Which of the following ligands is a bidentate? a)EDTA b)Ethylenediamine c)Acetate d)Pyridine27. Across the lanthanide series, the basicity of the lanthanide hydroxides a)increases b)decreases c)first increases and then decreases d)first decreases and then increases28. In Nessler's reagent, the ion present is a)HgI2− b)HgI42− c)Hg+ d)Hg2+29. Oxidation state of osmium in OsO4isa)+4 b)+6 c)+7 d)+830. A white solid halide of mercury forms a black mixture with NH4OH. The halide is a)HgCl2 b)HgI2 c)Hg2I2 d)Hg2Cl231. Mercury sticks to the surface of the glass when it comes in contact with a)Hg2O b)HNO3 c)O3 d)grease32. The starting material for the manufacture of KMnO4is a)pyrolusite b)mangatite c)magnatite d)Haematite33. Zn does not show variable valency because of a)complete 'd' subshell b)inert pair effect c)4s2subshell d)none of them34. Which one of the following ions has the lowest density? a)copper b)nickel c)scandium d)zinc35. Transition metals a)exhibit diamagnetism b)undergo inert pair effect c)do not form alloys d)show variable oxidation states36. The products of reaction of copper with dilute nitric acid are a)Cu(NO3)2+H2 b)Cu(NO3)2+H2O+NO c)Cu(NO3)2+H2O+NO2 d)CuNO3+H237. German silver does not containa)Cu b)Zn c)Ni d)Mn38. Which one of the following metal ions is colourless?a)V2+ b)Cr3+ c)Zn2+ d)Ti3+39. Which of the following ions will finally give a black precipitate with Ag+ion a)SO32− b)Br− c)CrO42− d)S2O32−40. Sodium thiosulphate is used in photography because of its a)oxidising behaviour b)reducing behaviour c)complexing behaviour d)photochemical behaviour41. Of the following which has the highest magnetic moment? a)V3+ b)Mn2+ c)Fe2+ d)Cu2+42. XeF4 on partial hydrolysis produces a)XeF2 b)XeOF2 c)XeOF4 d)XeO343. The coloured discharge tubes for advertisement mainly contain a)xenon b)helium c)neon d)argon44. In the clathrates of xenon with water, the nature of bonding between xenon and water is a)covalent b)hydrogen bonding c)co-ordinate d)dipole induced dipole interaction45. XeF2molecule is a)linear b)trigonal planar c)pyramidal d)square planar46. Which of the following Fluorides of Xenon is impossiblea)XeF2 b)XeF3 c)XeF4 d)XeF647. Which is the weakest acid a)HF b)HCl c)HBr d)HI48. The bleaching action of Chlorine is due to a)reduction b)hydrogenation c)chlorination d)oxidation49. Bleaching powder is obtained by the action of Chlorine gas and a)Dilute solution of Ca(OH)2 b)Concentrated solution of Ca(OH)2 c)Dry CaO d)Dry slaked lime50. Which of the following does not form its oxyacids? a)Fluorine b)Chlorine c)Bromine d)IodineANSWERS:CDDABBBACCBDBBABADBBACDADBBBDDCAACDBDCDCBBCDABADDA