CHEMISTRY
1.Which of the following is extracted by the electrometallurgical method? a) Cu b) Fe c) Na d) Ag 2.Nickel is purified by thermal decomposition of its a) hydride b) chloridec) azide d) carbonyl
3.In the extraction of iron, slag is produced. Slag is a) Co b) FeSiO3c) MgSiO3 d)
4.The process of zone refining is used in the purification of a) Si b) Al c) Ag d) Cu
5.The most abundant metal on the surface of the earth is a) Fe b) Al c) Ca d) Hg
6.Cupellation process is used in the metallurgy of a) Cu b) Ag c) Zn d) Al
7.Which of the following is not employed for refining of metal a) poling b) leaching c) electrolysis d) liquation
8.Which of the following metals is obtained by leaching its ores with dilute cyanide solution? a) Silver b) Titanium c) Vanadium d) Zinc
9.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 slag
10.In metallurgical processes, the flux used for removing acidic impurities is a) silica b) NaCl c) Lime Stone d) Sodium Carbonate
11.Froth floatation is used for the concentration of
a) oxide ores b) sulphide ores c) chloride ores d) amalgams
12.Hybridisation of Fe in K3[Fe(CN)6] is a) sp3 b) dsp3 c) sp3d2 d) d2sp3
13.The type of isomerism present in nitropentaamminechromium (III)chloride is a) optical b) linkage c) ionisation d) polymerisation
14.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,dxy
15.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) ionisation
17.The coordination number of Fe(II) in oxyhaemoglobin is a) 6 b) 4 c) 8 d) 10
18.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]SO4c) [Cu(NH3)4(OH)2] d) CuO
20.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) 4
22.In the compound lithiumtetrahydridoaluminate, the ligand is a) A+ b) H c) H− d) none of these 23.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 blue
25.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) Acetated) Pyridine 27.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 increases
28.In Nessler's reagent, the ion present is a) HgI2− b) HgI42− c) Hg+ d) Hg2+
29.Oxidation state of osmium in OsO4is a) +4 b) +6 c) +7 d) +8
30.A white solid halide of mercury forms a black mixture with NH4OH. The halide is a) HgCl2 b) HgI2 c) Hg2I2 d) Hg2Cl2
31.Mercury sticks to the surface of the glass when it comes in contact with a) Hg2O b) HNO3 c) O3 d) grease
32.The starting material for the manufacture of KMnO4is a) pyrolusite b) mangatite c) magnatite d) Haematite
33.Zn does not show variable valency because of a) complete 'd' subshell b) inert pair effect c) 4s2subshell d) none of them
34.Which one of the following ions has the lowest density? a) copper b) nickel c) scandium d) zinc 35.Transition metals a) exhibit diamagnetism b) undergo inert pair effect c) do not form alloys d) show variable oxidation states
36.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+H2
37.German silver does not contain a) Cu b) Zn c) Ni d) Mn
38.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 behaviour
41.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) XeO3
43.The coloured discharge tubes for advertisement mainly contain a) xenon b) helium c) neon d) argon
44.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 interaction
45.XeF2molecule is a) linear b) trigonal planar c) pyramidal d) square planar
46.Which of the following Fluorides of Xenon is impossible a) XeF2 b) XeF3 c) XeF4 d) XeF6 47.Which is the weakest acid a) HF b) HCl c) HBr d) HI
48.The bleaching action of Chlorine is due to a) reduction b) hydrogenation c) chlorination d) oxidation
49.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 lime
50.Which of the following does not form its oxyacids?
a) Fluorine b) Chlorine c) Bromine d)
1.Which of the following is extracted by the electrometallurgical method? a) Cu b) Fe c) Na d) Ag 2.Nickel is purified by thermal decomposition of its a) hydride b) chloridec) azide d) carbonyl
3.In the extraction of iron, slag is produced. Slag is a) Co b) FeSiO3c) MgSiO3 d)
4.The process of zone refining is used in the purification of a) Si b) Al c) Ag d) Cu
5.The most abundant metal on the surface of the earth is a) Fe b) Al c) Ca d) Hg
6.Cupellation process is used in the metallurgy of a) Cu b) Ag c) Zn d) Al
7.Which of the following is not employed for refining of metal a) poling b) leaching c) electrolysis d) liquation
8.Which of the following metals is obtained by leaching its ores with dilute cyanide solution? a) Silver b) Titanium c) Vanadium d) Zinc
9.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 slag
10.In metallurgical processes, the flux used for removing acidic impurities is a) silica b) NaCl c) Lime Stone d) Sodium Carbonate
11.Froth floatation is used for the concentration of
a) oxide ores b) sulphide ores c) chloride ores d) amalgams
12.Hybridisation of Fe in K3[Fe(CN)6] is a) sp3 b) dsp3 c) sp3d2 d) d2sp3
13.The type of isomerism present in nitropentaamminechromium (III)chloride is a) optical b) linkage c) ionisation d) polymerisation
14.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,dxy
15.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) ionisation
17.The coordination number of Fe(II) in oxyhaemoglobin is a) 6 b) 4 c) 8 d) 10
18.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]SO4c) [Cu(NH3)4(OH)2] d) CuO
20.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) 4
22.In the compound lithiumtetrahydridoaluminate, the ligand is a) A+ b) H c) H− d) none of these 23.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 blue
25.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) Acetated) Pyridine 27.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 increases
28.In Nessler's reagent, the ion present is a) HgI2− b) HgI42− c) Hg+ d) Hg2+
29.Oxidation state of osmium in OsO4is a) +4 b) +6 c) +7 d) +8
30.A white solid halide of mercury forms a black mixture with NH4OH. The halide is a) HgCl2 b) HgI2 c) Hg2I2 d) Hg2Cl2
31.Mercury sticks to the surface of the glass when it comes in contact with a) Hg2O b) HNO3 c) O3 d) grease
32.The starting material for the manufacture of KMnO4is a) pyrolusite b) mangatite c) magnatite d) Haematite
33.Zn does not show variable valency because of a) complete 'd' subshell b) inert pair effect c) 4s2subshell d) none of them
34.Which one of the following ions has the lowest density? a) copper b) nickel c) scandium d) zinc 35.Transition metals a) exhibit diamagnetism b) undergo inert pair effect c) do not form alloys d) show variable oxidation states
36.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+H2
37.German silver does not contain a) Cu b) Zn c) Ni d) Mn
38.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 behaviour
41.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) XeO3
43.The coloured discharge tubes for advertisement mainly contain a) xenon b) helium c) neon d) argon
44.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 interaction
45.XeF2molecule is a) linear b) trigonal planar c) pyramidal d) square planar
46.Which of the following Fluorides of Xenon is impossible a) XeF2 b) XeF3 c) XeF4 d) XeF6 47.Which is the weakest acid a) HF b) HCl c) HBr d) HI
48.The bleaching action of Chlorine is due to a) reduction b) hydrogenation c) chlorination d) oxidation
49.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 lime
50.Which of the following does not form its oxyacids?
a) Fluorine b) Chlorine c) Bromine d)
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