D-F Block Elements Transition Elements MCQs – 2

1) German silver is an alloy of
a) Ag and Cu
b) Cu, Sn, Ag
c) Cu, Zn, Ni
d) Cu, Ni, Fe, Mn

2) Bronze, used for making statues, coins and utensils, is an alloy of
a) Cu, Zn

b) Cu, Zn, Sn
c) Cu, Sn
d) Cu, Ni

3) Gun metal contains
a) Cu = 80%, Zn = 20%
b) Cu = 60%, Ni = 40%
c) Cu = 80%, Zn = 10%, Sn = 10%
d) Cu = 90%, Sn = 10%

4) Boiling CuCI2 with excess of copper turnings and conc. HCI gives
a)
b)
c)
d)

5) Which of the following on treatment with water turns blue ?
a)
b)
c)
d)

6) Bordeaux mixture which is used as a fungicide in agriculture is
a)
b)
c)
d)

7) Copper sulphate pentahydrate on heating at 423K gives
a)
b)
c)
d)

8) Bell metal is an alloy of
a) Cu, Pb and Sn
b) Sn and Cu
c) Zn and Pb
d) Zn, Cu and Sn

9) Blue vitriol is
a)
b)
c)
d)

10) Which of the following is not an ore of silver ?
a) Silver glance
b) Horn silver
c) German silver
d) Pyrargyrite

11) Pyrargyrite, an ore of silver is
a)
b)
c) AgCI
d)

12) For making jewellery, Ag and Au are alloyed with
a) Cu
b) Zn
c) Sn
d) Ni

13) 925 Fine silver means
a) 9.5% Ag + 90.75%Cu
b) 92.5% Ag +7.5% Cu
c) 9.25% Cu + 90.75% Ag
d) 7.5% Ag + 92.5% Au.

14) Which of the following oxides is least stable at room temperature ?
a) CuO
b)
c) ZnO
d)

15) Choose the least soluble of the following .
a)

b) AgF
c) AgCI
d) AgBr

16) Which of the following does not dissolve in NH3 solution ?
a) AgF
b) AgCl
c) AgBr
d) Agl

17) Photographic film is coated with an emulsion of
a)

b) AgF
c) AgBr
d)

18) The developer used in photography is an alkaline solution of
a) Hydroquinone
b) Glycerol
c) Phenol
d) Picric acid

19) The black image on an exposed and developed photographic film is composed of
a) Ag
b) AgBr
c)
d)

20) The fixer used in photography is
a)
b)
c)
d)

21) The silver salt most commonly used in photography is
a) AgCI
b) AgBr
c) Agl
d) AgF

22) Which of the following metals have the highest thermal and electrical conductivity ?
a) Copper
b) Silver
c) Zinc
d) Aluminium

23) Which of the following is not an ore of gold ?
a) Calaverite
b) Sylvanite
c) Bismuthaurite
d) Zincite

24) In the case of gold
a) + 1 state is more stable

b) + 3 state is more stable
c) Both + 1 and + 3 states have equal stability
d) None of these

25) A@ AuCI3 is obtained
a) By treating Au with HCI

b)
c) By heating Au metal with HCI gas
d) None of these

26) AuCI3 on heating gives
a) AuCI + Au2Cl
b)
c)
d) AuCl + Cl2

27) The principal ore of zinc is
a) Zincite
b) White vitriol
c) Zinc blende
d) Calamine

28) Calamine, the ore of zinc is
a)
b) ZnO
c) ZnS
d)

29) Zinc metal is refined by
a) Fractional crystallization
b) Fractional distillation alone
c) Electrolysis alone
d) Both by (b) and (c)

30) Zinc metal is commercially obtained from zinc oxide by reduction with
a) Aluminium
b) Sodium
c) Carbon
d) Magnesium.

31) Zinc metal dissolves in cold concentrated solution of
a) NaCI
b)
c) NaOH
d)

32) Which of the following sulphides is soluble in dil. HCI?
a) HgS
b) ZnS
c) CuS
d) PbS

33) Zinc is resistant to atmospheric corrosion because its surface is covered with a thin layer of
a) ZnO
b)
c)
d)

34) The impurities present in crude zinc metal are
a) Cd, Pb, Fe
b) Co, Ni, Fe
c) Cd, Hg, Cu
d) Mn, Cu, Ni

35) Zinc dust is obtained by
a) Crushing zinc metal
b) Burning zinc metal in air
c) Melting zinc and then atomising it with a blast of air
d) Roasting zinc sulphide

36) Which of the following is a constituent of lithopone ?
a)
b) ZnS
c)
d) ZnO

37) Cinnabar is an ore of
a) Lead
b) Zinc
c) Silver
d) Mercury

38) Which of the following sulphides when heated strongly in air gives the corresponding metal ?
a)
b) CuS
c) HgS
d) FeS

39) Mercury is extracted from cinnabar by
a) Heating in air to 773-873 K followed by condensation of vapours
b) Leaching with conc. NaOH solution followed by precipitation with zinc dust
c) Heating in air to 773-873 K by reduction with coke
d) None of the above.

40) The impurities of lead, tin and zinc are removed from mercury by treating impure mercury with
a) Dil. NaOH
b) Dil. HCI
c)
d)

41) Mercury is best purified by
a) Distillation under reduced pressure
b) Liquation
c) Zone refining
d) Van Arkel method

42) Among the following metals, interatomic forces are probably weakest in
a) Cu
b) Ag
c) Zn
d) Hg

43) Yellow mercury (II) oxide is obtained when
a) Hg is heated in excess of air at 623 K
b)
c) HgS is roasted in air
d)

44) Red and yellow mercury (II) oxides differ from each other in
a) Chemical composition
b) Only in particle size
c) Only in colour
d) Both in colour and particle size

45) Which one of the following ions exists as a dimer ?
a)
b)
c)
d)

46) Calomel is
a)
b)
c)
d)

47) The salt of mercury which is used to prepare a standard electrode is
a) Mercuric nitrate

b) Mercuric chloride
c) Mercuric nitrate
d) Mercurous chloride

48) Which of the following reactions is reversible ?
a)
b)
c)
d)

49) Which of the following is not an amphoteric oxide ?
a) HgO
b)
c) ZnO
d)

50) Mercury (II) chloride is also called
a) Calomel

b) Corrosive sublimate
c)
d)

51) @ When NH4OH is added to Hg2CI2, the solid turns black due to the formation of
a)

b)
c) Finely divided Hg
d)

52) @ When stannous chloride solution is added to HgCI2, the white precipitate produced is due to the formation of
a)

b)
c)
d)

53) Nesslers reagent is an alkaline solution of
a)
b)
c)
d)

54) The brown precipitate formed when Nesslers reagent is treated with any ammonium salt is due to the formation of
a)
b)
c)
d)

55) Cassiterite, the ore of tin is
a) SnO
b) SnS
c)
d)

56) Tin dissolves in hot alkali solution due to the formation of
a)
b)
c)
d)

57) With hot concentrated nitric acid, tin gives
a)
b)
c)
d)

58) When alkali is added to an aqueous solution of a tin (II) salt, stannous hydroxide gets precipitated. On addition of more alkali, the precipitate dissolves due to the formation of
a)
b)
c)
d)

59) Tinning of the brass utensils is done in order to
a) Prevent corrosion
b) Check attack by acids
c) get better heat conduction
d) Beautify the utensil

60) Tin (IV) oxide is
a) Acidic
b) Basic
c) Neutral
d) Amphoteric

61) Which of the following sulphides is soluble in ammonium polysulphide or yellow ammonium sulphide ?
a) CuS
b) HgS
c) SnS
d) PbS

62) Stannic chloride is hydrolysed by water to give
a) SnO
b)
c)
d)

63) Anhydrous stannous chloride can be prepared by
a)
b) Heating stannous chloride dihydrate
c) Reducing stannic chloride with mercury
d) Heating tin in a current of HCI vapours

64) Solder metal is an alloy of
a) Pb + Sn
b) Pb + Sb
c) Cu + Sn
d) Cu + Zn

65) Which of the following is not an ore of lead ?
a) Galena
b) Anglesite
c) Cerussite
d) Cassiterite

66) The principal ore of lead is
a)
b) PbS
c)
d)

67) Which of the following sulphides when heated in air may give the corresponding sulphate ?
a) CuS
b) HgS
c) PbS
d) FeS

68) Plumbosolvency means dissolution of lead in
a) Ordinary water
b) Hot water
c) Acids
d) Alkalies

69) Plumbosolvency is represented by the reaction
a)
b)
c)
d)

70) Lead may be replaced from its salt solution by
a) Copper
b) Gold
c) Magnesium
d) Silver

71) Lead dioxide is obtained when
a) Lead is heated in air at 573 K
b) Lead nitrate is heated
c)
d) Litharge is heated in excess of air at 623 K

72) Which of the following lead compounds is most stable?
a)

b)
c)
d)

73) Which of the following has the maximum ionic character ?
a)
b)
c)
d)

74) Pewter which is used for making utensils is an alloy of
a) Pb and Sn
b) Pb, Sn and Sb
c) Cu and Sn
d) Cu and Zn

75) Which of the following is not covalent ?
a)
b)
c)
d)

76) Lead tetrachloride on hydrolysis gives
a) PbO
b)
c)
d)

77) Which of the following cannot be used for oxidation of conc. HCl to Cl2 gas ?
a)
b)
c) PbO
d)

78) Which one of the following is known as Lunar Caustic when it exists in the fused state ?
a) Silver nitrate

b) Silver sulphate
c) Silver chloride
d) Sodium sulphate

79) Which of the following ions is colourless ?
a)

b)
c)
d)

80) Ag can be obtained from AgCl by reacting with
a)

b)
c)
d)

81) H2S is passed through an acidified solution of Ag, Cu and Zn.Which forms a precipitate?
a)

b)
c)
d)

82) Which of the nitrates on heating strongly leaves the metal as the residue ?
a)
b)
c)
d)

83) What is the electronic configuration of Cu2+ (Z=29) ?
a)
b)
c)
d)

84) Which of the following is used in medicine ?
a)
b)
c)
d)

85) Aqueous solution of Cu (II) gives an intense blue coloured solution with ammonia which is due to
a)

b)
c)
d)

86) Gold is not used in
a)
b)
c)
d)

87) The metal halide which is insoluble in water is
a)

b)
c)
d)

88) AgF is soluble in water, while other silver halides are insoluble, because the
a) Hydration energy of AgF is greater than the lattice energy
b) Hydration energy of AgF is smaller than the lattice energy
c) Hydration energy is equal to the lattice energy of AgF
d) None

89) Which of the following metals will not react with a solution of ?
a) Fe
b) Zn
c) Mg
d) Hg

90) Which of the following does not react with AgCl ?
a)
b)
c)
d)

91) The geometry of the complex is
a) Square planar
b) Tetrahedral
c) Triangular bipyramid
d) Octahedral

92) An anion solution gives a white precipitate with solution. The precipitate dissolves in dilute ammonia due to the formation of
a)

b)
c)
d)

93) The important oxidation states of copper are
a) +2 and +1
b) +1 and +3
c) +3 and +4
d) +4 and +2

94) In solid , copper is co-ordinated to
a)

b)
c)
d)

95) The percentage of gold in Fools gold is
a)

b)
c)
d)

96) Which of the following is soluble in ammonia ?
a)
b)
c)
d)

97) Gold dissolves in aqua regia forming
a)

b)
c)
d)

98) 860 fine silver means
a)
b)
c)
d)

99) An alloy containing 80% Ag and 20% Cu is usually called
a) Sterling silver

b) Worm silver
c) Silver amalgam
d) Coinage silver

100) Which of the following is paramagnetic ?
a)
b)
c)
d) None


Answer

Ans 1) c

Ans Desc 1) German silver contains Cu = 60%, Zn = 20% and Ni = 20%.

Ans 2) b

Ans Desc 2) Bronze contains Cu = 80%, Zn = 10%, Sn = 10%.

Ans 3) d

Ans Desc 3) Gun metal contains Cu = 90%, Sn = 10%.

Ans 4) a

Ans Desc 4)

Ans 5) c

Ans Desc 5)

Ans 6) b

Ans Desc 6) CuS04 + CaO is called Bordeaux mixture.

Ans 7) b

Ans Desc 7)

Ans 8) b

Ans Desc 8) Bell metal contains Sn = 20%, Cu = 80%.

Ans 9) a

Ans Desc 9) CuSO4.5 H2O is called blue vitriol (Neela Tholha)

Ans 10) c

Ans Desc 10) German silver does not contain silver at all. It is an alloy of Cu (60%), Zn

(20%) and Ni(20%).

Ans 11) b

Ans Desc 11) Pyrargyrite (Ag2S.Sb2S3) is an ore of silver.

Ans 12) a

Ans Desc 12) Ag and Au are alloyed with Cu for making jewellery.

Ans 13) b

Ans Desc 13) 925 fine silver means 925 parts by weight of pure Ag present in an Ag-Cu

alloy of 1000 parts by weight.

Ans 14) b

Ans Desc 14) Hg2O decomposes only on heating while Ag2O

decomposes at room temperature. CuO and ZnO are, however, quite stable.

Ans 15) d

Ans Desc 15) The solubility of silver halides decreases with the increase in atomic number of the halogen.

Ans 16) d

Ans Desc 16) Agl is insoluble in NH3 solution.

Ans 17) c

Ans Desc 17) AgBr is sensitive to light.

Ans 18) a

Ans Desc 18) An alkaline solution of hydroquinone is used as a developer in photography which reduces some of the
exposed AgBr to black silver.

Ans 19) a

Ans Desc 19)

Ans 20) a

Ans Desc 20) Hypo or Na2S2O3 solution is used as fixer in photography which removes the unchanged AgBr as a complex ion.
AgBr + 2 Na2S2O3 Na3 [Ag (S2O3)2] +NaBr
Hypo Soluble

Ans 21) b

Ans Desc 21) AgBr is sensitive to light.

Ans 22) b

Ans Desc 22) Among metals Ag has the highest thermal and electrical conductivity.

Ans 23) d

Ans Desc 23) Zincite is ZnO which is an ore of zinc.

Ans 24) a

Ans Desc 24) + 1 state of gold is more stable than + 3 state.

Ans 25) b

Ans Desc 25)

Ans 26) d

Ans Desc 26)

Ans 27) c

Ans Desc 27) Zinc blende (ZnS) is the principal ore of zinc

Ans 28) a

Ans Desc 28)

Ans 29) d

Ans Desc 29) Zinc metal is refined by fractional distillation as it has low boiling point and also by electrolysis as it is a volatile metal.

Ans 30) c

Ans Desc 30)

Ans 31) c

Ans Desc 31) Zn + 2 NaOH + 2H2O Na2[Zn (OH)4]+H2.
                                                      Soluble

Ans 32) b

Ans Desc 32) ZnS + 2 HCl ZnCl2 +

Ans 33) d

Ans Desc 33) A thin layer of basic zinc carbonate ZnCO3.3 Zn (OH)2 is formed at the surface of zinc metal.

Ans 34) a

Ans Desc 34)

Ans 35) c

Ans Desc 35) Zinc dust is obtained by melting zinc and then atomising it with a blast of air.

Ans 36) b

Ans Desc 36) Lithopone, a white pigment is a mixture of ZnS and BaSO4.

Ans 37) d

Ans Desc 37) Cinnabar(Hgs) is an ore of Hg

Ans 38) c

Ans Desc 38)

Ans 39) a

Ans Desc 39)

Ans 40) d

Ans Desc 40) Pb, Sn and Zn form their respective nitrates which pass into the solution leaving behind pure Hg

Ans 41) a

Ans Desc 41) Hg is best purified by distillation under reduced pressure.

Ans 42) d

Ans Desc 42) Out of the mentioned elements, interatomic forces are weakest in Hg and hence it is liquid at room temperature.

Ans 43) b

Ans Desc 43)

Ans 44) d

Ans Desc 44) Red and yellow forms of HgO differ from each other in colour and particle size.

Ans 45) a

Ans Desc 45) Mercurous ion exists as dimer.

Ans 46) b

Ans Desc 46) Mercurous chloride (Hg2CI2) is called calomel.

Ans 47) d

Ans Desc 47) Mercurous chloride (Hg2CI2) is used to prepare standard calomel electrode.

Ans 48) a

Ans Desc 48)

Ans 49) a

Ans Desc 49) HgO is a basic oxide. All other oxides are amphoteric.

Ans 50) b

Ans Desc 50) HgCI2 is also called corrosive sublimate

Ans 51) c

Ans Desc 51)

Ans 52) a

Ans Desc 52)

Ans 53) c

Ans Desc 53) An alkaline solution of is called Nesslers reagent.

Ans 54) b

Ans Desc 54) 2 K2 [Hgl4] + NH3 + 3 KOH NH2.HgO.Hgl + 7 Kl + 2 H20
                                                              Iodide of Millons base
                                                                    (Brown ppt.) 

Ans 55) c

Ans Desc 55) Cassiterite is SnO2 (tin stone).

Ans 56) c

Ans Desc 56)

Ans 57) c

Ans Desc 57) Sn+4 HNO3 H2SnO3+4 NO2+H2O.

Ans 58) c

Ans Desc 58) SnCI2 + 2NaOH Sn (OH)2 + 2 NaCI

                                                   White ppt.

                                             Sn (OH)2+2 NaOH Na2SnO2 +2 H2O

                                                                                Sod. stannite (soluble)

Ans 59) a

Ans Desc 59) Tinning prevents brass utensils from corrosion.

Ans 60) d

Ans Desc 60) SnO2 is amphoteric

                              Heat
SnO2 + 2 H2SO4 Sn (SO4)2 + 2 H2O
   SnO2 + 2 NaOH Na2SnO3 + H2O.

Ans 61) c

Ans Desc 61) SnS + (NH4)2S + S (NH4)2SnS3
                                          
       Amm. Thiostannate
                                                     (soluble)

Ans 62) b

Ans Desc 62) SnCI4 + 2 H2O SnO2 + 4 HCI.

Ans 63) d

Ans Desc 63) Sn + 2 HCI SnCI2 + H2.
                 vapours

Ans 64) a

Ans Desc 64) Solder is an alloy of Pb (50%) + Sn (50%).

Ans 65) d

Ans Desc 65) Cassiterite is Sn02 (tin stone), an ore of tin.

Ans 66) b

Ans Desc 66) The principal ore of lead is PbS (galena).

Ans 67) c

Ans Desc 67) 3 PbS + 5 O2 2 PbO + PbSO4 + 2 SO2

Ans 68) a

Ans Desc 68) Plumbosolvency is dissolution of Pb as Pb (OH)2 in ordinary water which contains dissolved oxygen
2 Pb+2 H2O+O2
(soluble).

Ans 69) c

Ans Desc 69)

Ans 70) c

Ans Desc 70) Only Mg is more electropositive than Pb.

Ans 71) c

Ans Desc 71) +4 HNO3 2 Pb (N03)2+PbO2+2 H2O.

Ans 72) b

Ans Desc 72) Fluorine is the strongest oxidising agent which oxidises Pb to Pb4+.

Ans 73) a

Ans Desc 73) Ionic character decreases as the atomic number of halogens in PbX2 increases and electronegativity decreases.

Ans 74) a

Ans Desc 74) Pewter is an alloy of Pb (20%) and Sn (80%).

Ans 75) d

Ans Desc 75) PbF4 is ionic, all other compounds are covalent.

Ans 76) b

Ans Desc 76) PbCI4 + 2 H2O PbO2 + 4 HCI

Ans 77) c

Ans Desc 77) PbO is a weaker oxidizing agent and cannot oxidize Cl to Cl2.

Ans 78) a

Ans Desc 78) AgNO3 is used as lunar caustic in surgery.

Ans 79) a

Ans Desc 79) Cu+ is diamagnetic and has no unpaired electrons.

Ans 80) c

Ans Desc 80)

Ans 81) c

Ans Desc 81) Only Cu will be precipitated in acidified solution, because Cu is present in the IInd group of qualitative analysis.

Ans 82) a

Ans Desc 82)

Ans 83) d

Ans Desc 83) Cu has the electronic configuration . But when it loses to become
its electronic configuration becomes .

Ans 84) a

Ans Desc 84) is used as lunar caustic in surgery.

Ans 85) c

Ans Desc 85)

Ans 86) b

Ans Desc 86) Gold is not used in dyeing

Ans 87) a

Ans Desc 87) AgI is insoluble because the lattice energy is greater than the hydration energy.

Ans 88) a

Ans Desc 88) Hydration energy of AgF is greater than lattice energy because of small size of ion.
In the case of other halides, the lattice energy is greater than hydration energy.

Ans 89) d

Ans Desc 89) Copper displaces less electropositive metals such as Hg, Au, Ag etc. from their salt solutions. Because Hg is less electropositive than Cu, it will not react with CuSO4.

Ans 90) c

Ans Desc 90) Because AgCl is insoluble in water

Ans 91) a

Ans Desc 91) Square planar due to (hybridisation).

Ans 92) c

Ans Desc 92) is formed.

Ans 93) a

Ans Desc 93) The important oxidation state of Cu is +2.

Ans 94) b

Ans Desc 94) In molecules are joined by co-ordinate bonds and one molecule of water is joined by a hydrogen bond with ion.

Ans 95) a

Ans Desc 95) Fools gold is

Ans 96) b

Ans Desc 96)

Ans 97) b

Ans Desc 97) 

Ans 98) a

Ans Desc 98) Fineness of silver means part of silver in 100 parts of Ag-Cu alloy.
860 fine silver means that Ag-Cu alloy contains 860 parts of
Ag + 140 parts of Cu (86% Ag + 14% Cu).

Ans 99) a

Ans Desc 99) Sterling silver used in jewellery is generally made from 80% Ag and 20% Cu.

Ans 100) a

Ans Desc 100) is paramagnetic because the oxidation state of Cu in it is +2. has one unpaired electron.

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