D-F Block Elements Transition Elements MCQs – 4

1) Transition metals usually exhibit highest oxidation states in their
a) Chlorides
b) Fluorides
c) Bromides
d) Iodides

2) The element with the electronic configuration 1s22s22p63s23p63d104s1 is
a) Fe
b) Co
c) Ni
d) Cu

3) Which of the following substances has the least ionic character ?
a)
b)
c)
d)

4) In the standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is
a) (Molecular weight)/2
b) (Molecular weight)/6
c) (Molecular weight)/3
d) Same as molecular weight

5) Which are ferrous metals ?
a) Fe, Co, Ni
b) Ru, Rh, Pd
c) Os, Ir, Pt
d) Cr, Mn, Cu

6) TiCI4 fumes strongly in moist air and is hydrolysed to give
a) Ti
b)
c)
d)

7) Which of the following is explosively unstable ?
a)
b)
c)
d) MnO

8) Chloroplatinic acid is
a) Monobasic
b) Dibasic
c) Tribasic
d) Tetrabasic

9) Identify the wrong statement regarding copper sulphate
a)
b)
c)
d) It gives CuO on strong heating in air

10) Monel metal is an alloy of
a) Cu + Zn + Ni
b) Cu + Ni + Fe
c) Cu + Sn + Pb
d) Cu + Ni + Al

11) Which is used as a fungicide ?
a)
b) CuO and quick lime
c)
d)

12) Out of Fe2+, Fe3+,Mn2+ and Ti2+, the one with the smallest size is
a)
b)
c)
d)

13) The best antidote for HgCI2 is
a) The white of an egg
b) Oranges
c) Epsom salt
d) None of these

14) For the same transition metal ion, the colour of its compounds will depend upon the
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

15) Transition elements are less reactive because of their
a) High ionisation energy
b) High heat of vapourisation
c) Lower heat of hydration of ions
d) All are correct

16) The magnetic moment of a transition metal ion is found to be 5.92 BM. The number of unpaired electrons present in it is
a) 2
b) 3
c) 4
d) 5

17) The equivalent weight of MnSO4 is equal to its molecular weight when it is converted to
a)
b)
c)
d)

18) @ The strength as oxidising agents of the following species in acidic solution decreases in the order
a)
b)
c)
d) None of these

19) The sulphide which is not soluble in hot dilute HNO3 is
a) HgS
b) PbS
c) CuS
d) CdS

20) Which of the following forms stable dinuclear ions ?
a) Zn
b) Cd
c) Hg
d) Fe

21) Which among the following metals does not dissolve in aqua regia ?
a) Pt
b) Pd
c) Au
d) Ir

22) TiCI3 on heating gives
a) Ti
b)
c)
d)

23) Hard steel contains
a) No carbon
b) 0.6-1.5% carbon
c) 5% carbon
d) 0.5-0.2% carbon

24) Tin (II) chloride is used
a) As a mordant in dyeing
b) As a reducing agent
c) In the preparation of colloidal gold
d) All the above

25) SnCI4 is
a) Tetrahedral in shape
b) A covalent compound
c) A volatile liquid
d) All the above

26) The basis for Al as a reducing agent in the thermite process is
a)
b) High Eox. Pot. of Al
c)
d) High I.E. of Al

27) Which of the following will not rapidly attack and destroy a pure aluminium can ?
a) NaOH solution
b)
c)
d) Conc. HCl

28) Which of the following properties of Al are not typical of most other metals ?
a) Considerable temperature difference between M.P. and B.P.
b) Negative standard electrode potential
c) Electrical resistance increases with increase in temperature
d) Forms salts with alkalies

29) Alum is
a)
b)
c)
d)

30) Common alum is
a)
b)
c)
d)

31) Alum is used by dyers of cloth
a) As first aid for cuts
b) For softening hard water
c) As mordant
d) For fire proofing fabrics

32) Aluminium metal is corroded in coastal places near to the sea, because the protective oxide film
a) Is removed by sea water
b) Reacts with sea water
c) Is attacked by salt present in sea water
d) Reacts with sand particles

33) Al(OH)3 is soluble in NaOH solution due to the formation of
a) Sodium aluminium hydroxide
b) Sodium meta aluminate
c) Aluminium peroxide
d) Aluminium oxide

34) Which of the following oxides is more stable than the others ?
a)
b)
c)
d)

35) A silvery white metal is solid on cold days but liquefies on a hot day and reacts with dilute HCI to give H2. It could be
a) Sn
b) Sb
c) Bi
d) Ga

36) Which of the following is amphoteric ?
a)
b)
c)
d)

37) Conc. HNO3 is stored in a container of
a) Cu
b) Al
c) Zn
d) Sn

38) Eka aluminium is
a) Gallium
b) Germanium
c) Indium
d) Scandium

39) Al and Ga have the same covalent radius because of the
a) Greater shielding power of the s-electrons of the Ga atom
b) Poor shielding power of the s-electrons of the Ga atom
c) Poor shielding power of the d-electrons of the Ga atom
d) Greater shielding power of the d-electrons of the Ga atom

40) Which of the following statements is false ?
a) Al compounds are ionic
b) Al is a light metal of great tensile strength
c) Al is a powerful reducing agent
d) Al does not react with steam even at high temperature

41) Which is correct in the case of anhydrous aluminium chloride ?
a)
b) It is not easily hydrolysed
c)
d) It is a strong Lewis base

42) Alumina
a) Is a good conductor of electricity
b) Is a bad conductor of electricity
c)
d) Is an electrovalent compound

43) Next to diamond, the hardest substance is
a) AIN
b)
c) BN
d)

44) RRR If a person is injured by the shot of a gun and all the pellets could not be removed, it may cause poisoning by
a) Hg
b) Pb
c) Fe
d) As

45) The correct composition of Mohr salt is
a)
b)
c)
d)

46) Mohr salt on oxidation with conc. HNO3 gives
a) Potash alum
b) Chrome alum
c) Ferric alum
d) None of these

47) In the volumetric analysis, Mohr salt is preferred to ferrous sulphate because
a)
b)
c) it can undergo both oxidation and reduction
d)

48) Mohr salt is prepared from an equimolar solution of
a) Green vitriol and potassium sulphate
b) Green vitriol and ammonium sulphate
c) Blue vitriol and potassium sulphate
d) Blue vitriol and ammonium sulphate

49) The formula of malachite is
a)
b)
c)
d)

50) The formula of azurite is
a)
b)
c)
d)

51) Malachite and azurite are used respectively as
a) Blue and green pigments
b) Green and blue pigments
c) Red and green pigments
d) Green and red pigments

52) Lunar caustic is
a) NaOH
b) KOH
c)
d)

53) Silver nitrate is also called
a) Silver glance
b) Horn silver
c) Lunar caustic
d) Ruby silver

54) When AgNO3 comes in contact with skin, it leaves a black stain. This is because of
a)
b)
c) Its reduction to silver
d) Its oxidation to silver oxide

55) AgNO3 solution is kept in coloured bottles in the laboratory. This is done
a) Because colours in glass act as negative catalysts
b) To cut off the entry of light
c) Simply to give it a distinction from other reagent bottles as it is costly
d)

56) The soluble complex formed on adding NH4OH to AgNO3 solution is
a)
b)
c)
d)

57) Which of the following chemicals is used as an eye drop in trachoma?
a)
b)
c)
d)

58) The chemist who has helped in the discovery of the maximum number of transuranic elements in the last two decades is
a) Sir Robert Robinson
b) Sir J.J. Thomson
c) Prof. G.T. Seaberg
d) Sir C.N. Hinshelwood

59) Which of the following metal oxides is white in colour but becomes yellow on heating?
a)
b) ZnO
c) FeO
d) MgO

60) Lanthanide contraction implies a
a) Decrease in density
b) Decrease in mass
c) Decrease in ionic radii
d) Decrease in radioactivity

61) Which of the following pairs of elements has identical atomic size?
a) Ti, Zr
b) Zr, Hf
c) Na, K
d) La, Hf

62) Lutetium (Lu) is
a) A transition element
b) A lanthanide
c) An actinide
d) A p-block element

63) The element which is present in every amalgam is
a) Copper
b) Silver
c) Iron
d) Mercury

64) The atomic radii of the transition elements in a row are
a) Smaller than those of the s-block as well as p-block elements
b) Greater than those of the s-block as well as p-block elements
c) Smaller than those of the s-block but greater than those of the p-block
d) Greater than those of the s-block but smaller than those of the p-block.

65) The magnetic moment of a transition metal ion is found to be 3 . 87 B. M. The number of unpaired electrons present in it is
a) 2
b) 3
c) 4
d) 5

66) Which of the following are d-block elements but not regarded as transition elements?
a) Cu, Ag, Au
b) Zn, Cd, Hg
c) Fe, Co, Ni
d) Ru, Rh, Pd

67) Which of the following transition metals has the highest melting point?
a) Cr
b) Mo
c) W
d) Hg

68) The element showing the most stable +8 oxidation state in its compounds is
a) Ru
b) Mn
c) Re
d) Os

69) Which of the following does not contain a covalent bond?
a)
b)
c)
d)

70) Which of the following does not show colour due to charge transfer spectra?
a)
b)
c)
d)

71) Which of the following statements is incorrect?
a)
b)
c) Mercurous ion is colourless
d)

72) The correct order of reactivity of halogens with the 3d- transition series is
a) F < Cl < Br < I
b) F > Cl > Br > I
c) Cl > Br > I > F
d) I > Br > Cl > F

73) The ionic character of the halides of metals (3 d-transi-tion series) decreases in the order
a) M – l > M – Br > M – Cl > M – F
b) m – Cl > M – Br > M – l > M – F
c) M – Br > M – Cl > M – F > M – l
d) M – F > M – Cl > M – Br > M – l

74) Which of the following sulphides is not black in colour?
a) CuS
b) MnS
c) CoS
d) NiS

75) Chromite ore has the formula
a)
b)
c)
d) Both (a) and (b)

76) In alkaline medium, the equivalent mass of KMnO4 is(M = molecular mass)
a)
b)
c)
d) M

77) If M is an element of the actinide series, the degree of complex formation decreases in the order
a)
b)
c)
d)

78) The lanthanides used in glass blowers goggles are
a) Pr and Nd
b) Eu and Gd
c) Tb and Dy
d) Pm and Sm

79) Low spin complexes are generally formed by elements of the
a) 3d-Series
b) 4d-Series
c) 5d-Series
d) Both (b) and (c)

80) If the lanthanide element with xf electrons has a pink colour, then the lanthanide with (14 – x) f
electrons will have the colour

a) Blue
b) Red
c) Green
d) Pink

81) Which lanthanide compound is used in a most powerful liquid laser after dissolving it in selenium oxychloride?
a) Cerium oxide
b) Neodymium oxide
c) Promethium sulphate
d) Ceric sulphate

82) K2Cr2O7 is preferred to Na2Cr2O7 for use in volumetric analysis as a primary standard because
a)
b)
c)
d) None of the above

83) Which of the following transition metals shows variable valency?
a) Sc
b) Y
c) Fe
d) Ac

84) The first man made (synthetic) transition metal is
a) Pm
b) Tc
c) Nb
d) Zr

85) Which of the following groups of transition metals is called coinage metals?
a) Cu, Ag, Au
b) Ru, Rh, Pd
c) Fe, Co, Ni
d) Os, Ir, Pt

86) The metal used for making armoured steel for tanks and domestic safes is
a) Mn
b) Al
c) Pb
d) Cr

87) Pt dissolves in aqua regia due to the formation of
a)
b)
c)
d)

88) The most abundant transition metal is
a) Zn
b) Fe
c) Hg
d) Au

89) The transition metal used for making joints in jewellery is
a) Zn
b) Cu
c) Ag
d) Cd

90) Browns catalyst is
a) Pt/PtO
b)
c) Nickel boride
d) None

91) CuSO4 solution + lime is called
a)
b)
c) Fehling solution
d) Bordeaux mixture

92) A mixture of TiO2 and BaSO4 is called
a) Titanox
b) Lithopone
c) White pigment
d) None

93) The most common oxidation state of the lanthanide series is
a) +2
b) +3
c) +4
d) +1

94) Vanadyl ion is
a)
b)
c)
d)

95) Which of the following cannot reduce acidified solution of MnO4 ion ?
a)
b)
c) H (nascent)
d)

96) In aqueous solution, Eu2+ ion acts as
a) An oxidising agent
b) A reducing agent
c) Either (a) or (b)
d) None of these

97) Cerium can show the oxidation state of + 4 because
a) It resembles the carbon family
b) It has a very low value of I.E.
c) Of its tendency to attain the noble gas configuration of Xenon
d) Two s and two f electrons can be lost easily

98) Which of the following contains the maximum number of unpaired electrons ?
a)
b)
c)
d)

99) Which of the following is paramagnetic ?
a)
b)
c)
d)

100) The deep blue colour produced on adding H2O2 to acidified K2Cr2O7 solution is due to the formation of
a)
b)
c)
d)


Answer

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