D-F Block Elements Transition Elements MCQs – 3

1) Gold exhibits the variable oxidation states of.
a) +2, +3
b) +l,+3
c) +2,+4
d) +l,+2

2) Hair dyes may contain
a)

b)
c)
d)

3) CuCl or absorbs
a)

b)
c)
d)

4) The element that does not give a nitride is
a) Al

b) Mg
c) Ag
d) Ca

5) When copper reacts with conc. H2SO4 , the product formed is
a)

b)
c)
d)

6) Which of the following is diamagnetic ?
a)
b)
c)
d)

7) When copper nitrate is heated strongly, the residue consists of
a) Copper metal
b) Cuprous oxide
c) Cupric oxide
d) Copper nitrate

8) does not form a complex with
a) AgI

b) AgBr
c) AgCl
d) None

9) From among CuSo4 , CdSO4 and AgCl, NH3 forms a complex with
a)

b)
c)
d) All of these

10) is passed through an acidified solution of and a black precipitate is formed. This is due to
a)

b)
c) Neither oxidation nor reduction
d) Reduction and oxidaion

11) Nitric oxide is prepared by the action of on
a) Fe

b) Cu
c) Sn
d) Zn

12) The precipitate of AgCl is soluble in
a)
b)
c)
d) HCl

13) Worm Silver is
a)
b)
c)
d)

14) Articles made of copper and bronze slowly tarnish in air and turn green. The green colour is due to the formation of
a) Copper oxide
b) Copper sulphide
c) Copper oxalate
d) Basic copper carbonate

15) Among the following metals the one that does not liberate from dilute is
a) Al
b) Mg
c) Cu
d) Zn

16) Which of the following is called argentite ?
a)
b)
c)
d)

17) Which of the following does not dissolve in conc. solution?
a) AgF

b) AgCl
c) AgBr
d) AgI

18) Purple of cassius is a colloidal solution of
a) Au
b) Ag
c) Cu
d) Cr

19) Which of the following is malachite ore ?
a)
b)
c)
d)

20) From among Au3+, Ag+and Cu2+, hydrogen can reduce
a)
b)
c)
d) All of these

21) Which of the following is obtained by bubbling through a solution of ?
a)
b)
c)
d)

22) Silver iodide is used to produce artificial rain because
a) It is easily prepared
b) Its structure is ice like
c) It can easily be sprayed at high altitude
d) Insoluble in rain water

23) The solubility of AgBr in hypo is due to the formation of
a)
b)
c)
d)

24) gives a red precipitate with which of the following?
a)

b)
c)
d)

25) Which of the following is/ are soluble in water?
a)

b)
c)
d) All the above

26) If excess of NH4OH is added to solution it forms
a)
b)
c)
d)

27) The nitrate of a certain metal leaves metallic globules on heating strongly. The nitrate may be
a)

b)
c)
d)

28) Hydrated gold is
a) Acidic
b) Basic
c) Amphoteric
d) Neutral

29) In the electroplating of gold the electrolyte used is
a) Gold chloride
b) Gold nitrate
c) Gold sulphate
d) Potassium aurocyanide

30) In Deacons process the catalyst used is
a)
b)
c)
d)

31) formed by oxidation of is
a) Diamagnetic
b) Paramagnetic
c) Fero magnetic
d) Ferrimagnetic

32) Which of the following is a coinage metal ?
a) Zn
b) Sn
c) Pb
d) Cu

33) Metallic silver may be obtained from AgCl by
a)
b) Fusing it with sand
c)
d)

34) Which of the following statements is not correct?
a) Ag is the best conductor of heat and electricity

b) Molten silver dissolves 20 times its volume of oxygen
c) Silver amalgam is used in filling of teeth
d) none of the above

35) The anomalous configuration of Cu (Z = 29) is
a)

b)
c)
d) None

36) Which of the following configurations is that of a coinage metal?
a) 2,8,8,3

b) 2,8,8,2
c) 2,8,1
d) 2,8,18,1

37) Which of the following statements is not correct ?
a) All silver halides except AgF are insoluble in water

b) AgI is not sensitive in light
c) AgBr is more sensitive to photo reduction
d) None of the above

38) Carat is a measure of
a) Impure gold

b) Fineness or purity of gold
c) Pure gold
d) None

39) Almost pure gold is
a) 24 carat
b) 22 carat
c) 18 carat
d) 14 carat

40) Which among the following statements is not correct ?
a) Gold is soluble in mercury

b) 20 carat gold contains 83.33% pure gold
c) The nobility of Au, Ag and Cu increases in the order Cu < Ag < Au.
d) None. All are correct

41) A metal is left exposed to air for sometime. It became coated with basic green carbonate.The metal exposed is expected to be
a) K
b) Cu
c) Zn
d) Al

42) The percentage of gold in 21.6 carat gold is
a) 21.8%

b) 90%
c) 45%
d) 60%

43) Which of the following is not diamagnetic ?
a)
b)
c)
d)

44) Which element is alloyed with copper to form bronze ?
a) Fe

b) Mn
c) Sn
d) Zn

45) In vapour state and exist as
a) Dimer, monomer respectively
b) Monomer, dimer respectively<
c) Monomer, monomer respectively<
d) Dimer, dimer respectively<

46) An alloy which does not contain copper is
a) Solder
b) Bronze
c) Brass
d) Bell metal

47) The blue complex formed on addition of conc. NH4OH solution to CuS04 solution has the formula
a)

b)
c)
d)

48) Gold and silver are called noble metals, because
a) They do not normally react in their natural environment
b) Even acids cannot dissolve them without strong heat
c) They are used in jewellery
d) They are worn by noblemen

49) Density, malleabillity and ductility in coinage metals increase in the order
a) Cu, Ag, Au
b) Au, Ag, Cu
c) Ag, Au, Cu
d) Ag, Cu, Au

50) Which of the following may be consumed in the elemental form by human beings?
a) Zn

b) Cu
c) Ag
d) Fe

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

52) In the electrolytic purification of copper, some gold is found in the
a) Cathode
b) Cathode mud
c) Anode mud
d) Electrolyte

53) Copper displaces which of the following metals from its salt solution ?
a)

b)
c)
d) All

54) The structure of is
a) Square Planar
b) Tetrahedral
c) Octahedral
d) Distorted rectangle

55) Which of the following is least soluble in ammonia ?
a) AgF
b) AgCl
c) AgBr
d) AgI

56) Impurities of lead in silver are removed by
a)

b) Solvay Process
c) Cyanide Process
d) Amalgam Process

57) Artificial rain is produced by seeding clouds with
a) Silver iodide

b) Silver nitrate
c) Silver chloride
d) Aluminium chloride

58) The percentage of silver in an alloy of german silver is
a) 1.5%

b) 2.5%
c) 10%
d) Zero percent

59) The Aufbau law is not valid for
a) Cu and Ar

b) Cu and Cr
c) Cr and Ar
d) Fe and Ag

60) Gold dissolves in aqua regia due to the formation of
a) Nascent hydrogen

b) Nascent chlorine
c) Nascent nitrogen
d) Nascent oxygen

61) Aqua regia is the only acid which will dissolve
a) Gold

b) Silver
c) Platinum
d) Aluminium

62) Silver halides are used in photography as they are
a) Photosensitive
b) Soluble in sodium thiosulphate solution
c)
d) Insoluble in acids

63) Photographic films and plates have as an essential ingredient
a)

b) AgBr
c) NaCl
d) Oleic acid

64) AgCl is insoluble in water but soluble in a solution of ammonia because
a)
b)
c)
d)

65) Which of the following is called ruby copper ?
a)
b)
c)
d)

66) Which of the following statements is not correct ?
a) Molten lead and molten zinc aremiscible
b) Silver is more soluble in molten zinc than in lead
c) Zn-Ag alloy is volatile
d) Zn-Ag alloy is heavier and gets solidified later than lead

67) Which of the following properties is not characteristic of copper ?
a) High thermal conductivity
b) Low electrical conductivity
c) Good ductility
d) Good malleability

68) Fools gold is
a)

b)
c)
d)

69) Paris green is an insecticide made up of
a)

b)
c)
d)

70) Anhydrous salts of and are
a) Red
b) Blue
c) White
d) Black

71) Which of the following statements is most applicable to hydrogen ? It can act
a) As a reducing agent only
b) As an oxidising agent only
c) Both as an oxidising and a reducing agent
d) Neither as an oxidising nor as a reducing agent

72) When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is
a) 1 : 1
b) 1 : 2
c) 2 : 1
d) 9 : 4

73) Which of the following metals adsorbs the largest volume hydrogen per unit surface area?
a) Zn
b) Pd
c) Al
d) K

74) Which of the following metal evolves hydrogen on reacting with cold dilute HNO3?
a) Mg
b) Al
c) Fe
d) Cu

75) Iron (III)
a)
b)
c) Is isoelectronic with Co (II)
d) Is isoelectronic with Mn (II)

76) Ammonium dichromate on heating decomposes with spark. This reaction is called
a) A phosphorescence
b) Incandescence
c) a chemical volcano
d) None of these

77) A mixture of K2Cr2O7 and conc. H2SO4 is called
a) Perchromic acid
b) Chromic acid
c) Chromium sulphate
d) None of these

78) The actinides showing a +7 oxidation state are
a) U, Np
b) Pu, Am
c) Np, Pu
d) Am, Cm

79) Within each transition series, the oxidation states
a) Decrease regularly in moving from left to right
b) First increase till the middle of the period and then decrease
c) First decrease till the middle of period and then increase
d) None of the trend is correct

80) A@ When the acidified solution of K2Cr2O7 is shaken with an aqueous solution of FeSO4, then
a)
b)
c)
d)

81) Lanthanide contraction relates to
a) Atomic radii
b)
c) Valence electrons
d) Oxidation states

82) The image on an exposed and developed photographic film is due to
a) AgBr
b)
c) Ag
d)

83) Which of the following concentrated solutions will be able to dissolve Zn metal ?
a)
b) NaCI
c) NaOH
d)

84) The correct statement(s) from among the following is/are
(i) All the d and f-block elements are metals
(ii) All the d and f-block elements form coloured ions
(iii) All the d- and f-block elements form paramagnetic ions

a) (i) Only
b) (i) and (ii)
c) (ii) and (iii)
d) All

85) One of the products formed when K2Cr2O7 reacts with conc. H2SO4 in the cold is
a)
b)
c)
d)

86) The highest degree of paramagnetism per mole of the compound at 25°C will be shown by
a)
b)
c)
d)

87) The oxidation of oxalic acid by acidified KMnO4 is an example of autocatalysis. It is due to the presence of
a)
b)
c)
d)

88) In the redox reaction involving Cr2O2-7 and Fe2+ ions the number of electrons absorbed per chromium atom is
a) 1
b) 3
c) 4
d) 6

89) Which oxide of vanadium is most likely to be basic and ionic ?
a) VO
b)
c)
d)

90) The transition metal present in vitamin B12 is
a) Fe
b) Co
c) Ni
d) Na

91) Paris green is a
a)
b)
c)
d) Double salt of Cu and Ag nitrates

92) The reaction between the following pairs will produce H2 except
a) Na + Alcohol
b) Mg + Steam
c)
d) Cu + HCI

93) Which of the following is found in the body ?
a) Pb
b) Fe
c) Cd
d) AI

94) Nitriding is a process of surface hardening of steel by heating it in an atmosphere of
a)
b)
c) C
d)

95) The rusting of iron is (Select the incorrect statement):
a) Enhanced by wet air
b) Prevented on coating with Zn
c) Retarded in the presence of dissolved salts
d) Prevented by connecting article to Mg metal

96) Which one of the vanadium pentahalides exists ?
a)
b)
c)
d)

97) The most stable oxidation state of iron is
a) +2
b) +3
c) -2
d) -3

98) Which of the following is diamagnetic in nature ?
a)
b)
c)
d)

99) Transition metals mostly are
a) Diamagnetic
b) Paramagnetic
c) Neither diamagnetic nor paramagnetic
d) Both diamagnetic and paramagnetic

100) The ring test for nitrate is performed by adding freshly prepared FeSO4 solution and conc. H2SO4. The brown ring in this test is due to
a)
b)
c)
d)


Answer

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