Transition And Inner Transition Elements MHT-CET PYQ's

 MHT-CET 2004 

1. Oxidation state of iron in Fe3O4 is

• (A) 8/3
• (B) 3/4
• (C) 3/2
• (D) 1/2

MHT-CET 2008 

2. Which of the following ions is colourless in solution? 

• (A) V³⁺
• (B) Cr³⁺
• (C) Co²⁺
• (D) Sc³⁺

3. The general electronic configuration of the transition elements is 

• (A) (n - 1)d¹⁰, (n +1)s² 
• (B) (n - 1)d^1-10, (n + 1)^1-2
  
• (C) (n - 1)^1-10, np⁶, ns² 
  
• (D) (n - 1)d^1-10, ns^1-2

4. The point of dissimilarity between lanthanides and actinides is

• (A) three outermost shells are partially filled. 
• (B) they show oxidation state of + 3 (common). 
• (C) they are called inner transition elements. 
• (D) they are radioactive in nature.

5. Calamine is 

• (A) CaCO₃ 
• (B) MgCO₃ 
• (C) ZnCO₃ 
• (D) CaCO₃ + CaO

MHT-CET 2009 

6. Most basic hydroxide among the following is 

• (A) Lu(OH)₃ 
• (B) Eu(OH)₃ 
• (C) Yb(OH)₃ 
• (D) Ce(OH)₃
  

7. The maximum number of unpaired electrons is present in 

• (A) Fe 
• (B) Cu 
• (C) Co 
• (D) Ni

MHT-CET 2010 

8. Which gives +7 oxidation state? 

• (A) Mn(25) 
• (B) Cr(24)
• (C) Cu(29) 
• (D) Fe(26)

9. Ce4+ is stable. This is because of 

• (A) half-filled d-orbital
• (B) all paired electrons in d-orbital
• (C) empty orbital
• (D) fully filled d-orbital

MHT-CET 2011

10. Most common oxidation states shown by cerium are

• (A) +2, +4
• (B) +3, +4
• (C) +3, +5
• (D) +2, +3

MHT-CET 2012

11. Which of the following species shows the maximum magnetic moment?

• (A) Mn6+
• (B) Ni2+
• (C) Fe3+
• (D) Ag+

12. The oxidation state of Cr in K2Cr2O7 is

• (A) +4
• (B) +3
• (C) +6
• (D) +5 

13. Which of the following is not an iron ore? 

• (A) Malachite
• (B) Haematite 
• (C) Siderite
• (D) Limonite

MHT-CET 2013

14. which of the following lanthanoid ions is diamagnetic? (Atomic no. of Ce = 58, Sm = 62, Eu = 63, Yb = 70) 

• (A) Ce2+
• (B) Sm2+
• (C) Eu2+
• (D) Yb2+

MHT-CET 2014 

15. Select the coloured compound amongst the following. (Atomic no. of Ti = 22. Cr = 24. Cu = 29. Zn = 30) 

• (A) TiC14
• (B) CrCl3
• (C) ZnCl3
• (D) CuCl

MHT-CET 2015 

16. Potassium dichromate is a good oxidizing agent, in acidic medium the oxidation state of chromium changes by 

• (A) 2 
• (B) 3
• (C) 4 
• (D) 5
  

17. The only radioactive element among the lanthanoids is 

• (A) Gadolinium 
• (B) Holmium 
• (C) Promethium
• (D) Neodymium

MHT-CET 2016

 18. How is sodium chromate converted into sodium dichromate in the manufacture of potasstum dichromate from chromite ore? 

• (A) By the action of concentrated sulphuric acid 
• (B) By roasting with soda ash 
• (C) By the action of sodium hydroxide 
• (D) By the action of lime stone

19. Identify the metal that forms colourless compounds. 

• (A) Iron (Z = 26) 
• (B) Chromium (Z = 24)
• (C) Vanadium (Z = 23) 
• (D) Scandium (Z - 21) 

MHT-CET 2018 

20. The most basic hydroxide from following is 

• (A) Pr(OH)3 (Z = 59) 
• (B) Sm(OH)3 (Z = 62) 
• (C) Ho(OH)3 (Z = 67)
• (D) La(OH)3 (Z = 57) 

21 . Identify the oxidation states of titanium (Z = 22) and copper (Z = 29) in their colourless compounds.

• (A) Ti³+ , Cu²+
• (B) Ti²+, Cu²+
• (C) Ti4+,Cu1+
• (D) Ti4+, Cu²+

MHT-CET 2019 

22. The ionic charges on chromate ion and dichromate ion respectively is 

• (A) -2. -2 
• (B) -3. -2
• (C) -2, -4
• (D) -4, -2

23. When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate  is formed the product obtained is

• (A) KMnO4 
• (B) K2MnO3 
• (C) K2MnO4
• (D) K2SO4

24. The ionic charges of manganate and permanganate ion are respectively 

• (A) -1, -2
• (B) -2,-1 
• (C) -1, -1
• (D) -2, -2

25. Select the ion which has maximum effective magnetic moment. 

• (A) Mn³+(Z = 25)
• (B) V³+(Z = 23)
• (C) Cu²+(Z = 29) 
• (D) Fe³+(Z = 26) 

26. Which of the following elements belongs to the first inner transition series?  

• (A) Curium 
• (B) Americium 
• (C) Protactinium 
• (D) Promethiunium

27. Which of the following elements has highest second ionization enthalpy?

• (A) Cu(Z = 29)
• (B) Zn(Z = 30)
• (C) Co( Z = 27)
• (D) Fe(Z = 26) 

28. Which among the following elements has completely filled 4f subshell? 

• (A) Tm (Z = 69) 
• (B) Ho (Z = 67) 
• (C) Yb (Z = 70) 
• (D)Gd (Z = 64)

29. Which among the following substances is used as a catalyst for thermal decomposition of potassium chlorate? 

• (A) MnO2 
• (B) CuCl2 
• (C) Fe
• (D) V2O5 

30. Cobalt - Thorium alloy is used as catalyst in the process of 

• (A) manufacture of H2SO4 
• (B) synthesis of gasoline 
• (C) decomposition of KClO3 to O2 
• (D) hydrogenation of oils 

31. The highest oxidation state in plutonium (At. No = 94) is 

• (A) +7 
• (B) +6 
• (C) +5 
• (D) +4

32. Limestone is used as a flux in the extraction of 

• (A) Zinc 
• (B) Iron 
• (C) Copper
• (D) Aluminium

33. Which of the following is NOT the mineral of iron? 

• (A) Magnetite 
• (B) Limonite 
• (C) Haematite 
• (D) Corundum

34. Identify the pair of flux and the slag respectively in the extraction process of iron

• (A) Lime stone and calcium silicate 
• (B) Calcium silicate and lime stone 
• (C) Sand and ferrous silicate 
• (D) Ferrous silicate and sand 

35. Which among the following is an ore 

• (A) FeS2 
• (B) Fe2O3
• (C) FeCO3
• (D) Fe3O4

36. The mineral of iron is 

• (A) Limonite 
• (B) Cryolite
• (C) Calamine
• (D) Epsum salt

MHT-CET 2020

37. Which among the following elements has lowest density and is lightest? 

• (A) Scandium 
• (B) Cobalt 
• (C) Copper 
• (D) Iron

38. Which among the following elements is a soft element as compared to others? 

• (A) Zn
• (B) Mo
• (C) W
• (D) Co

39. Which among the following reactions occurs at the zone of slag formation in extraction of iron by blast furnace?

• (A) C + 1/2O2 → CO 
• (B) Fe2O3 + 3C → 2Fe + 3CO
  
• (C) CaO +SiO2 → CaSiO3
• (D) Fe2O3 + 3CO → 2Fe + 3CO2

40. Identify the correct statement from following.

• (A) Lanthanoids have greater tendency to form complexex than actinoids.
• (B) Actionoid contraction is greater than lanthanoid contraction.
• (C) Binding energy of 4f - orbitals is lower than 5f - orbitals.
• (D) Hydroxides of actinoids are less basic than Lanthanoid hydroxides.

41. What is the position elements La(Z = 57) and Ce(Z = 58) respectively in the long from of following periodic table?

• (A) La = Group-4, Period-7,, Ce = Group-5, Period-7
• (B) La = Group-3, Period-6,, Ce = Group-3, Period-6
• (C) La = Group-3, Period-7,, Ce = Group-3, Period-6
• (D) La = Group-3, Period-6,, Ce = Group-3, Period-7

42. Which element from following forms colourless compounds in +2 oxidation state?

• (A) Zn(Z = 30)
• (B) Cu(Z = 29)
• (C) Mn(Z = 25)
• (D) Co(Z = 27)

43. Which among following processes occurs at 1500 K in blast furnace for extraction of iron?

• (A) Slag formation
• (B) Combustion coke
• (C) Reduction of ore
• (D) Ore loses moisture.

44. Which among the following lanthanoids has smallest atomic size? 

• (A) Pm
• (B) Ce 
• (C) Sm 
• (D) Pr

45. What is the formula of calamine? 

• (A) MgCO3, CaCO3 
• (B) Fe2O3 
• (C) ZnCO3 
• (D) FeCO3 

46. Identify correct decreasing order of ionic radii of lanthanoids. 

• (A) Sm > Gd > Ce > Pm 
• (B) Ce > Pm > Sm > Gd
• (C) Pm > Sm > Ce > Gd 
• (D) Gd > Pm > Ce > Sm
  

47. Which of the following elements exhibits oxidation states other than +3?

• (A) Gd
• (B) La 
• (C) Ce 
• (D)Lu

48. What is the role of tuyers used in blast furnace for extraction of iron? 

• (A)To blow a blast of preheated air in to the furnace 
• (B) It enables the even distribution of charge.
• (C) It is used to remove molten slag and iron.
• (D) It prevents loss of hot gases

49. What is the formula of pyrolusite ore? 

• (A) MnO2
• (B) PbCrO4
• (C) Cu2O
• (D) Cr2O3

50. Which reaction from following occurs at 2000 K in the blast furnace for extraction of iron? 

• (A) CaCO3 → CaO + CO2 
• (B) CaO + SiO2 → CaSiO3
• (C) 2C + O2 → 2CO
• (D) Fe2O3 + 3CO → 2Fe + 3CO2 

51. Which from following elements has lowest tendency to form its oxide? 

• (A) Al
• (B) Fe
• (C) Hg
• (D) Cr

52. Which of the following is a product of first step and is used as reactant in next step for manufacture of  K2Cr2O7 from concentrated chromite ore? 

• (A) Sodium dichromate 
• (B) Sodium sulphate 
• (C) Sodium chromate 
• (D) potassium chromate

53. What is the value of effective magnetic moment found in +3 oxidation state of Chromium (Z = 24)?

• (A) 1.73 BM
• (B) 4.90 BM 
• (C) 2.84 BM 
• (D) 3.87 BM

54. Which among the following lanthanoids, shows only only +3 oxidation state?

• (A) Cerium 
• (B) Gadolinium 
• (C) Terbium
• (D) Neodymium

55. Identify the element having enthalpy of atomization from following.

• (A) Cu (Z = 29)
• (B) Fe (Z = 26)
• (C) Sc (Z = 21)
• (D) Zn (Z = 10)

56. Which of the following elements belongs to first inner transition series?

• (A) Pu
• (B) Fm
• (C) Bk
• (D) Pr

57. Which of the following actinoids exhibits only +3 oxidation state? 

• (A) Th (Z = 90) 
• (B) Lr (Z = 103)
• (C) U (Z = 92)
• (D) Pa (Z =91)

 58. What is the highest oxidation state exhibited by any transition element among all?

• (A) +8 
• (B) +6 
• (C) +7 
• (D) +5 

59. What is the highest oxidation state exhibited actinoids? 

• (A) +6 
• (B) +3 
• (C) +4
• (D) +7
  

60. Which of the following oxyacids of sulphur contain four S = O bonds? 

• (A) H2SO4 
• (B) H2S2O4 
• (C) H2S2O6 
• (D) H2SO5 

61. Identify the correct decreasing order of densities of d-block elements. 

• (A) Ni > Fe > Cr > V 
• (B) Cr > Fe > V > Ni 
• (C) Fe > Ni > V > Cr 
• (D) V > Cr > Fe > Ni

62. Which among the following sets of elements is present in chalcopyrite? 

• (A) Al, O 
• (B) Fe, S 
• (C) Cu, Fe, S 
• (D) Al, Fe, O 

63. Which among the following elements is radioactive? 

• (A) Eu 
• (B) Nd 
• (C) Pm 
• (D) Lu

64. Identify the element if it's expected electronic configuration is [Ar]3d¹⁰4s². 

• (A) Cd 
• (B) Co 
• (C)Zn 
• (D)Hg

65. Which among the following elements possesses one electron in 4s orbital in observed electron configuration? 

• (A) Cu(Z = 29) 
• (B) Ni(Z = 28) 
• (C) V(Z = 23) 
• (D) Mn(Z = 25)

66. Identify the mineral of iron from following. 

• (A) Magnesite
• (B) Calamine
• (C) Siderite 
• (D) Willemite
  

67. Which cation from following does NOT form colourless compound? (Atomic number - Cu = 29, Ti = 22, Zn = 30, Sc = 21) 

• (A) Ti³
• (B) Cu
• (C) Sc³
• (D) Zn

68. Which mineral among following contains zinc? 

• (A) Willemite 
• (B) Malachire
• (C) Corundum
• (D) Azurite

69. Which among the following actinoids exhibits highest oxidation state +7?

• (A) Pu 
• (B) Lr 
• (C) Cf 
• (D) Th

70. Which element among the following exhibits electronic configuration as [Xe]4f⁰ in + 4 oxidation state? 

• (A) Dysprosium (Z = 66) 
• (B) Praseodymiun (Z = 59)
• (C) Neodymium (Z = 60)
• (D) Cerium (Z = 58) 

71. Which among the following pairs of elements in their respective oxidation states will have same value of effective magnetic moment?

(Atomic number : Sc = 21, Ti = 22, Cr = 24, Co = 27, Ni = 28, Zn = 30) 

• (A) Zn²+ and Cr³+
• (B) Ni²+ and Ti³+
• (C) Sc³+ and Ti³+
• (D) Cr³+ and Co²+

72.  Which of the following compounds is used as an ore of iron

• (A) Fe3O4
• (B) FeCO3
• (C) Fe2O3
• (D) 2Fe2O3.3H2O

73. Roasting is generally employed for ores containing

• (A) oxide 
• (B) carbonates
• (C) nitrates
• (D) sulphides

74. Which of the following elements possesses one unpaired electron in 5d orbital in observed electronic configuration?

• (A) Eu (Z = 63)
• (B) Gd (Z = 64)
• (C) Nd (Z = 60)
• (D Yb (Z = 70)

75. Which among the following elements belongs to second inner transition series? 

• (A) Nd 
• (B) Er 
• (C) Np 
• (D) Lu

76. Which among the following hydroxides is most ionic in nature? 

• (A) Eu(OH)3 
• (B) Ce(OH)3 
• (C) Lu(OH)3
• (D) La(OH)3 

77. Which zone of blast furnace used to extract iron, reduces MnO2 and Ca3(PO4)2 to Mn and P? 

• (A) Zone of reduction 
• (B) Zone of combustion 
• (C) Zone of slag formation 
• (D) Zone of fusion 

78. Which zone of blast furnace in extraction of iron works out the following reaction? 

Fe2O3 + 3CO → 2Fe + 3CO2 

• (A) Zone of reduction 
• (B) Zone of slag formation 
• (C) Zone.of combustion 
• (D) Zone of fusion 

79.1dentify the soft element from following. 

• (A) W 
• (B) Cr 
• (C) Mo 
• (D) Cd

80. Which element among the following has highest number of unpaired electrons in observed electronic configuration? 

• (A) Scandium (Z = 21) 
• (B) Copper (Z = 29) 
• (C) Titanium (Z = 22) 
• (D) Chromium (Z = 24)
  

81. Which among the following hydrides have low bond dissociation energy of M-H bond (M = Central atom)? 

• (A) H2O
• (B) H2Se
• (C) H2S
• (D) H2Te

82. Which among the following elements belongs to second inner transition series?

• (A) Sm 
• (B) Am 
• (C) Dy 
• (D) Lu

83. Which of the following properties is NOT of actinoids? 

• (A) These have greater tendency to form complexes. 
• (B) Binding energy of 5f orbitals is lower than 4f orbitals. 
• (C) Hydroxides of these are more basic in nature than lanthanoids.
  
• (D) Some of the ions of these are fairly coloured.

84. Which element among the following has empty 5d-orbital in observed electronic configuration?

• (A) Lu (Z = 71 )
• (B) La (Z = 57)
• (C) Yb (Z = 70)
• (D) Gd (Z = 64)

85. Which among the following elements is NOT a lanthanoid? 

• (A) Sm
• (B) Ce
• (C) Pr
• (D) Pu

86. Which among the following reactions occurs at zone of slag formation in the process extraction of iron by blast furnace? 

• (A) 12CaO + 2Al2O3 → 4Ca3AlO3 + 3O2
• (B) C + 1/2O2 → CO
• (C) Fe2O3 + 3CO → 2Fe + 3CO2
• (D) 2CO → O2 + 2C

87. Which of the following properties is NOT of lanthanoids?

• (A) Binding energy of 4f orbitals is higher. 
• (B) In these differentiating electron enters in 4f-orbitals. 
• (C) These elements can't form oxocations. 
• (D) Most of the elements of these do not occur in nature but prepared in laboratory. 

88. Which among the following elements does NOT form oxocation? 

• (A) U
• (B) Lu 
• (C) Pu 
• (D) Np

89. Which cation from following forms colourless compounds? (Atomic No. : Ti = 22, Cr = 24, Ni = 28, Fe = 26)

• (A) Ti4+
• (B) Fe³+ 
• (C) Ni²+ 
• (D) Cr³+

90. Which from following elements exhibits oxidation states from + 1 to +6?

• (A) Mn (Z = 25) 
• (B) Cr (Z = 24) 
• (C) Fe (Z = 26)
• (D) Cu (Z = 29)

91. Which of the following metals reacts with dilute H2SO4 ?

• (A) Cu 
• (B) Hg 
• (C) Fe
• (D) Bi

92. What is the melting point of zinc? 

• (A) 473 K 
• (B) 692 K
• (C) 423 K
• (D) 1193 K
  

93. Which of the following elements has six unpaired electrons in observed electronic configuration?

• (A) Cu (Z = 29) 
• (B) Cr (Z = 24) 
• (C) Mn (Z = 25) 
• (D) Fe (Z = 26)

94. Which among the following pairs of percentage of carbon and the property of cast iron is true?

• (A) 4.0 % C, hard and brittle 
• (B) Less than 0.2 % C, very soft 
• (C) 0.2 to 2.0 % C, very soft 
• (D) 0.2 to 2.0 % C, forms steel alloy 

95. Which of the following methods is used for concentration of iron ore? 

• (A) Washing in current of water 
• (B) Froth floatation 
• (C) Dissolving the ore in water solution of NaOH or Na2CO3 
• (D) Electromagnetic separation 

96. What is the temperature needed for decomposition of lime stone in blast furnace far of iron? 

• (A) 2000 K 
• (B) 1200 K
• (C) 500 K
• (D) 1500 K

97. Which among the following changes at 900 K in blast furnace for extraction of iron?

• (A) Limestone decomposes 
• (B) Reduction of ore by C
• (C) Reduction of ore by CO
• (D) Ore losses moisture

98. Identify the formula of lanthanoid oxide formed when lanthanoid (Ln) is burnt in oxygen.

• (A) Ln2O3
  
• (B) LnO2
• (C) Ln2O
• (D) LnO

99. Which element among the following exhibits electronic configuration as [Xe]4f7 in +4 oxidation state?

• (A) Neodymium (Z = 60) 
• (B) Terbium (Z =65)
• (C) Praseodymium (Z = 59)
• (D) Cerium (Z = 58)