Atomos Test Generator Free PYQs ExamsMy practice Log in / Sign up free

d- and f-Block Elements

AIPMT 2004MCQEasyNot asked in last 5 yrs+4−1
Ques. 1AIPMT 2004

Among the following series of transition metal ions, the one where all metal ions have 3d2 electronic configuration is [At. Nos. Ti = 22, V = 23, Cr = 24, Mn = 25]

  1. Ti3+, V2+, Cr3+, Mn4+
  2. Ti+, V4+, Cr6+, Mn7+
  3. Ti4+, V3+, Cr2+, Mn3+
  4. Ti2+, V3+, Cr4+, Mn5+

Answer

(4) Ti2+, V3+, Cr4+, Mn5+

Solution

When a 3d-series atom forms an ion, the 4s electrons are lost first, so the number of 3d electrons in Mn+ = Z - 18 - n.

For series (4): Ti2+: 22 - 18 - 2 = 2; V3+: 23 - 18 - 3 = 2; Cr4+: 24 - 18 - 4 = 2; Mn5+: 25 - 18 - 5 = 2.

The other series fail: in (1), Ti3+ is 3d1; in (2), Ti+ is 3d24s1 and V4+ is 3d1; in (3), Ti4+ is 3d0.

All ions of series (4) are 3d2.

Answer: (4)

Keep practising — d- and f-Block Elements

Ques. 2AIPMT 2004

Lanthanoids are

  1. 14 elements in the sixth period (atomic no. 90 to 103) that are filling 4f sublevel
  2. 14 elements in the seventh period (atomic number = 90 to 103) that are filling 5f sublevel
  3. 14 elements in the sixth period (atomic number = 58 to 71) that are filling the 4f sublevel
  4. 14 elements in the seventh period (atomic number = 50 to 71) that are filling 4f sublevel.
Ques. 3AIPMT 2003

Which one of the following characteristics of the transition metals is associated with their catalytic activity?

  1. High enthalpy of atomization
  2. Paramagnetic behaviour
  3. Colour of hydrated ions
  4. Variable oxidation states
Ques. 4AIPMT 2003

The basic character of the transition metal monoxides follows the order (Atomic nos. Ti = 22, V = 23, Cr = 24, Fe = 26)

  1. VO > CrO > TiO > FeO
  2. CrO > VO > FeO > TiO
  3. TiO > FeO > VO > CrO
  4. TiO > VO > CrO > FeO
Ques. 5AIPMT 2003

The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ is (Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71)

  1. Y3+ < La3+ < Eu3+ < Lu3+
  2. Y3+ < Lu3+ < Eu3+ < La3+
  3. Lu3+ < Eu3+ < La3+ < Y3+
  4. La3+ < Eu3+ < Lu3+ < Y3+
Ques. 6AIPMT 2002

General electronic configuration of lanthanides is

  1. (n-2)f1-14 (n-1)s2p6d0-1 ns2
  2. (n-2)f0-14 (n-1)d0-1 ns2
  3. (n-2)f0-14 (n-1)d10 ns2
  4. (n-2)d0-1 (n-1)f1-14 ns2
Ques. 7AIPMT 2002

Which of the following shows maximum number of oxidation states?

  1. Cr
  2. Fe
  3. Mn
  4. V
Ques. 8AIPMT 2001

Which of the following statements is not correct?

  1. La(OH)3 is less basic than Lu(OH)3.
  2. In lanthanide series ionic radius of Ln3+ ion decreases.
  3. La is actually an element of transition series rather than lanthanides.
  4. Atomic radii of Zr and Hf are nearly the same because of lanthanide contraction.
Ques. 9AIPMT 2000

Which of the following shows maximum number of oxidation states?

  1. Cr
  2. Fe
  3. Mn
  4. V
Ques. 10AIPMT 2000

Which ion is colourless?

  1. Cr4+
  2. Sc3+
  3. Ti3+
  4. V3+

All d- and f-Block Elements PYQs →

PDFDownload d- and f-Block Elements PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolid StateSolutionsElectrochemistryChemical KineticsSurface Chemistry
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular StructureHydrogens-Block Elementsp-Block Elements (Group 13 & 14)Environmental ChemistryGeneral Principles of Isolation of Elementsp-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPolymersChemistry in Everyday LifePrinciples Related to Practical Chemistry