The d- and f-Block Elements

Class 12 · Chemistry

63 questions24 easy22 medium17 hard

Sample Questions

Q1.Which of the following transition metals has the maximum number of oxidation states in the first series?

  • ASc
  • BMn
  • CFe
  • DNi

Q2.The enthalpies of atomisation of transition metals are high because:

  • AThey form ionic bonds
  • BBoth d and s electrons participate in metallic bonding
  • CThey have completely filled d orbitals
  • DTheir atomic masses are large

Q3.The half-reaction for MnO₄⁻ in acidic solution acting as oxidising agent is:

  • AMnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O
  • BMnO₄⁻ + 4H⁺ + 2e⁻ → MnO₂ + 2H₂O
  • CMnO₄⁻ + 2H₂O + 3e⁻ → MnO₂ + 4OH⁻
  • DMnO₄⁻ + e⁻ → MnO₄²⁻

Q4.Potassium dichromate reacts with oxalic acid (H₂C₂O₄) in acidic medium. In the balanced equation, the ratio of moles of K₂Cr₂O₇ to moles of H₂C₂O₄ is:

  • A1:3
  • B1:1
  • C3:1
  • D2:3

Q5.The common oxidation state of lanthanoids is:

  • A+2
  • B+3
  • C+4
  • D+5

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

Atomic and ionic radiiCatalytic propertiesColour of transition metal ionsElectronic configuration of transition metalsEnthalpies of atomisationFormation of complex compoundsGeneral properties of transition metalsImportant compounds: K2Cr2O7 and KMnO4Interstitial compounds and alloysLanthanoid contractionLanthanoids and actinoidsMagnetic propertiesOxidation states of transition metalsPosition of d-block and f-block elements

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