The d- and f-Block Elements

Topics in this chapter

• Transition Properties and Applications
• Magnetic and Optical Properties
• Oxidation States and Redox Reactions
• Chromates, Dichromates and Permanganates
• Lanthanoids and Actinoids

Cheat sheet

Practice questions

1. Question 1Q-31AD69

   Which of the following transition metal ions has the maximum number of unpaired electrons in aqueous solution?

   1. A.Ti3+
   2. B.V3+
   3. C.Fe2+
   4. D.Mn2+
   See the answer and solution
2. Question 2Q-70EC37

   Why do transition elements exhibit higher enthalpies of atomization?

   1. A.Due to absence of vacant d-orbitals
   2. B.Due to involvement of a large number of electrons from $(n-1)d$ in addition to $ns$ electrons in interatomic bonding
   3. C.Due to completely filled $d$-orbitals leading to stable configurations
   4. D.Due to very small atomic radii of transition elements
   See the answer and solution
3. Question 3Q-CCE3F6

   Which of the following lanthanoid ions is diamagnetic?

   1. A.Ce3+
   2. B.Eu2+
   3. C.Yb2+
   4. D.Sm3+
   See the answer and solution
4. Question 4Q-C22F8D

   The gradual decrease in atomic and ionic radii along the lanthanoid series is known as lanthanoid contraction. This is primarily due to:

   1. A.Poor shielding of $4f$ electrons
   2. B.Effective shielding of $4f$ electrons
   3. C.Increasing nuclear charge being nullified by $5d$ electrons
   4. D.Decreasing nuclear charge along the series
   See the answer and solution
5. Question 5Q-A42E57

   Acidified potassium permanganate oxidizes oxalic acid to carbon dioxide. The stoichiometric coefficient of water in the balanced chemical equation is:

   1. A.5
   2. B.8
   3. C.10
   4. D.3
   See the answer and solution