Download App

The d & f Block Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
Although +3 is the characteristic oxidation state for lanthanoids but cerium also shows +4 oxidation state because ___________.
  • A
    It has variable ionisation enthalpy
  • B
    It has a tendency to attain noble gas configuration
  • C
    It has a tendency to attain f0 configuration
  • D
    It resembles Pb4+
✓

Answer

  1. It has a tendency to attain noble gas configuration
  2. It has a tendency to attain f0 configuration

Explanation:

Cerium shows +4 oxidation state also because it has a tendency to attain noble gas configuration and attain f° configuration.

Ce – 4f1 5d’ 6s2 (Ce4+ – 4f°)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from The d & f Block Elements→The d & f Block Elements — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Which element can have oxidation state from $4 $ to $6 $?
→
The only cations present in a slightly acidic solutions are $Fe^{3+},\,Zn^{2+}$ and $Cu^{2+}$. The reagent that when added in excess to this solution would identify and separate $Fe^{3+}$ in one step is
→
Which of the following reaction is best to prepare aldehyde
→
The general formula for monocarboxylic acids is
→
The vapour pressure of water at room temperature is $23.8\, mm\, Hg$. The vapour pressure of an aqueous solution of sucrose with mole fraction of $0.1$ is equal to .......... $mm\, Hg$.
→
$S{O_2}$ is obtained when
→
Pyrolysis of acetone gives $C{H_2} = C = O$ called
→
The decomposition of ${N_2}{O_5}$ occurs as, $2{N_2}{O_5} \to 4N{O_2} + {O_2}$, and follows first order kinetics, hence
→
The major product obtained from $E _{2}$ $-$elimination of $3$ $-$bromo$-$ $2-$fluoropentane is
→
When $0.1\, mole$ of $CoCl_3(NH_3)_5$ is treated with excess of $AgNO_3$, $0.2\, mole$ of $AgCl$ are obtained. The conductivity of solution will correspond to
→