KCET · Chemistry · Some Basic Concepts of Chemistry
The correct statement is
- A The extent of actinoid contraction is almost the same as lanthanoid contraction.
- B \( C e^{4+} \) in aqueous solution is not known.
- C The earlier members of lanthanoid series resemble calcium in their chemical properties.
- D In general, lanthanoids and actinoids do not show variable oxidation states.
Answer & Solution
Correct Answer
(B) \( C e^{4+} \) in aqueous solution is not known.
Step-by-step Solution
Detailed explanation
Most stable oxidation state for lanthanoid is \( +3 \).
Therefore, \( \mathrm{Ce}^{4+} \) acts as a good oxidizing agent in solution due to ability to get reduced to \( \mathrm{Ce}^{3+} \) easily.
Hence, \( C e^{4+} \) in aqueous solution is not known.
Therefore, \( \mathrm{Ce}^{4+} \) acts as a good oxidizing agent in solution due to ability to get reduced to \( \mathrm{Ce}^{3+} \) easily.
Hence, \( C e^{4+} \) in aqueous solution is not known.
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