Cerium(IV)is a Strong Oxidizing Agent Commonly Used in Redox Titrations

Cerium(IV) is a strong oxidizing agent commonly used in redox titrations.Which of the following is NOT true for cerium(IV) ?

A) Ce⁴⁺ is yellow and Ce³⁺ is colorless.The color change is abrupt enough that Ce⁴⁺ can serve as its own indicator.
B) Reduction of Ce⁴⁺ to Ce³⁺ proceeds cleanly in acidic solutions.
C) Ce⁴⁺ does not form aqueous complexes when dissolved in water.
D) Ce⁴⁺ is indefinitely stable in sulfuric acid solution.
E) Ce⁴⁺ reacts rapidly with chloride in hot hydrochloric acid solutions to form chlorine gas.

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