STANDARDChemistry-Redox Reactions
STANDARD Chemistry Oxidation States MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which of the following is a decreasing order of oxidation states of the central atoms?
A
PCl₅, HIO₄, Cr₂O₇²⁻, CO₂
B
Cr₂O₇²⁻, CO₂, HIO₄, PCl₅
C
HIO₄, Cr₂O₇²⁻, PCl₅, CO₂
D
Cr₂O₇²⁻, HIO₄, CO₂, PCl₅
Correct Answer
Option C
Detailed Explanation
The oxidation states are: HIO₄ (+7), Cr₂O₇²⁻ (+6), PCl₅ (+5), CO₂ (+4). Thus, the order is HIO₄, Cr₂O₇²⁻, PCl₅, CO₂.
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