Chemistry-Oxidation Number
NEET Chemistry Oxidation Number MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which of the following statements regarding oxidation numbers is correct?
A
The oxidation state of chromium decreases from +6 to +3 in the reaction involving potassium dichromate.
B
Sulfur in Cu2S acts as an oxidizing agent by increasing its oxidation number.
C
A combination reaction cannot involve elemental forms of both reactants.
D
Cu(I) is a reductant since it helps increase the oxidation number of sulfur in Cu2S.
Correct Answer
Option A
Detailed Explanation
In the context of the reaction involving potassium dichromate, the oxidation state of chromium indeed decreases from +6 to +3, indicating its role as an oxidizing agent. This is consistent with the information provided about redox reactions and oxidation numbers.
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