Chemistry-Oxidation Number
NEET Chemistry Oxidation Number MCQ Question
Type: MCQ-conceptual-Hard-Class 11
Which of the following statements about oxidation numbers is correct?
A
The oxidation number of all elements in a compound must sum to zero.
B
Nonmetallic elements can only have negative oxidation numbers.
C
The oxidation number of an atom in a polyatomic ion must equal the charge of the ion.
D
Transition metals always exhibit a single positive oxidation state.
Correct Answer
Option A
Detailed Explanation
According to the NCERT context, the oxidation number of all the atoms in a compound must be zero, while in a polyatomic ion, the algebraic sum of the oxidation numbers must equal the charge on the ion.
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