The sum of the oxidation numbers of all the atoms in a neutral molecule is equal to:
A
zero
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B
one
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C
three
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D
four
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Solution
The correct option is D zero The sum of oxidation number of a neutral compound is zero and the sum of oxidation number in a polyatomic atom is equal to the charge of the atom.
Example:
In HCl the sum of oxidation number of H and Cl is zero.