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The oxidation number of an element in a ...

The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following rules is not correct in this respect?

A

The oxidation number of hydrogen is always +1.

B

The algebraic sum of all the oxidation numbers in a compound is zero.

C

An element in the free or the uncombined state bears oxidation number zero.

D

In all its compounds, the oxidation number of fluorine is -1.

Text Solution

Verified by Experts

The correct Answer is:
A
O.N. of hydrogen is not always +1. The O.N. of hydrogen in hydrides is -1 and in `H_2`, it is zero.
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