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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

1. The oxidation number of hydrogen is always +1.

B

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

C

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

D

4. 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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