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?

Question

ObjectiveMcq · Accepted Answer

The oxidation number of hydrogen is always +1.

ObjectiveMcq · Answer

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

ObjectiveMcq · Answer

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

ObjectiveMcq · Answer

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