nursing AIIMS BSc Nursing 2025 Mock Test Series Chemistry Redox Reactions Oxidation Number And Oxidation State
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?
1
The oxidation number of hydrogen is always +1.
2
The algebraic sum of all the oxidation numbers in a compound is zero.
3
An element in the free or the uncombined state bears oxidation number zero.
4
In all its compounds, the oxidation number of fluorine is – 1.