The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following is incorrect in this respect ?

The oxidation number of an element in a compound is evaluated on the b

1.	The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following is incorrect in this respect ?
Answer» The OXIDATION number of hydrogen is always +1. The algebraic sum of the all the oxidation numbers in a COMPOUND is zero. An ELEMENT in the free or the uncombined state bears oxidation number zero. In all its compounds, the oxidation number of fluorine is -1. Solution :Because oxidation number in hydride compound will be (-1) and oxidation number of `H_(2)` will be zero.