The oxidation number of

The possible oxidation number of As are :

The oxidation number is changed in which of the following case?

Which of the following statements is correct regarding redox reactions ? (A)An increase in oxidation number of an element is called reduction (B)A decrease in oxidation number of an element is called oxidation. (C)A reagent which lowers the oxidation number of an element in a given substance is reductant. (D)A reagent which increases the oxidation number of an element in a given substance is reductant

Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. A compound of Xe and F is found to have 53.3% Xe (atomic weight =133). Oxidation number of Xe in this compound is

In which of the following pair oxidation number of Fe is same :-

In which of the following, oxidation number of chloride is +5 ?

In which reaction, there is change in oxidation number of N atom?

In which of the following compounds oxidation number of an element is fractional?

The sum of oxidation numbers of all atoms in an ion is zero.

Assertion: Oxygen atom in both O_(2) and O_(3) has oxidation number zero. Reason: In F_(2)O , oxidation number of O is +2 .