1.

Explain the difference between oxidation state and valency of an element.

Answer»
Oxidation stateValency
(1)In an atom or ion of a substance, the number of effective charge present on an element is called oxidation state of an element.(1)The valency of an element is a measure of its power with other atoms.
(2)The value of oxidation state may be positive, negative or zero.(2)Valency is always +ve. Inert gases have valency due to complete octet zero.
(3)In covalent compounds, oxidation state of an element is variable(3)In covalent compounds, the valency of an element is generally constant.


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