Question

Nitric acid is a strong oxidizing agent.
A. True
B. False

Answer 1

Hint: Oxidising agents are those chemical species that tend to oxidize other substances. During the oxidation of any substance, there is an increase in the oxidation state of the substance by making it lose electrons.

Complete step by step answer:
The oxidation state of an atom is an important factor in deciding whether the element will work as an oxidation agent or reducing agent. In the case of Nitric acid ($HN{O}_3$), the nitrogen has a +5 oxidation state, which is its highest oxidation state, so it will get reduced and oxidize other molecules. Hence it acts as an oxidizing agent.
Also, Nitric acid ($HN{O}_3$) on heating decomposes to give nascent oxygen which is highly reactive and adds to the oxidizing character of the acid. Hence it is a strong oxidizing agent.

So, the statement is true.

Additional Information:
Nitric Acid when mixed with $HCl$ in 1:1 ratio, we get aqua-regia that can dissolve all metals including gold. Also Nitric acid can easily dissolve copper and zinc. In a 20-30% concentrator it acts as a passivator, that is it makes an inert layer over iron or aluminium. Also, it reacts explosively with acetone and very vigorously with ethanol.

Note: Unlike other acids, Nitric acid does not liberate hydrogen when reacted with metals, as the hydrogen obtained during the reaction of nitric acid with water gets oxidized to water by the nascent oxygen obtained. Also, the oxidizing action of nitric acid is highly vigorous and it easily oxidizes metals, non-metals, organic and inorganic compounds.