Which one of the following oxides of nitrogen is known as anhydride of nitric acid ?

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Q: 30 (NDA-I/2016)

Which one of the following oxides of nitrogen is known as ‘anhydride’ of nitric acid ?

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,6,28,6,16,6,6

keywords: 

{'nitric acid': [0, 0, 0, 2], 'nitrogen': [1, 1, 0, 2], 'n2o3': [0, 0, 0, 1], 'n2o5': [0, 0, 0, 1], 'n2o': [0, 0, 0, 2], 'no2': [0, 0, 1, 3], 'anhydride': [0, 0, 0, 1], 'oxides': [0, 0, 3, 11]}

The oxide of nitrogen that is known as the `anhydride` of nitric acid is option 4, n2o5.

To understand why n2o5 is considered the anhydride of nitric acid, we need to know what an anhydride is. An anhydride is a compound formed by removing water from another compound. In the case of n2o5, it is formed by removing water (H2O) from nitric acid (HNO3).

The chemical formula for nitric acid is HNO3, which consists of one hydrogen atom (H), one nitrogen atom (N), and three oxygen atoms (O). When two molecules of nitric acid come together and lose a molecule of water, it forms n2o5.

When n2o5 comes into contact with water, it reacts to form nitric acid again. This property of n2o5 as a strong dehydrating agent makes it known as the anhydride of nitric acid.

In summary, n2o5 is known as the anhydride of nitric acid because it is formed by the removal of water from nitric acid, and it can readily react with water to reform