Why nitric acid react with metal does not form hydrogen gas?

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Answer

Because nitric acid is a strong oxidizing agent it oxidises the hydrogen into water and self reduced int its oxides such as N2O,NO2 etc

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Because it is a strong oxidizing agent

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Nitiric acid is a strong oxidising agent...

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Because nitrogen gets oxidised to nitrogen dioxide or to nitrogen monoxide

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As soon as hydrogen gas evolved in the reaction between nitric acid and metal then nitric acid oxidises this hydrogen gas into water

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That is because nitric acid is a strong oxidising agent.

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It is a strong oxidising agent .....

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Nitric Acid and Metal Reaction: Lack of Hydrogen Gas Formation

Nitric acid is a strong oxidizing agent that can react with metals. However, unlike other acids, the reaction between nitric acid and metals does not result in the formation of hydrogen gas. This can be attributed to the unique properties of nitric acid and the specific reaction mechanism involved.

1. Oxidizing Nature of Nitric Acid
Nitric acid (HNO3) is a powerful oxidizing agent due to the presence of the nitrate ion (NO3-) in its structure. It readily donates oxygen atoms to other substances, enabling it to oxidize various compounds. In the case of metals, the nitrate ion acts as an oxidizing agent rather than a proton donor.

2. Acid-Base Reaction with Metal
When nitric acid reacts with metals, it undergoes a redox (reduction-oxidation) reaction. The metal is oxidized while the nitrate ion is reduced. The overall reaction can be represented by the following general equation:

2HNO3 + M → M(NO3)2 + H2O

Here, M represents the metal being reacted with nitric acid. The nitrate ion is formed as a product along with water. It is important to note that the reaction does not involve the liberation of hydrogen gas.

3. Formation of Nitrogen Oxides
One of the key factors that prevents the formation of hydrogen gas in the reaction between nitric acid and metals is the formation of nitrogen oxides. Nitric acid is a strong oxidizing agent and can easily oxidize the metal being reacted with it. As a result, nitrogen oxides such as nitrogen dioxide (NO2) and nitric oxide (NO) are formed.

4. Role of Nitrogen Oxides
The nitrogen oxides formed during the reaction act as intermediates. They further react with water present in the reaction mixture to form nitric acid and nitrous acid. These acids can then react with the metal to form metal nitrates.

5. Inhibition of Hydrogen Gas Formation
The presence of nitrogen oxides and the subsequent formation of nitric acid and nitrous acid prevent the liberation of hydrogen gas. Instead, the reaction yields metal nitrates as the products. The lack of hydrogen gas formation in the reaction between nitric acid and metals is a distinctive characteristic of nitric acid as an oxidizing agent.

In summary, the absence of hydrogen gas formation in the reaction between nitric acid and metals can be attributed to the strong oxidizing nature of nitric acid, which leads to the formation of nitrogen oxides. These nitrogen oxides act as intermediates, resulting in the formation of nitric acid and nitrous acid, which react further with the metal to form metal nitrates.

Similar Class 10 Doubts

Hydrogen gas is not produce when metal react with nitric acid. Why?

Hydrogen gas is not evolved when metals react with

Which of the following statement is not correct?

y nitric acid reacts only with magnesium and manganese to produce hydrogen gas...it doesn't react like this with another metal ....I mean it doesn't produce H2 while react with other metals????

Why magnesium and manganese react with very dilute HNO3 to evolve H2 gas whereas other metals doesnt react with nitric acid and form hydrogen gas as it is a strong oxidising agent?

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