Question

Nitric acid cannot be used to yield Hydrogen gas from a metal because;

A. Nitric Acid acts as solvent for metals.

B. Nitric acid is highly corrosive

C. Nitric acid reduces the gas evolved.

D. Nitric acid is a strong oxidizing agent.

Answer 1

Answer:

D) Nitric acid is a strong oxidizing agent.

Answer 2

D. Nitric acid is a strong oxidizing agent.

Nitric acid is a powerful oxidizing agent. It converts the Dihydrogen Gas produced during the metal reaction to Water. As a result, Nitric Acid cannot be used to produce hydrogen gas.

Metals such as magnesium and manganese, on the other hand, continue to produce hydrogen gas, albeit with very dilute nitric acid. Nitrogen gas is produced when 1% dilute and cold nitric acid reacts with magnesium and manganese.

• Because Nitric acid is a strong oxidizing agent, no hydrogen gas is produced when a reaction between metal and Nitric acid (HNO3) occurs.

• The hydrogen gas produced during the metal reaction is oxidized to H2O, so no hydrogen gas is produced.

• Instead, it produces nitric oxides such as NO2, NO, and others.

• When a silver metal reacts with nitric acid (HNO3), it produces N2O and H2O.

⇒ $Ag(s) + 2HNO_{3} (l) -- > AgNO_{3} (s) + NO_{2}(g) + H_{2}O(l)$

Hence, hydrogen gas is not evolved when metals react with nitric acid because, Nitric acid is a strong oxidizing agent.

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