Question

Name a metal which liberates hydrogen gas with 5percent HNO3 write the chemical equation

Answer 1

The metals like Magnesium and Calcium reacts with dil.HNO₃ producing H₂ gas.
Mg + 2HNO₃ → Mg(NO₃)₂ + H₂
Ca + 2HNO₃ → Ca(NO₃)₂ + H₂....

Answer 2

Magnesium metal is the metal which liberates hydrogen gas when treated with$HNO_3.$

Explanation:

• There are many types of metals which are known to liberate the hydrogen gas after reacting with nitric acid and magnesium is just one of them.

• Along with the liberation of the hydrogen, they also liberate a salt of magnesium.

• This is usually the case when the nitric acid used isn't concentrated.

• The reaction with dilute nitric acid or 5% $HNO_3$is given by

        $Mg +2HNO_3 \rightarrow Mg(NO_3)_2+H_2.$

• If the concentrated nitric acid is used in the reaction then instead of liberating Hydrogen gas, the magnesium will react violently and form nitrogen oxides.

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