Question

Nitric acid does not react with:

• A. Zinc
• B. Iron
• C. Copper
• D. Magnesium

Answer 1

The correct option is D

Magnesium

Electrochemical Series:-

1. This is also referred to as the activity series which will describe the arrangement of all the elements which are arranged in the increasing order of the electrode potential values.
2. Nitric acid (${\mathrm{HNO}}_3$) will not react with Magnesium ($\mathrm{Mg}$) as because this Nitric acid will react only with the metals that are present there above the Hydrogen in the reactivity series of the element.
3. So here, Magnesium metal will react with the dilute Nitric acid for the formation of the Magnesium nitrate and the Hydrogen gas.
4. Reaction involved:- $\underset{\mathrm{Magnesium}}{{\mathrm{Mg}}_{\left(\mathrm{s}\right)}}+\hspace{0.17em}\underset{\mathrm{Nitric}\mathrm{acid}}{4{\mathrm{HNO}}_{3\left(\mathrm{aq}\right)}}\to \underset{\mathrm{Magnesium}\mathrm{nitrate}}{\mathrm{Mg}{\left({\mathrm{NO}}_3\right)}_{2\left(\mathrm{aq}\right)}}+\underset{\mathrm{Nitrogen}\mathrm{dioxide}}{2{\mathrm{NO}}_{2\left(\mathrm{g}\right)}}+\underset{\mathrm{Water}}{{\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{l}\right)}}$

Therefore, the correct answer is (D):- Magnesium.