Question

Which of the following metals reacts with steam or acids to release Hydrogen?

• A. Zinc $\left(\mathrm{Zn}\right)$
• B. Platinum(Pt)
• C. Silver(Ag)
• D. Gold(Au)

Answer 1

The correct option is A

Zinc $\left(\mathrm{Zn}\right)$

The reaction of metals with Steam: When steam is passed over heated Magnesium, Aluminium, Zinc, and Iron, Hydrogen gas is produced along with the corresponding metal oxides.

• The reaction of Zinc with Steam: When steam is passed over heated Zinc produces Hydrogen$\left({\mathrm{H}}_2\right)$ gas along with the Zinc oxides$\left(\mathrm{ZnO}\right)$.

$$\begin{gathered} \mathrm{Zn}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to \mathrm{ZnO}\left(\mathrm{s}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right) \\ \mathrm{Zinc}\mathrm{Steam}\mathrm{Zinc}\mathrm{oxide}\mathrm{Hydrogen} \end{gathered}$$

• The reaction of Zinc with Sulphuric acid: When Zinc reacts with diluted Sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ produces Hydrogen$\left({\mathrm{H}}_2\right)$ gas along with the Zinc sulphate $\left({\mathrm{ZnSO}}_4\right)$.

$$\begin{gathered} \mathrm{Zn}\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{ZnSO}}_4\left(\mathrm{aq}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right) \\ \mathrm{Zinc}\mathrm{dil}.\mathrm{Sulphuric}\mathrm{acid}\mathrm{Zinc}\mathrm{sulphate}\mathrm{Hydrogen} \end{gathered}$$

Therefore metal $\mathrm{Zn}$ reacts with steam or acids to release Hydrogen gas.