Question

Arrange the metals in the decreasing order of their reactivity with acids.

• A. Copper
• B. Aluminium
• C. Magnesium
• D. Iron
• E. Gold

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Metals on reaction with acids liberate hydrogen gas. Based upon the reactivity series, as we move down, the reactivity of the metals decreases.
Hence, order of reactivity is
Magnesium > Aluminium > Iron > Copper > Gold