2021 · Q23
Which one of the following is the correct reactivity order of metals reacting with dilute HCl?
General KnowledgeChemistry
- AMg > Al > Zn > Fe
- BMg < Al < Zn < Fe
- CMg > Zn > Fe > Al
- DFe > Mg > Al > Zn
Explanation
Reactivity of metals with dilute HCl follows their electropositive character: the more readily a metal loses electrons, the more vigorously it reacts. Magnesium is the most electropositive of the four, followed by aluminium, then zinc, then iron. The correct order is therefore Mg > Al > Zn > Fe.