Question

Different techniques are used for obtaining the metals falling in each category. The metals high up in the reactivity series are obtained by:

• A. reduction with carbon
• B. electrolytic reduction
• C. reduction by heating
• D. displacement reaction

Answer 1

The correct option is B electrolytic reduction

Metals such as sodium, magnesium, calcium, aluminium that are high up in the reactivity series are very reactive and cannot be obtained from their compounds by heating with carbon. This is because oxides of these metals are very stable and cannot be reduced by carbon. So these metals are obtained by electrolytic reduction.