Although aluminium is above hydrogen in the electrochemical series, it is stable in air and water. W — Electrochemistry Chemistry Question

💡 Solution & Explanation

Aluminium initially reacts with oxygen in the air to form a thin, continuous, and highly adherent protective layer of aluminium oxide (Al2O3) on its surface. This passive layer effectively isolates the bulk metal from further contact with air and water, rendering it kinetically stable. Therefore, correct answer is B.