Which of the following phenomena uniquely demonstrates the high reactivity of nascent hydrogen over — Hydrogen Chemistry Question

💡 Solution & Explanation

Ordinary molecular hydrogen cannot reduce acidified $KMnO_4$ at room temperature. However, nascent hydrogen (produced in situ by the action of $Zn$ on dilute $H_2SO_4$) readily reduces and decolourises the purple $KMnO_4$ solution.