For the reaction: — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$Mn(+4 \rightarrow +2)$ is reduced (oxidizing agent). $Cl(-1 \rightarrow 0)$ is oxidized (reducing agent). 1 mole $MnO_2$ gives 1 mole $Cl_2$ (22.4 L). Molar mass $MnO_2 = 87$ g; $4 \times HCl = 4 \times 36.5 = 146$ g.