Q. When ${MnO}_{2}$ is fused with KOH, a coloured compound formed, the product and its colour is
A) $K_{2}{MnO}_{4},\ purple\ colour$
B) ${KMnO}_{4},\ purple$
C) ${Mn}_{2}O_{3},brown$
D) ${Mn}_{3}O_{4},black$
Explanation
(a)
$2{MnO}_{2} + 4KOH + O_{2} \longrightarrow 2K_{2}{MnO}_{4} + 2H_{2}O$
purple colour
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.