Question

When $Mn{O}_2$ is fused with $KOH$, a colored compound is formed. The product and its color is:

• A. $K_{2}Mn{O}_4$, purple green
• B. $KMn{O}_4$, purple
• C. ${Mn}_2{O}_3$, brown
• D. ${Mn}_2{O}_4$, black

Answer 1

The correct option is A $K_{2}Mn{O}_4$, purple green

When $Mn{O}_2$ is fused with $KOH$, a colored compoundof $K_{2}Mn{O}_4$ is formed. The product is in puple green color

$2Mn{O}_2+4KOH+O_2\to 2K_{2}Mn{O}_4+2H_{2}O$.

Hence option A is correct.