Question

In the manufacture of glass, the addition of $Mn{O}_2$ gives:

• A. yellow colour
• B. red colour
• C. violet colour
• D. pink colour

Answer 1

The correct option is C violet colour

Manganese dioxide ($Mn{O}_2$) which is black in color , is used to remove gree color from the glass .

In a very slow process Manganese dioxide is converted into sodium permanganate, a dark purple compound (Violet colour).