Question

Which of the following imparts purple colour to glass?

• A. ${Cr}_2{O}_3$
• B. $Au{Cl}_3$
• C. ${Cu}_{2}O$
• D. $Mn{O}_2$

Answer 1

The correct option is D $Mn{O}_2$

$Mn{O}_2$which is black, is used to remove the green color from the glass and imparts purple tint to the glass. $C{r}_2{O}_3$ imparts dark green colour, $C{u}_{2}O$ produces a turquoise color, and $AuC{l}_3$ gives ruby red coloured glass.