what common compund would react with blackened paint by h2s to give original colour

It is always advised to store hydrogen peroxide in dark colouredbottles. Why?

What should you do to attain the proper mixture of the paint?

what had happen when the following were applied: Dye, Mordant, Decoloriser, Counter stain?

Watercolor isGroup of answer choicesthe most common paint used by professional painters in the modern agewater soluble and translucentmade from different kinds of waterimpossible to wash out of clothes

Explain the color reaction of ferric chloride and phenols.