2006-11-16 17:56:24 · 10 answers · asked by naresh k 1 in Science & Mathematics ➔ Chemistry
Generally, a dye. You need to be more specific. What paper? What colour?
2006-11-17 12:41:36 · answer #1 · answered by beernutuk 3 · 0⤊ 0⤋
Litmus changes colour according to the pH of a substance
2006-11-16 18:16:49 · answer #2 · answered by Daddybear 7 · 0⤊ 0⤋
Titanium chloride, TiCl4, this is why quality paper is sold by weight, the whiter the paper the heavier it is and the more TiCl4 used to dye it and therefore more expense. (sorry that last bit was a bit complex)
2006-11-16 20:32:50 · answer #3 · answered by the_immortal89 2 · 0⤊ 0⤋
Litmus paper changes colour to determinate acidity or base.(red =acid)
2006-11-16 18:14:35 · answer #4 · answered by WISE OWL 7 · 0⤊ 0⤋
Chlorine CL2 is used as the agent for making the paper white.
Will
2006-11-16 19:25:41 · answer #5 · answered by b r 4 · 0⤊ 0⤋
Bleach
2006-11-16 18:03:48 · answer #6 · answered by Anonymous · 0⤊ 0⤋
IN industries sulphur dioxide is used to bleach wood pulp, which is then transformed into WHITE paper.
Potassium manganate(VII) should work. it turns paper brown after some time when exposed to air.
2006-11-16 23:51:48 · answer #7 · answered by Christophe 2 · 0⤊ 0⤋
hydrogen peroxide 35% is used in recycled paper to whiten the color
2006-11-16 18:26:41 · answer #8 · answered by Stonerscientist 2 · 0⤊ 0⤋
p-Dimethylaminoazobenzene sulfonic acid
(Litmus paper)
2006-11-16 18:05:45 · answer #9 · answered by novangelis 7 · 0⤊ 0⤋
im not sure but i'll research it
2006-11-16 18:11:42 · answer #10 · answered by charlie 3 · 0⤊ 0⤋