Question

give an example of a reaction where colour change is noticed​

Answer 1

Explanation:

Color changes from blue to light green. Copper reacts with oxygen, H2O and CO2 to give copper carbonate, which changes color from brown to blue or blue green. Rusting, blackening of surfaces of cut vegetables and fruits are other examples of change of color in a chemical reaction.

Answer 2

Answer:

Explanation:

carbon dioxide turns lime water milky. this due to the formation of calcium carbonate which is insoluble

Ca(oh)2(aq)+CO3(g)⇒CaCO3(s)+H2O(l)

aq⇔aqriace

g⇔gas

s⇔solid

l⇔liquid