Question

Example of chemical reaction which change colour

Answer 1

place an iron pin in a solution of blue CuSo4 and after some time it changes to pale green.

Fe+CuSo4----->FeSo4+Cu

Answer 2

Heya mate!!

Here's your answer!!

When Lead nitrate is added to potassium iodide, a yellow precipitate of lead iodide is obtained with formation of potassium nitrate.

Pb(NO3)2 + KI ----------> PbI2 + KNO3

Here PbI2 is potassium iodide which is yellow in color.

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