Question

state one example of chemical reaction characterised by change in colour

Answer 1

Hey mate,

Fe+CuSO4——>FeSO4+Cu

and the colour of the solution changes from blue to green.

HOPE IT HELPS:-))

Answer 2

Reaction of Lead Nitrate solution & Potassium Iodide Solution

Pb(NO₃)₂ [aq] + 2KI    -------> PbI₂(s)  +  2KNO₃(aq)

Colour changes from colourless to yellow.

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