Give an example of each of the following chemical changes:

(e) A reaction where colour change is noticed

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Solution

When an iron nail is dropped into a blue coloured copper sulphate solution, the blue colour of the solution fades and eventually turns light green due to formation of ferrous sulphate. This chemical change is an example of change in color of reactant.

The chemical equation for the reaction can be given as,
$Fe + {CuSO}_{4} (aq) \to {FeSO}_{4} + Cu$
iron blue green red
solution solution deposit

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Similar questions

Give an example of each of the following chemical changes.

(a) A reaction involving.

(i) Change of state.

(ii) Formation of the precipitate.

(b) An exothermic and an endothermic reaction involving carbon as one of the reactants.

Write the chemical reaction where the following changes are observed.

(a) Gas is evolved

(b) Colour change is noticed

(d) Physical state is changed

Give one example each of which illustrates the following characteristics of a chemical reaction:

(a) Evolution of a gas
(b) Change of colour

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