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Question

When a green salt is heated strongly it's colour finally changes to brown and odour of sulphur is given out.

i) Name the iron salt.

ii) Name the type of reaction that takes place during the heating of iron salt.

iii) Write the chemical equation for the reaction involved.


Solution

1) Ferrous Sulphate

2) Thermal decomposition

3) 2 FeSO4 (s)   Heat → Fe2O3 (s)+ SO2 (g) + SO3 (g)
        Ferrous sulphate            Ferric oxide
       Green Colored                 Reddish brown


Chemistry

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