Q. 54.4( 10 Votes )

When dilute sulphuric acid is added to pieces of iron sulphide, hydrogen sulphide gas is produced and soluble ferrous sulphate is formed. The type of chemical reaction involved is
A. decomposition reaction

B. combination reaction

C. displacement reaction

D. double displacement reaction

Answer :

Dilute sulphuric acid: dil. H2SO4


Iron sulphide: FeS


Hydrogen sulphide: H2S


Ferrous sulphate: FeSO4


The reaction involved can be written as:


FeS + H2SO4 FeSO4 + H2S


We can see that there is the exchange of SO42- and S2- ions in the reactants. Thus it is a double displacement reaction.

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