Answer :

(a) Decomposition of ferrous sulphate is an endothermic reaction because heat is absorbed from the environment during the reaction.


(b) Dilution of sulphuric acid is an exothermic reaction because heat is released into the environment during the reaction.


(c) Dissolution of sodium hydroxide in water is an exothermic reaction because heat is released into the environment during the reaction.in water.


(d) Dissolution of ammonium chloride in water is an endothermic reaction because heat is absorbed from the environment during the reaction.


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