state two uses of chemical decomposition reactions in industry.

Dear student ,
(i) it is used in the extractions of metals like K , Na etc
(ii) it also used in calcination of ores to convert the carbonate ore into oxide ore. 
(iii) manufacturing of cement 

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two uses of chemical decomposition reaction in industry are:--

1)Decomposition of calcium carbonate to calcium oxide and carbon dioxide on heating is an important decomposition reaction used in various industries.

2)Decomposition of silver chloride into silver and chlorine by light is used in photography.

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1) manufacturing of cement or calcium oxide

2)for the extraction of metals from its ores
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