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Give one method for industrial preparation and one for laboratory preparation of CO and CO2 each. 

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Caron dioxide 

In the laboratory, CO2 can be prepared by the action of dilute hydrochloric acid on calcium carbonate. The reaction involved is as follows: 

CO2 is commercially prepared by heating limestone. The reaction involved is as follows: 

Caron monoxide 

In the laboratory, CO is prepared by the dehydration of formic acid with conc. H2SO4, at 373 K. The reaction involved is as follows: 

CO is commercially prepared by passing steam over hot coke. The reaction involved is as follows: 

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