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Solution


Q.

Complete combustion of hydrocarbons gives:
1 Carbon dioxide and water  
2 Carbon monoxide and water  
3 Carbon monoxide and hydrogen  
4 Carbon dioxide and hydrogen  

Ans.

(1)

Hydrocarbons undergo complete combustion when a sufficient amount of oxygen is available. During the complete combustion of hydrocarbons, carbon dioxide and water are formed.

The equation for the combustion of a hydrocarbon in air can be represented as:

Fuel + Oxygen → Water + Nitrogen + Carbon dioxide

Example:
CH4 + 2O2 → 2H2O + CO2