the calorific value of cng and petrol are 45000kj/kg and 50000kj/kg respectively if you have vehicles which can run on petrol as well as cng which fuel will you prefer and why
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i would prefer cng because it is less polluted fuel it burns completely
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Answer:
CNG because it's don't pollute the environment and it have high calorific value and produces much heat as compared to petrol
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