14. consider the following statement choose the incorrect one (a) some substance on combustion produce heat and flame (b) the amount of heat energy produced on complete combustion of 1 kg of fuel is called its calorific value (c) when CNG burns, it produce harmful products in very small amount (d) none of the above
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Answer:
c
Explanation:
b is correct, a is correct.
CNG doesn't produce harmful chemicals.
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