Why is CNG (Compressed Natural Gas) preferred over petrol?
(a) Burns most efficiently
(b) It is expensive
(c) Burns less efficiently
(d) Can be adulterated
The question was asked in exam.
My enquiry is from Environmental Issues topic in portion Environmental Issues of Biology – Class 12
Correct option is (a) Burns most efficiently
Easy explanation: CNG (Compressed Natural Gas) preferred over petrol to reduce air pollution. This is because CNG burns most efficiently and very little of it is left unburnt. It is cheaper than petrol and cannot be easily adulterated.