Question

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

Answer 1

Answer:

A. Burns most efficiently

• 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.