Two fuels, X and Y, are obtained from crude oil. The molecules in fuel X contain 8 carbon atoms. The molecules in fuel Y contain 20 carbon atoms.
Compare the viscosity and the flammability of fuel X and fuel Y.
Fuel X burns completely in oxygen. Complete the word equation for this reaction.
fuel X + oxygen →\rightarrow→ ...................... + ......................
Suggest one reason why fuel X is used in cars but fuel Y is not.