1. (a) RON (Research octane number) refers to the auto-ignition tendency for a fuel. The lower the octane number the more likely the fuel is to auto-ignite under compression. Aromatic compounds such as methylbenzene have a higher octane rating than 100 as they are less likely to auto-ignite under compression than 2,2,4-trimethylpentane, i.e. they are less likely to cause ‘knocking’.(b) Octane number = (87/100 x 100)...