Question

Aviation gasoline has octane numbers of 100 or more.
A. True
B.False

Answer 1

Hint: Octane number expresses the knocking characteristics of petrol. n-heptane (a constituent of petrol) knocks very badly, so its anti-knock value supplied is zero.
The higher the octane number will be, the more compression the fuel will withstand before detonating (igniting) that is fuels with higher octane rating is used in high-performed gasoline engines that require higher compression ratios.

Complete step by step solution:
Aviation gasoline has octane numbers of a hundred or more so the above statement is true.
The main petroleum component used in blending avgas is alkylate, which is composed of a mixture of various iso-octane. All grades of avgas have a density of 6.01 pounds per US gallon (720 g/l) measured at 15 °C.
Avgas (another name is the aviation spirit, used in the UK) is an aviation fuel used in aircraft and aeroplanes with spark-ignited internal combustion engines. Avgas can be distinguished from conventional gasoline (petrol) used in vehicles, which is termed mogas (motor gasoline) in an aviation context. Unlike the motor vehicle gasoline, which is formulated since the 1970s to allow the use of platinum-content catalytic converters to reduce the pollution, the most commonly used grades of avgas which however still consists of some tetraethyllead (TEL), which is a toxic substance and is used to prevent engine knocking (detonation). There are ongoing experiments aimed at eventually reducing or eliminating the use of TEL in aviation gasoline.

Note: Any fueling operation can be very dangerous and not very safe, and aviation operations have characteristics which must be accommodated.