Define octane number. What are different factors affecting the octane number of a compound.

The octane number is a measure of the resistance of a fuel to knocking or detonation in internal combustion engines. It indicates the ability of a fuel to burn smoothly and evenly in an engine without premature ignition, which can cause engine damage and reduce efficiency.

There are two main types of octane numbers:

1. Research Octane Number (RON): The research octane number is determined under controlled laboratory conditions using a standardized test engine. It measures the fuel's resistance to knocking at low to medium engine speeds and light to moderate engine loads. Fuels with higher RON values __________ _______ ____ _______ ____.
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