Question

what is flash point? give define

Answer 1

There are 2 Definition of flash point 

1: the lowest temperature at which vapors above a volatile combustible substance ignite in air when exposed to flame

2: a point at which someone or something bursts suddenly into action or being

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Answer 2

The temprature At which a fuel begins to burn is called its flash point.

or

Flash point, the lowest temperature at which a liquid (usually a petroleum product) will form a vapour in the air near its surface that will “flash,” or briefly ignite, on exposure to an open flame.