What properties would have caused early researchers to name hydrogen "inflammable air”

It ignited in air to form water

Explanation:

In the experiments of Cavendish, he discovered a gas lighter than air when he added certain metals to dilute acids. The gas when breathed is significantly different from air.

The gas is known to burn in air when it approaches a flame to form water hence the name 'inflammable air' was given to the gas. It was later called hydrogen which means 'water former'.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter