Question

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1. the most, and, chlorine, is, most, of, common, the halogens, important.
2. the atmosphere, the richer, oxygen, is, in, combustion, the quicker, occur, may, process.
3. is, the speed, the second, of, factor, burning, the flammability, determining, the material, of.
4. are, of, class B, a liquid, fires, or, fires, solid, a liquefiable.

Answer 1

1. Chlorine is the most common and most common of the halogens.
2. The richer is the atmosphere in oxygen the quicker combustion process may occur.
3. The flammability of the material is the second factor determining the speed of burning.
4. Class B fires are fires of a liquid or a liquefiable solid.