How many pounds does a 1 ton cylinder of chlorine weigh?

The weight of a 1 ton cylinder of chlorine is correctly identified as 2,000 pounds. This is based on the standard definition of a ton in the United States, where 1 ton equals 2,000 pounds. Therefore, when referring to a 1 ton cylinder of chlorine, it will weigh exactly 2,000 pounds.

The other options may stem from misunderstandings of measurement conversions or the weight of different types of containers or substances, but for a standard ton in the context of chlorine cylinders, 2,000 pounds is the accurate weight.