Final answer:
Sulfuric acid is the leading chemical product of US industry by production volume, used extensively in the manufacture of fertilizers and a range of chemical products. Option 4
Step-by-step explanation:
The leading chemical product of the US industry according to production volume is sulfuric acid. Sulfuric acid is a commodity chemical critical to a wide array of industrial processes and products. Its production is a good indicator of a nation's industrial strength.
It's used in the manufacture of fertilizers, chemical products like detergents, synthetic resins, dyestuffs, and in processes such as oil well acidizing and aluminium reduction, among others. Large quantities of sulfuric acid are produced annually, signifying its key role in various industrial applications.
Although ammonia is also a significant chemical in terms of volume produced and has various industrial applications including fertilizers, plastics, dyes, and explosives, it is not the most produced chemical when compared to sulfuric acid.
Ammonia is synthesized using hydrogen, and a substantial portion of the world's hydrogen production is devoted to its manufacture. However, the highest production volume in the US chemical industry belongs to sulfuric acid. Option 4