Compounds of tin, mercury, arsenic, and copper are no longer used to prevent microbial growth in cooling water primarily because
A) antibiotics are cheaper.
B) other chemicals were shown to be much more effective.
C) microbes developed resistance to these metals.
D) their use contributes to serious pollution of natural waters.
E) All of the answer choices are correct.

Question

Quizplus · Accepted Answer

The use of compounds of tin, mercury, arsenic, and copper contribute to serious pollution of natural waters, and therefore, they are no longer used to prevent microbial growth in cooling water. While antibiotic use may be cheaper, other chemicals were not necessarily shown to be more effective, and microbes developing resistance to these metals may also be a problem.

Compounds of Tin, Mercury, Arsenic, and Copper Are No Longer