Although heavy metals are no longer widely used as germicides, __________ is an effective algicide in lakes and swimming pools.
A. lead acetate
B. copper sulfate
C. silver nitrate
D. mercuric chloride
Answer: B
Although heavy metals are no longer widely used as germicides, __________ is an effective algicide in lakes and swimming pools.
A. lead acetate
B. copper sulfate
C. silver nitrate
D. mercuric chloride
Answer: B