10) A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest reasons for the fish kill.

10) A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest  reasons for the fish kill. (150 Words)

NCERT, Class XI, Chemistry Part – 2, Chapter 7