Question

Question 6
The pH range most conducive for life of fresh water plants and animals is

(a) 6.5 – 7.5
(b) 2.0 – 3.5
(c) 3.5 – 5.0
(d) 9.0 – 10.5

Answer 1

Option (a) is correct.
pH range below 7 is acidic and above 7 is alkaline. So, the range 6.5 - 7.5 is neutral and most conducive for life of fresh water plants and animals.