Question

The pH range most conducive to the life of freshwater 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

The correct option is A

$6.5–7.5$

The explanation for the correct option

(A)$6.5–7.5$

pH

• The pH is a measure of the concentration of hydrogen ions.
• The pH of a neutral solution is 7.
• Values less than 7 on the pH scale represent an acidic solution.
• Values above 7 on the pH scale represent the basic solution.

pH range most conducive to the life of freshwater plants and animals

• Only a narrow range of pH variation changes allows a living organism to survive.
• A pH within a range of $6.5–7.5$ is ideal and conducive for most organisms.

The explanation for the incorrect option

The pH range most conducive to the life of freshwater plants and animals is $6.5–7.5$. Hence, (B), (C), and (D) are incorrect.

So, option (A) is correct. The pH range most conducive to the life of freshwater plants and animals is$6.5–7.5$.