Question

What is the most suitable pH range for fresh water plants and animals?

• 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 strength of acidic and basic substances is measured with respect to pH scale. The standard value of an acid on a pH scale is between 0 - 7, the substances that are basic have the value ranging between 7 - 14 and for neutral substances the pH is around 7. Since pure water is neither an acid nor a base but neutral, the pH range most suitable can be 6.5 to 7.5.