Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Acidity in water with pH level above 5 has detrimental effect on aquatic life.

Reason (R): Water with pH value between 5 to less than 7 is of acidic nature.

In light of the above statements, choose the correct answer from the options given below:

The correct answer is (A) is false but (R) is true..
Key Points

Assertion (A): Acidity in water with pH level above 5 has detrimental effect on aquatic life.

• In general, water with a pH level above 5 is considered to be relatively safe for aquatic life.
• The pH scale ranges from 0 to 14, with a pH of 7 considered neutral.
• Values below 7 indicate acidity, while values above 7 indicate alkalinity.
• Aquatic organisms have varying tolerances to pH levels depending on the species and their natural habitat.
• However, most freshwater aquatic life can tolerate a pH range of 6 to 9. 

Hence, the assertion is incorrect.

Reason (R): Water with pH value between 5 to less than 7 is of acidic nature.

• Reason (R) states that water with a pH value between 5 to less than 7 is of acidic nature.
• This statement is also true because a pH of 7 is considered neutral, and any value below 7 is considered acidic.
• A pH of 5 is moderately acidic and can have a detrimental effect on aquatic life, as stated in Assertion (A).

Therefore, (A) is false but (R) is true.