Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2023
Exam
NEET
Year
2023
Subject
Botany
Chapter
Environmental Issues

NEET 2023 · Botany · Environmental Issues

What will happen if fresh water lake gets contaminated by addition...

What will happen if fresh water lake gets contaminated by addition of polluted water with high BOD?

Options

  1. ANumber of submerged aquatic plants in the lake will increase
  2. BNumber of aquatic animals in the lake will increase
  3. CAmount of dissolved oxygen in the lake will decrease
  4. DThe lake will remain unaffected

Correct answer

C. Amount of dissolved oxygen in the lake will decrease

Step-by-step solution

Higher BOD of water indicates higher amount of biodegradable organic materials present in it. Since BOD is inversely proportional to the dissolved oxygen (DO), therefore, the dissolved oxygen in the lake will decrease.
Practice Environmental Issues on Quantrex Academy →

More from Environmental Issues

Nitrates and phosphates flowing from agricultural farms into water bodies are a… NEET 2023Match List-I with List-II Choose the correct answer from the option given below: NEET 2023Select the correct statements regarding dissolved Oxygen and Biochemical oxygen demand.… NEET 2023The thickness of ozone in a column of air in the atmosphere is measured in terms of: NEET 2023Which one of the following statements is NOT correct? NEET 2023Given below are two statements: Statement I: Electrostatic precipitator is most widely… NEET 2023Which of the following statements is correct? NEET 2023Why CNG is considered better fuel than diesel? (a) It can not be adulterated (b) It takes… NEET 2022 Full Environmental Issues list All NEET PYQs