Question:
What is B.O.D.
What is B.O.D.
Updated On: Jun 23, 2024
- The amount of O2 utilised by organisms in water
- The amount of O2 utilized by micro organisms for decomposition
- The total amount of O2 present in water
- All of the above
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
B.O.D. stands for Biological Oxygen Demand, and it is a measure of the amount of oxygen that microorganisms in water consume while decomposing organic matter. B.O.D. is a key indicator of water quality and pollution levels in aquatic ecosystems. Therefore, the correct option is (B): The amount of O2 utilized by microorganisms for decomposition
Was this answer helpful?
0
0
Top Questions on Environmental Issues
- Explain green house effect with reference to gases responsible for it and their sources.
- Maharashtra Class XII - 2025
- Biology
- Environmental Issues
- Mention any four sources of noise pollution.
- Bihar Board XII - 2025
- Geography
- Environmental Issues
- What do you understand by ground water? Describe the causes for its depletion and remedies.
- Bihar Board XII - 2025
- Biology
- Environmental Issues
- Mention any two harmful effects of sewage.
- Bihar Board XII - 2025
- Biology
- Environmental Issues
- Which of the following is most harmful to the ozone layer?
- Bihar Board XII - 2025
- Biology
- Environmental Issues
View More Questions
Questions Asked in NEET exam
The output (Y) of the given logic implementation is similar to the output of an/a …………. gate.
- NEET (UG) - 2025
- Logic gates
- Two identical point masses P and Q, suspended from two separate massless springs of spring constants \(k_1\) and \(k_2\), respectively, oscillate vertically. If their maximum velocities are the same, the ratio of the amplitude of P to the amplitude of Q is :
- NEET (UG) - 2025
- Waves and Oscillations
- A particle of mass \(m\) is moving around the origin with a constant speed \(v\) along a circular path of radius \(R\). When the particle is at \( (0, R) \), its velocity is \( \mathbf{v} = -v \hat{\mathbf{i}} \). The angular momentum of the particle with respect to the origin is :
- NEET (UG) - 2025
- The Angular Momentum
- The radius of Martian orbit around the Sun is about 1.5 times the radius of the orbit of Mercury. The Martian year is 687 Earth days. Then which of the following is the length of 1 year on Mercury?
- NEET (UG) - 2025
- Kepler’s laws
- A balloon is made of a material of surface tension S and has a small outlet. It is filled with air of density \( \rho \). Initially the balloon is a sphere of radius R. When the gas is allowed to flow out slowly at a constant rate, its radius shrinks as \( r(t) \). Assume that the pressure inside the balloon is \( P(r) \) and is more than the outside pressure (\( P_0 \)) by an amount proportional to the surface tension and inversely proportional to the radius. The balloon bursts when its radius reaches \( r_0 \). Then the speed of gas coming out of the balloon at \( r = R \) is :
- NEET (UG) - 2025
- Surface Tension
View More Questions
Concepts Used:
Water Pollution
- Water pollution means the contamination of water bodies such as seas, lakes, rivers, aquifers, oceans, and groundwater caused majorly due to inhuman activities with industrial and agricultural effluents. It is the change of chemical, biological, or physical properties of water that will result in a destructive consequence for living organisms.
- Portable water is considered safe for human and animal consumption as well as used for drinking, cooking, crop irrigation, washing, etc,. Nowadays, chemicals, bacteria, and other pollutants are also influencing this. It adversely acts on all the living forms, directly or indirectly depending upon the source. The effects of water pollution can be felt for years to come.
Sources of Water Pollution:
The following are the major sources of Water Pollution:
- Domestic Waste
- Urbanization
- Deforestation
- Industrial effluents
- Social and Religious Practices
- Insecticides and pesticides
- Detergents and Fertilizers