Biological Oxygen Demand (BOD) is a standard criterion for

[UPSC Civil Services Exam – 2017 Prelims]

(a) Measuring oxygen levels in blood

(b) Computing- oxygen levels in forest ecosystems

(c) Pollution assay in aquatic ecosystems

(d) Assessing oxygen levels in high altitude regions


Answer: (c)        

Explanation:

  • Biochemical oxygen demand (BOD) refers to the quantity of oxygen consumed by aerobic bacteria and other microorganisms while they break down organic matter.
  • In natural bodies of water like lakes and streams, dissolved oxygen (DO) is essential to sustain aquatic life and maintain the water’s quality and appearance.
  • However, environmental pressures and human activities can lead to reduced levels of dissolved oxygen in water bodies.
  • Biological oxygen demand (BOD) is a measure of the oxygen needed to eliminate decomposing organic waste from water through the action of aerobic bacteria.
  • Industries involved in commercial production and manufacturing must establish a program for disposing of or pretreating wastewater to meet BOD limits.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

Read More »

Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

Read More »
Loading...
Left Menu Icon