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With reference to Eutrophication, which of the following statement(s) is/are correct? 1. It decreases dissolved oxygen of water. 2. It is a phenomenon of nutrient enrichment of a water body. Select the correct answer from the codes given below:

With reference to Eutrophication, which of the following statement(s) is/are correct? 1. It decreases dissolved oxygen of water. 2. It is a phenomenon of nutrient enrichment of a water body. Select the correct answer from the codes given below: Correct Answer Both 1 and 2

The correct answer is Both 1 and 2.

  Important Points

  • Eutrophication is an enrichment of water by nutrient salts such as nitrates and phosphates, through fertilizers or sewage, to a freshwater system.
  • Eutrophication leads to algal blooms causing the bacteria population to increase and use up all oxygen by consuming the dead algae.
  • This creates a condition of hypoxia (situation of less supply of oxygen) which is not suitable for the growth of other aquatic organisms. Hence, statement 1 is correct.
  • When water bodies are overly enriched with nutrients, the growth of algae, plankton, and other simple plant life is favored over the growth of more complex plant life. Hence, statement 2 is also correct.

Related Questions

With reference to Eutrophication, which of the following statements is/are correct? 1.It is a phenomenon of nutrient enrichment of a water body. 2. It depletes dissolved oxygen from the water. Select the correct answer using the codes given below :
With reference to Eutrophication, which of the following statements is/are correct?
1. It is a phenomenon of nutrient enrichment of a water body.
2. It depletes dissolved oxygen of the water.
Select the correct answer:
Statements about Eutrophication : (a) The eutrophication occurs in the lotic water body primarily in the hilly regions. (b)  The eutrophication occurs in lentic water and there is a gradual accumulation of organism and their products. (c) Eutrophication promotes fish growth as algal blooms serve as a source of food for fishes. (d) The eutrophicated water is oxygen-rich and safe for human consumption without treatment. Which is /are the correct statement(s) ?
Consider the following facts related to eutrophication 1. Oxygen demand in water increases in the process of eutrophication. 2. The quantity of oxygen dissolved in water increases in the process of eutrophication. Which of the above statements is/are correct?
Which of the following statements is/are correct? 1. Eutrophication is the natural ageing of a lake by nutrient enrichment of its water. 2. The prime contaminants are nitrates and phosphates, which act as plant nutrients. Select the correct answer using the code given below.
Mine water flowing at 1.5 m3/s with 2 mg/l dissolved oxygen, joins riverwater flowing at 7 m3/s containing 6 mg/l dissolved oxygen. The saturated value of the dissolved oxygen in the mixture is given to be 9.3 mg/l. On the basis, the initial oxygen deficit of the mixture in mg/l is
Eutrophication in a water body leads to which of the following? A. Bloom of algae B. Increase in the level of dissolved oxygen (DO) C. Increase in turbidity and odor of the water body D. Difficulty in sustaining normal aquatic life E. Deficiency of nutrients Choose the correct answer from the options given below:
In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The KLa for such a system will be (KLa = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)
Which of the following statements is correct regarding the oxidation number of Oxygen? I. The oxidation number of Oxygen in most compounds is -2. II. When Oxygen is bonded to Fluorine in compounds like Oxygen difluoride and Dioxygen diflouride, the Oxygen is assigned an oxidation number of +2 and +2 respectively. III. In peroxide, an Oxygen atom is assigned an oxidation number of -1 and in Superoxide, each oxygen atom is assigned an oxidation number of -1/2.
Hot water discharged by industries is considered as a water pollutant because 1. Higher water temperature generally decreases the level of dissolved oxygen of water. 2. High temperature limits oxygen dispersion into deeper waters, contributing to anaerobic conditions in deep water. Which of the following statements give above is/are correct.