Question

Eutrophication is considered bad for a water body because it leads to
(1) increase in demand for carbon dioxide
(2) increase in demand for oxygen
(3) increase in demand for nitrogen
(d) change in pH of a water body​

Answer 1

Answer:

(1) increase in demand for carbon dioxide

Answer 2

‘Eutrophication’ is considered ‘bad for water body’ because it leads to ‘increase in demand for oxygen’.

Option: (2)

Explanation:

• Eutrophication is a process that is characterised by excessive algal growths that happen in a ‘water body’.  

• This occurs due to the increased ‘production of organic matter’ due to increased pollution rates.  

• This leads to overuse of oxygen due to these organisms and thereby causes an increased BOD of the entire system, thus reducing its quality.

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