An imbalance of which two substances causes the eutrophication of waterways?
(A) H⁺ and OH⁻
(B) Mg²⁺ and Ca²⁺
(C) Oxygen and ozone
(D) Phosphorus and nitrogen - HSC - SSCE Chemistry - Question 5 - 2010 - Paper 1
Question 5
An imbalance of which two substances causes the eutrophication of waterways?
(A) H⁺ and OH⁻
(B) Mg²⁺ and Ca²⁺
(C) Oxygen and ozone
(D) Phosphorus and nitrogen
Worked Solution & Example Answer:An imbalance of which two substances causes the eutrophication of waterways?
(A) H⁺ and OH⁻
(B) Mg²⁺ and Ca²⁺
(C) Oxygen and ozone
(D) Phosphorus and nitrogen - HSC - SSCE Chemistry - Question 5 - 2010 - Paper 1
Step 1
Identify the substances related to eutrophication
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Answer
Eutrophication is primarily caused by the excess nutrients in aquatic systems, particularly phosphorus and nitrogen. These nutrients lead to excessive growth of algae, which can deplete oxygen in the water and harm aquatic life.
Step 2
Select the correct answer
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Answer
The correct answer is (D) Phosphorus and nitrogen.
