Question : Which of the following is caused by the higher concentration of nitrogen and phosphorus ?
Option 1: Eutrophication
Option 2: Hardness
Option 3: Alkalinity
Option 4: Acidity
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Correct Answer: Eutrophication
Solution : The correct answer is Eutrophication.
Eutrophication is the process of nutrient enrichment of lakes. When the agricultural runoff rich in nitrogen and phosphorous reaches the water body, the nutrient levels in the water suddenly increase. Which leads to greater biological activity by the marine organisms and further increase in biological oxygen demand of the water. It slowly leads to the death of the water body.
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Question : When Lead nitrate is heated, which of the following gases is produced?
Option 1: Nitrogen oxide
Option 2: Lead dioxide
Option 3: Nitrogen dioxide
Option 4: Lead oxide
Question : Which of the following diseases is not caused by a mosquito bite?
Option 1: Elephantiasis
Option 2: Dengue
Option 3: Malaria
Option 4: Hepatitis
Question : Which of the following diseases is caused by the consumption of nitrate contaminated food and water ?
Option 1: Minimata disease
Option 2: Osteoporosis
Option 3: Blue baby syndrome
Option 4: Asbestosis
Question : Which one of the following elements is an example of noble gas?
Option 1: Nitrogen
Option 2: Hydrogen
Option 3: Chlorine
Option 4: Helium
Question : Which of the following metal salts is responsible for permanent hardness in water?
Option 1: KCl
Option 2: Nacl
Option 3: Ca(HCO3)2
Option 4: CaCl2
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