Choose the factor that increases the BOD of water supply:
Correct answer: A. CO2
- A. CO2
- B. O3
- C. H2O
- D. C2H5OH
Explanation
The correct answer is option A: CO2. When the levels of CO2 increase, it can stimulate bacterial growth, leading to higher BOD values in the water supply. Options B, C, and D are incorrect because ozone (Option B) can actually help reduce organic pollutants, water (Option C) does not directly impact BOD levels, and the impact of ethanol (Option D) on BOD levels is variable depending on concentration and water composition.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Environmental Chemistry
Atmospheric pollution includes smog, acid rain, greenhouse gases, ozone depletion and the effects of carbon monoxide, sulfur oxides, nitrogen oxides and particulate matter. Water pollution covers sewage, industrial waste, eutrophication and treatment stages, while green chemistry focuses on reducing hazardous substances, waste and energy use through safer, more efficient processes.
Practise Environmental Chemistry
221 free Environmental Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Environmental Chemistry questions
Aerobic decomposition of organic matter i.e. glucose by bacteria in water sediments produces?
Chlorofluorocarbons (CFCs) are important compounds that are used as refrigerants but these are also responsible for ozone layer depletion. If a chlorofluorocarbon CFCl3 is present in stratosphere, which of it's reaction intermediates are actually responsible for the breakdown of the ozone molecule?
As a result of increased CO2 in the atmosphere, oceans will become more:
Which oxide is released as a pollutant by vehicles?
Choose the compound that produces toxic effects:
Increased concentration of SO2 and NO2 in the atmosphere causes _.