Statements:
'A': Carbon dioxide is not always a pollutant.
'R': Plants require carbon monoxide for growth that they get from carbon dioxide.
Analyzing Assertion A: Carbon Dioxide Status
The statement 'A' claims that Carbon dioxide ($CO_2$) is not always a pollutant. Carbon dioxide is a natural component of Earth's atmosphere and is essential for plant life through photosynthesis. While excessive concentrations contribute to climate change, it is not universally classified as a pollutant in all contexts, especially at natural levels. Therefore, statement 'A' is considered true.
Evaluating Reason R: Plant Needs
The statement 'R' asserts that plants require Carbon monoxide ($CO$) for growth and obtain it from Carbon dioxide ($CO_2$). This is incorrect. Plants require Carbon dioxide ($CO_2$) for photosynthesis, the process of creating their food. Carbon monoxide ($CO$) is a toxic gas and is not required by plants for growth. Plants do not 'get' $CO_2$ from $CO$. Thus, statement 'R' is false.
Conclusion on Statements
Based on the analysis:
- Assertion 'A' is true.
- Reason 'R' is false.
This corresponds to the option where statement 'A' is true, and statement 'R' is false.
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Important Questions from Environmental pollution
Photochemical smog is a resultant of the reaction among
Which of the following is NOT responsible for the degradation of our environment?
With reference to furnace oil, consider the following statements:
1. It is a product of oil refineries.
2. Some industries use it to generate power.
3. Its use causes sulphur emissions into environment.
Which of the statements given above are correct?
Why is there a concern about copper smelting plants?
1. They may release lethal quantities of carbon monoxide into environment.
2. The copper slag can cause the leaching of some heavy metals into the environment.
3. They may release sulphur dioxide as a pollutant.
Select the correct answer using the code given below.
Magnetite particles, suspected to cause neurodegenerative problems are generated as environmental pollutants from which of the following?
1. Brakes of motor vehicles
2. Engines of motor vehicles
3. Microwave ‘Stoves within homes
4. Power plants
5. Telephone lines
Select the correct answer using the code given below.
