Consider the following statements:
- Assertion (A): Coal‑based thermal power stations contribute to acid rain.
- Reason (R): Oxides of carbon are emitted when the coal burns.
Options:
- Both A and R are individually true and R is the correct explanation of A
- Both A and R are individually true but R is NOT the correct explanation of A
- A is true but R is false
- A is false but R is true
Explanation
Option (b) is correct
- Coal-based thermal power stations do contribute to acid rain, making the Assertion correct. Burning coal releases oxides of carbon as well as sulphur dioxide and nitrogen oxides. However, acid rain is mainly caused by sulphur dioxide and nitrogen oxides reacting with atmospheric moisture, not by oxides of carbon. Hence, the Reason is true but not the correct explanation of the Assertion.
Answer: (b) Both A and R are individually true and R is the correct explanation of A
