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Consider the following statements:

1. Coal ash contains arsenic, lead and mercury.
2. Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the encironment.
3. High ash content is observed in Indian coal.

Which of the statement given above is/are correct?

(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3



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1. Statement 1 is correct. When coal is burned, the ash that is produced contains various elements, including arsenic, lead, and mercury. These elements can be harmful to the environment and human health if not properly managed.

2. Statement 2 is correct. When coal is burned, it releases pollutants such as sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere. These pollutants contribute to air pollution and can have adverse effects on human health and the environment.

3. Statement 3 is correct. Indian coal generally has a higher ash content compared to coal from other countries. The ash content in coal affects its quality and combustion efficiency.


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