Air Pollution

Environment and Ecology

Title

45:30

Video Progress

8 of 24 completed

Notes Progress

5 of 15 completed

MCQs Progress

38 of 100 completed

Subjective Progress

8 of 20 completed

Continue to Next Topic

Indian Economy - Understanding the basics of Indian economic system

Download Solution PDF

Consider the following statements :

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

Which of the statements given above is/are correct ?

This questions was previously asked in

UPSC CSP Previous Year Paper (2020)

Download PDF Appear Online

View All IAS Previous Year Papers

1 only

2 and 3 only

3 only

1, 2 and 3

Explanation:

Statement 1 is correct: Constituents that are found at various concentrations in coal ash are arsenic, cadmium, chromium, cobalt, copper, lead, lithium, mercury, molybdenum, selenium, thallium and uranium.
Statement 2 is correct: Coal fired power plants lead to significant emissions of particulate matter (PM), sulfur dioxide, nitrogen oxides, carbon monoxide, volatile organic compounds, and carbon dioxide.
Statement 3 is correct: Ash content of coal produced in the country is generally 25 to 45 % whereas average ash content of imported coal varies from 10 to 20 %. Indian Coal has comparatively higher ash content than imported coal due to drift theory of formation of coal deposits in India.

Hence option 4th is correct.

Profile ResourcesReport error