UPSC CSE Prelims
Question 58
Which of the following are some important pollutants released by steel industry in India?
- Oxides of sulphur
- Oxides of nitrogen
- Carbon monoxide
- Carbon dioxide
Select the correct answer using the code given below.
View correct answer and explanation
Correct answer: D
Correct Option: D
Explanation: Steelmaking uses high-temperature combustion and carbon-intensive chemical processes that can release sulphur oxides, nitrogen oxides, carbon monoxide and carbon dioxide.
Statement/Pair-wise Analysis:
Statement/Item 1: Correct - Sulphur in fuel and raw materials can produce sulphur oxides.
Statement/Item 2: Correct - High-temperature combustion can form nitrogen oxides.
Statement/Item 3: Correct - Incomplete combustion and reduction reactions can generate carbon monoxide.
Statement/Item 4: Correct - Fuel burning and iron-ore reduction release carbon dioxide.
Option-wise Analysis:
A: Incorrect - omits correct statement/item 2.
B: Incorrect - omits correct statement/items 1, 4.
C: Incorrect - omits correct statement/items 2, 3.
D: Correct - includes all and only the correct items.