Paper 1 · Communication
UGC NET June 2024 Re-Exam (28.08.2024) Shift-I
Which of the following are released significantly during the combustion of coal? Choose the correct answer from the options given below.
- 1. Soot
- 2. Sulphate
- 3. Nitrate
- 4. Fly ash
- 5. Ammonia
A1, 2 and 3 only
B1, 2 and 4 only ✓ Correct
C3, 4 and 5 only
D1, 2 and 5 only
Correct answer: (B) 1, 2 and 4 only — Coal combustion releases soot, sulphate and fly ash, so the answer is 1, 2 and 4.
Explanation
★Coal combustion releases soot, sulphate and fly ash, so the answer is 1, 2 and 4.
★Burning coal produces fine carbon particles as soot, so statement 1 applies.
★It releases sulphur oxides that form sulphate, so statement 2 applies.
★It leaves fine mineral residue as fly ash, so statement 4 applies.
★Nitrate and ammonia are not the significant products of coal combustion here.
★So statements 3 and 5 are excluded, leaving 1, 2 and 4.
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