Paper 1 · People, Development and Environment
UGC NET June 2024 Re-Exam (30.08.2024) Shift-I
What would be the correct sequence of the treatment process from start to finish for drinking water? Choose the correct answer from the options given below.
- 1. Filtration
- 2. Disinfection
- 3. Gravitational settlement of large particles
- 4. Flocculation
A1, 2, 3, 4
B1, 2, 4, 3
C3, 4, 1, 2 ✓ Correct
D3, 4, 2, 1
Correct answer: (C) 3, 4, 1, 2 — The correct sequence is 3, 4, 1, 2, so that is the answer.
Explanation
★The correct sequence is 3, 4, 1, 2, so that is the answer.
★First large particles settle out by gravity.
★Then flocculation clumps the colloidal particles.
★Filtration then removes the solid particles.
★Finally disinfection kills the remaining germs.
★Hence 3, 4, 1, 2 is correct.
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