Paper 1 · People, Development and Environment
UGC NET June 2024 Re-Exam (28.08.2024) Shift-I
Match List I (Water treatment) with List II (Process) and choose the correct answer from the options given below.
List I
- Primary
- Secondary
- Tertiary
- Advanced
List II
- Removal of wastes with the help of activated charcoal etc.
- Ozonization and disinfection by ultraviolet rays
- Removal of large pieces such as sticks, stones, rags, plastic etc.
- Removal after flocculation and coagulation of wastes
AI-a, II-b, III-c, IV-d
BI-c, II-d, III-a, IV-b ✓ Correct
CI-b, II-c, III-a, IV-d
DI-d, II-a, III-b, IV-c
Correct answer: (B) I-c, II-d, III-a, IV-b — The correct match is primary with removing large pieces, secondary with flocculation and coagulation, tertiary with activated charcoal and advanced with ozonization, that is I-c, II-d, III-a, IV-b.
Explanation
★The correct match is primary with removing large pieces, secondary with flocculation and coagulation, tertiary with activated charcoal and advanced with ozonization, that is I-c, II-d, III-a, IV-b.
★Primary treatment removes large pieces like sticks, stones and plastic.
★Secondary treatment removes wastes after flocculation and coagulation.
★Tertiary treatment removes wastes with the help of activated charcoal.
★Advanced treatment uses ozonization and ultraviolet disinfection.
★So the correct pairing is I-c, II-d, III-a, IV-b.
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