Match List-I with List-II and select the correct answer using the code given below :
| List-I (Process) | List-II (Contaminant) |
|---|---|
| A. Aeration followed by filtration | 1. Removal of colour |
| B. Reverse Osmosis | 2. Removal of microorganism |
| C. Filtration through activated carbon | 3. Removal of iron |
| D. Treatment with UV light | 4. Removal of excess salts |
Code:
3 1 4 2
4 3 2 1
3 4 1 2
2 4 1 3
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CAPF – 2009
– B. Reverse Osmosis: This process uses a semipermeable membrane to remove dissolved salts and other impurities from water, effectively used for desalination or removal of excess salts (4).
– C. Filtration through activated carbon: Activated carbon is highly effective at adsorbing organic compounds, chlorine, and other substances that cause color, odor, and taste in water. Thus, it’s used for the removal of colour (1).
– D. Treatment with UV light: Ultraviolet (UV) light treatment is a disinfection method that inactivates microorganisms like bacteria and viruses by damaging their DNA. Thus, it’s used for the removal of microorganisms (2).
A. Aeration followed by filtration – 3. Removal of iron
B. Reverse Osmosis – 4. Removal of excess salts
C. Filtration through activated carbon – 1. Removal of colour
D. Treatment with UV light – 2. Removal of microorganism
This corresponds to the code 3 4 1 2, which is option C.