| Q.85 | The dissolved oxygen level in natural unpolluted water at normal temperature is found to be of the order of: | |
| Ans | 1. 1000 mg/l | |
| 2. 1 mg/l | ||
| 3. 10 mg/l | ||
| 4. 100 mg/l |
Correct Ans Provided: 3
Date: 17/07/2022 Shift: 2:30 PM – 5:30 PM Q. No: 85
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