MCQOPTIONS
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MCQOPTIONS
| 1. |
The decomposition of sewage takes place, causing a pungent smell. Which of the following causes the pungent smell?$ |
| A. | CO<sub>2</sub> |
| B. | H<sub>2</sub>SO<sub>4</sub> |
| C. | HCL |
| D. | H<sub>2</sub>S |
| Answer» E. | |