MCQOPTIONS
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| 1. |
Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about __________ ppm. |
| A. | 1 |
| B. | 50 |
| C. | 5000 |
| D. | 10000 |
| Answer» C. 5000 | |