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?
Correct answer: B. 50
- A. 1
- B. 50
- C. 5000
- D. 10000
Explanation
Ethyl mercaptan is added to LPG in a very small concentration, commonly around 50 ppm, because its intense odour makes leaks detectable well before the gas reaches a dangerous concentration. The larger values listed would be excessive.
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