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
the detection of its leakage (by bad odour) to the extent of about __________
ppm.
(A) 1
(B) 50
(C) 5000
(D) 10000