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Question
We get pungent smell when there is LPG leakage even though natural gas is odourless. Identify the proper reason for this smell.
Options:
A .  LPG gas undergoes oxidation and produces a pungent smell.
B .  A chemical with a pungent odour is added in LPG/CNG to detect leakage.
C .  LPG gas reacts with walls of the cylinder to produce a pungent smell. 
D .  Compressed LPG gas has a pungent smell.
Answer: Option B
:
B
Any accidental leakage can cause an explosion. If the gas leaks in any closed space such as kitchen, etc. then on lighting a matchstick, an explosive mixture will burst into flame causing fire in the house and can cause serious burn injuries.
In order to prevent this, LPG companies add a chemical ethyl mercaptan which helps in detection of the leakage because of the smell imparted.

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