UPSC Prelims 2005 Q91: Indian Economy – Infrastructure & Industry
- (a) 1 only
- (b) 1 and 3
- (c) 2 and 3
- (d) 1, 2 and 3
Answer: (a) 1 only
Explanation
> Note for students: Some answer keys give '1 and 3', but statement 3 is factually wrong because natural gas liquids are separated from natural gas and not from LPG. The correct answer by facts is (a) 1 only. If you are not sure the examiner followed the facts, you may prefer to skip it.
Liquefied natural gas and natural gas liquids
| Statement | Verdict |
|---|---|
| 1. LNG is liquefied at extremely cold temperature and transported in special vessels | True — natural gas is cooled to about minus 162 degrees Celsius and shipped in insulated tankers |
| 2. First LNG terminal in India was built in Hassan | False: the first terminals were at Dahej (2004) and Hazira (2005) |
| 3. NGLs are separated from LPG | False: NGLs are separated from natural gas, and LPG itself is made of propane and butane from NGLs and refining |
Only statement 1 is factually correct. Statement 2 names the wrong place, and statement 3 reverses the process, because natural gas liquids such as ethane, propane, butane and natural gasoline are separated from natural gas, not from LPG. (The commonly circulated key says 1 and 3; the real answer is 1 only, as statement 3 is wrong.)
Answer: (a) 1 only.
Why each option is right or wrong
- (a) CORRECT. Only statement 1 is factually correct.
- (b) Incorrect. Statement 3 wrongly says NGLs are separated from LPG.
- (c) Incorrect. Statements 2 and 3 are both wrong.
- (d) Incorrect. Statements 2 and 3 are both wrong.
Key point
NGLs come out of natural gas; LPG is propane and butane; LNG is natural gas cooled to a liquid.
Remember
NGLs are separated from natural gas, not from LPG.
Common mistakes
- Accepting that NGLs are separated from LPG, when the source is natural gas.
- Choosing Hassan, a Karnataka town with no LNG terminal.
- Trusting a circulated key without testing each statement.
Exam tip
First LNG terminals: Dahej (Gujarat) and Hazira (Gujarat).
Sources
- Ministry of Petroleum and Natural Gas — annual report 2004-05
- Encyclopaedia Britannica — liquefied natural gas