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Q. Consider the following substances:

I. Ethanol 

II. Nitroglycerine 

III. Urea 

Coal gasification technology can be used in the production of how many of them? 

(a) Only one 

(b) Only two 

(c) All the three 

(d) None

Ans-b

Explanation

Coal is one of the most abundant natural resources in the country. Coal gasification technology enables conversion of coal into syngas (synthetic gas)

Syngas can be used to produce Gaseous Fuels such as Hydrogen, Substitute Natural Gas (SNG or Methane), Di-Methyl Ether (DME), Liquid Fuels such as Methanol, Ethanol, Synthetic diesel and Chemical and Petrochemicals like Methanol derivatives, Olefins, Propylene, Mono-Ethylene Glycol (MEG). Acetic Acid, Formaldehyde, nitrogenous fertilizers including Ammonia , Urea, Ammonium nitrate, DAP  

Hence 1 and 3 are correct 

Nitroglycerine is an explosive liquid which was first made by Ascanio Sobrero in 1846 by treating glycerol with a mixture of nitric and sulphuric acid. It is not produced by Coal Gasification . 

Hence2 is in correct

Read: Solved PYQs Science & Technology With Explanation 2025 UPSC Prelims

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