Consider the following substances:I.EthanolII.NitroglycerineIII.Urea Coal gasification technology can be used in the production of how many of them?

1. A

   Only one

   Only one. Syngas routes feed more than one of the listed chemicals.

2. B

   Only two

   Only two. Coal gasification gives syngas (CO + H2), which is a feedstock for ethanol/methanol-family fuels and for ammonia-urea. Nitroglycerine is not made that way.

3. C

   All the three

   All three. Nitroglycerine is glycerol plus nitric acid, not a gasification product.

4. D

   None

   None. Two of the three can sit on a syngas chain.

Summary. Official Set A key is (b) only two. Coal gasification makes syngas. From syngas you can reach methanol/ethanol-type fuels and ammonia, hence urea. Nitroglycerine is made by nitrating glycerol for explosives and medicine; it does not come from coal gas. So I and III can be tied to gasification; II cannot. That is two, not one, not three, not none.