Sodium hydroxide
Hydrochloric acid
Ethylene
Ammonia
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The correct answer is:
None of the above are fine chemicals — but let me explain:
Fine chemicals are:
• Pure, complex, and highly specialized chemicals
• Usually produced in small quantities
• Often used in pharmaceuticals, agrochemicals, and perfumes
Now let’s look at the options:
Substance Type
A. Sodium hydroxide Bulk (inorganic) chemical
B. Hydrochloric acid Bulk (inorganic) chemical
C. Ethylene Bulk petrochemical
D. Ammonia Bulk (inorganic) chemical
So, the answer is:
None of the options is a fine chemical, but among them, the closest to being used as a base for fine chemicals is Ethylene (C) — because it’s a feedstock for making fine chemicals, even though ethylene itself is not a fine chemical.
Best choice: C. Ethylene (if you have to pick one).


