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Difficulty: MediumHeavy Chemicals and Fine Chemicals

Industrial chemical manufacturing processes are classified into heavy chemical production and fine chemical production depending on operational scale, purity requirements, and economic cost. Which of the following options correctly pairs a fine chemical with its defining production characteristic?

  1. A
    Tetraoxosulfate(VI) acid — synthesized in small batch quantities at a high unit cost
  2. Aspirin — produced in batch operations to achieve a high degree of purityAnswer
  3. C
    Sodium hydroxide — prepared in limited volume primarily as a specialized pharmaceutical reagent
  4. D
    Ammonia — produced in small batches to maximize purity for direct commercial sale

Answer

Aspirin is a fine chemical produced in batch operations to achieve a high degree of purity.
Fine chemicals such as pharmaceuticals (e.g., aspirin), dyes, and analytical reagents are characterized by production in small batch lots under strict quality control to guarantee high purity levels.

Step-by-Step Solution

1
Differentiate heavy chemicals from fine chemicals based on production criteria.
Heavy chemicals (H2SO4\text{H}_2\text{SO}_4, NaOH\text{NaOH}, NH3\text{NH}_3) are manufactured continuously in large tonnage (bulk) at low cost with moderate purity. Fine chemicals (pharmaceuticals, dyes, perfumes, food additives) are produced in small batch quantities with high chemical purity and high unit price.
Classification relies on understanding scale, batch versus continuous operation, and required purity level.
2
Evaluate the given choices against these criteria.
Aspirin is a pharmaceutical substance manufactured in small batches requiring precise quality control and exceptional purity, matching all criteria of a fine chemical.
Identifying the correct pair requires matching the named compound with its true industrial chemical category.

Key Concept

Distinction between Heavy Chemicals and Fine Chemicals
Estimated Time:1m 0s
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Topics

Heavy Chemicals and Fine Chemicals

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