Plant Products · Botany

Which of the following is a non-drying oil commonly used in the manufacture of soaps and lubricants?

  1. Flax oil
  2. Castor oil
  3. Soybean oil
  4. Sunflower oil
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Correct answer: Castor oil

Castor oil (from Ricinus communis) is a non-drying oil because it does not form a thin film when exposed to air. It is rich in ricinoleic acid, making it highly valuable for industrial lubricants.

Difficulty: Medium Question 10 of 20

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