Multiple choice

The rancidity of oil is caused by:

  1. anti-oxidants

  2. exposure to light only

  3. exposure to the oxygen & moisture of air

  4. anti-microbial agents
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fats can be kept fresh and unrancid longest by keeping at very cool temperatures and in the dark, and away from exposure to oxygen & moisture of the atmosphere. Ideally this would mean in refrigeration without light or in a light-blocking container, and either vacuum-sealed or else with airspace filled with nitrogen or other nontoxic gas without oxygen.

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