Why is food kept in airtight containers to reduce rancidity?
Answer and explanation
Correct answer: To reduce contact with air, especially oxygen
Rancidity occurs when oils and fats in food react with oxygen and become oxidised. This can produce an unpleasant smell and taste. An airtight container reduces the food’s contact with air, especially oxygen. Therefore, the rate of oxidation decreases and rancidity is delayed. Unlike option B, increasing the oxygen available to food would promote oxidation of its oils and fats rather than prevent rancidity.
Frequently asked questions
What is the correct answer to this question?
To reduce contact with air, especially oxygen
Why is this the correct answer?
Rancidity occurs when oils and fats in food react with oxygen and become oxidised. This can produce an unpleasant smell and taste. An airtight container reduces the food’s contact with air, especially oxygen. Therefore, the rate of oxidation decreases and rancidity is delayed. Unlike option B, increasing the oxygen available to food would promote oxidation of its oils and fats rather than prevent rancidity.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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