Why does keeping food in an airtight container reduce rancidity?
Answer and explanation
Correct answer: Contact with oxygen decreases
Rancidity mainly results from oxidation of unsaturated oils and fats by oxygen in the air. An airtight container limits the entry and contact of oxygen, so the oxidation rate decreases and unpleasant smells and tastes develop more slowly. Thus option B is correct. Heating would generally speed many oxidation processes, while precipitation and conversion into metal have no connection with rancidity.
Frequently asked questions
What is the correct answer to this question?
Contact with oxygen decreases
Why is this the correct answer?
Rancidity mainly results from oxidation of unsaturated oils and fats by oxygen in the air. An airtight container limits the entry and contact of oxygen, so the oxidation rate decreases and unpleasant smells and tastes develop more slowly. Thus option B is correct. Heating would generally speed many oxidation processes, while precipitation and conversion into metal have no connection with 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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