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What effect do airtight packaging and filling a packet with nitrogen gas have on rancidity?

Answer and explanation

Correct answer: They reduce the food’s contact with oxygen.

Rancidity occurs when oils and fats are oxidised by oxygen, causing unpleasant smell and taste in food. Airtight packaging and nitrogen filling reduce exposure to oxygen, so oxidation and rancidity are slowed. Option B is the opposite: greater exposure to oxygen would promote rancidity.

Related tags

ScienceClass 10Chemical ReactionsRancidityOxidationNitrogen Packaging

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