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Why are crisps sealed under a nitrogen atmosphere?

Answer 1

Because such crisps will have a longer shelf life.

The application of a protective blanket of nitrogen gas in the packaging should offer a longer shelf life because nitrogen gas is relatively inert compared to oxygen, which is naturally oxidizing.

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Answer 2

Olivia Anton

Crisps are sealed under a nitrogen atmosphere to prevent them from becoming stale. Oxygen can cause the crisps to go stale by reacting with the fats in the crisps, leading to rancidity and off-flavors. By replacing the air with nitrogen, which is an inert gas, the oxidation process is slowed down, helping to preserve the freshness and crispiness of the crisps for a longer period of time.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.