Which of the following gas is used in food preservation?

Nitrogen

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Oxygen

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Helium

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Argon

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Solution

The correct option is A Nitrogen

When food items are not properly packed, microrganisms grow and can deteriorate the quality of food.

Presence of oxygen favours the microbial growth in food items resulting in their spoilage.

Inorder to replace oxygen, non-reactive gases like nitrogen and argon are filled in food packets to preserve them for a longer period.

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