AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Chips manufacturers flush packets with nitrogen gas to prevent oxidation (rancidity) of the chips. Oxygen in air causes the chips to turn stale and spoil quickly. Nitrogen is used because it is a chemically inert (non-reactive) gas — it does not react with the food, keeping the chips fresh while also preventing the packet from being crushed.
This question draws on the concept of chemical reactivity of gases (from Chapter 4, Carbon and its Compounds context — inert gases). Key points examiners look for: (1) naming the problem — oxidation/rancidity, (2) explaining why nitrogen helps — it is inert/non-reactive. Avoid writing lengthy explanations; two clear points are enough for 2 marks.