Answer:
(a)
Chips remain fresh for a longer time in sealed packet because the sealed packet
contains an inert gas (generally nitrogen), which prevents the oxidation of
fats and oils of the chips. (1)
(b) Chips of an open packet become rancid because of the oxidation of fat
and oil of the chips (food) by oxygen of air. (1)
(c) The value I have learnt from this passage is never eat
a food kept open for a longer time.
(1)
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