Answers

2014-10-24T20:03:23+05:30
Food material spoil because of the actions of microorganisms, due to moisture, due to improper storage, Enzymes, Bacteria etc  
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2014-10-24T20:27:08+05:30
It is due to rancidity. the food materials spoil when kept outside for more time this occurs.
rancidity means actipon of food materials with oxygen and forming its respective oxide and gives bad smell and taste. in this oxidation process is involved.0

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explain a bit, what rancidity is.
ok
The answer is enzymatic activities and osmotic inhibition spoils the food and rancid i