Q2 of 37 Page 26

Give the best way to preserve items like meat for longer periods.

Common salt is used to preserve meat for longer periods as it removes water from body of microbes thus killing them and protect the meat from getting spoiled for longer periods.


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3

Viruses can infect humans as well as plants and animals. Give example.

 1

The milk that comes in packets does not get spoiled. Give reason.

 3

A chemical is added to pickles to check their spoilage. Name it.

 4

Name an element present in atmosphere that is essential for living organisms.