Question

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Answer 1

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(1) There are several ways in which salt and sugar inhibit microbial growth. The most notable is simple osmosis, or dehydration.

● The result is a reduction of the so-called product water activity (aw), a measure of unbound, free water molecules in the food that is necessary for microbial survival and growth.

(2) Potato chip bags are not full of air, but of nitrogen gas. This is done to prevent the chips from oxidizing, which is part of what makes them go stale. Oxygen is very reactive, and likes to combine with other molecules whenever it can, causing chemical changes to take place.

Answer 2

Answer:

1) Because both work like antioxidants.

2) Nitrogen gas is an unreactive gas which don't allow oxygen to make chips rancid.

3) When we rub our hands both produces a charge and make our hands warm.

4) Spike shoes provide support and make grip which don't makes sports man to fall easily.

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