Question

Very short answer type questions,
(a) Give an example of a physical change.
(b) What type of change is digestion of food?
(c) What is formed when vinegar is added to baking soda?
(d) What two conditions are essential for the rusting of iron?
(e) What is the composition of stainless steel?​

Answer 1

ANSWER:

a》change of strenght

b》physical and chemical change

c》carbon dioxide water and something called sodium acetate

d》the 2 conditions are (I) water (II) oxygen

e》Steel is an alloy of iron and carbon. Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon and other alloying elements. Stainless steel’s corrosion resistance and mechanical properties can be further enhanced by adding other elements, such as nickel, molybdenum, titanium, niobium, manganese, etc.

EXPLANATION :

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