Question

1. Distinguish between physical and chemical changes.
2. Write the worded chemical reaction that occurs during rusting.
3. Describe tinning of iron sheets.
4. Iron rusts, whereas stainless steel which contains large quantity of iron does not. Explain.​

Answer 1

Answer:

physical

Explanation:

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Answer 2

Answer:

Physical changes are changes which can be reversible like bending of iron, evaporation of water

Chemical changes refers to the changes which are irreversible or difficult to re gain like forming of a compound in a reaction

• Reaction of rusting 4fe(s)(ferrous (iron) +3O2(g)(oxygen) gives 2fe2O3(s)(ferrous oxide known as rust

Tinning during forming is often considered a failure criteria in the metal forming industry

4)because stainless steel not only made up of iron it contain some other element that why the stainless steel already react with them and does not react with oxygen and prevent from rust