Question
How can an electromagnet be made?

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1.What is the diagram about?
2.Why is the ice wrapped in wire gauze?
3.What does this experiment prove?
| Column ‘A’ | Column B’ |
| 1. Cardiac muscle | a. Always functions in pairs |
| 2. Are brought about by muscle | b. We never feel tired |
| 3. Pepsin | c. Uncontrolled and painful contraction of muscles |
| 4. Cramps | d. Chewing movement of the jaw |
| 5. Skeletal muscles | e. Enzymes of the gastric juice |

2.Which of the changes are permanent?
3.In which did the original matter undergo a change?
4.In which the original matter remain unchanged?
5.In which of the changes was a new substance with a new property formed?

1.What is the process shown in the given picture?
2.Explain the process.
3.What are the gaseous substances formed in the above process?
4.When the products of the process is refined, what other components are produced?