Question

1.Fill in the following blanks with suitable words.

(1). Changes in which new substance is formed are called______________changes

(2). Melting of wax is a_____________change but burning of wax is a______________change

(3). Souring of milk is a_____________change

(4).The two methods by which rusting of iron can be prevented are_______________and______________.

(5). The presence of_________________in sea water makes the process of rust formation on ships faster.​

Answer 1

1.chemical change

2.physical,chemical

3.chemical

4.Galvanisation,greasing

5.salt

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Answer 2

Answer:

1. chemical

2. physical, chemical

3. chemical

4. Galvanization, painting

5. Salt

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