Question

1. How would you show that setting of curd is a chemical change
2.Explain why burning of wood and cutting it into small pieces are considered as two different types of changes. ​

Answer 1

Answer:

1)Setting of curd is a chemical change because we cannot get the original substance (milk) back. The new substance, i.e. curd is different from the milk in taste, smell and chemical properties.

2)After burning, we cannot get original substance, (i.e. wood) back. Cutting of wood into small pieces is a physical change because no new substance is formed.

Answer 2

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1. How would you show that setting of curd is a chemical change

2.Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.

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1). Curd,Which is formed from milk, is a completely different substances.It has a different,chemical composition thsn milk.As a new substance is form setting curd from milk is a chemícal change.

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2). Burníng of wood ís a chemícal change as the wood gets converted into a new substance thatis formed.

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