Question

3 Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.
4 How would you show that setting of curd is a chemical change?
please ans this fast

Answer 1

Answer:

3.burning of wood is a chemical change as itis irreversible and it gives out gases

cutting it into all pieces is a chemical change as re there is only a change in physical properties

4.after setting of curd th acids are chemically changed, change is there in its physical properties, therefore it is a chemical change

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Answer 2

4

setting curd is a chemical change because we cannot get the original substances milk back the new substance is curd is different from the milk in taste.

3

burning of wood is a chemical change by cutting of wood is a physical change because during burning new substances are formed after burning we cannot get original substances back cutting pieces is a physical change because no new substances is formed...

I hope it will help you