Question

Pls tell the answer​

Answer 1

Answer:

Explanation:

1. no

2.  yes

3.no

4.no

5. no

Answer 2

Answer:

see below

Explanation:

1. No,Sawing of wood is irreversible change because the same piece of wood after sawing cannot be obtained again.

2.Yes, melting is physical change,so reversible, it can be freezed again.

3.No, cooking of food involves burning so it is chemical change.This is because while cooking food, the properties of the ingredients and substances gets altered which makes it impossible to recover the original substance back. Therefore, due to this reason it is regarded as a kind of irreversible change.

4.No, it is irreversible .

5. No,. it is irreversible change.Souring of milk is a chemical change because during that process acidification takes place and soured milk is produced. This sour milk has different chemical properties from fresh milk. ... But heating the solution produces a new substance (ferrous sulphide) which has different chemical properties.

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