# NCERT Class – 9 Science Solution: Chapter 2 is Matter Around Us Pure-Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question: 6

Which of the following are physical changes?

1. Melting of iron metal
2. Rusting of iron
3. Bending of an iron rod
4. Drawing a wire of iron metal
5. (i) , (ii) and (iii)
6. (i) , (ii) and (iv)
7. (i) , (iii) and (iv)
8. (ii) , (iii) and (iv)

Question: 7

Which of the following are chemical changes?

1. Decaying of wood
2. Burning of wood
3. Sawing of wood
4. Hammering of a nail into a piece of wood
5. (i) and (ii)
6. (ii) and (iii)
7. (iii) and (iv)
8. (i) and (iv)

Question: 8

Two substances, A and B were made to react to form a third substance,

according to the following reaction

Which of the following statements concerning this reaction are incorrect?

1. The product shows the properties of substances A and B
2. The product will always have a fixed composition
3. The product so formed cannot be classified as a compound
4. The product so formed is an element
5. (i) , (ii) and (iii) ,
6. (ii) , (iii) and (iv)
7. (i) , (iii) and (iv)
8. (ii) , (iii) and (iv)