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. (a) (i), (ii) and (iii)
    (b) (i), (ii) and (iv)
    (c) (i), (iii) and (iv)
    (d) (ii), (iii) and (iv)

AcademicChemistryNCERTClass 9

Correct Answer: (c) (i), (iii) and (iv)  

Explanation: Rusting of Iron is a chemical change because rusting causes the formation of a new compound. All other are examples of physical changes where no new compounds are formed. 

Updated on 10-Oct-2022 13:29:32