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Chapter 6 Physical and Chemical Changes

  • The physical appearance are called the physical properties.
  • Changes are the part of our daily life.
  • Changes are of two types- physical and chemical.
  • The changes which we can see physically called physical change. For example melting of ice.
  • The changes which we cannot see are called as chemical change. For example souring of milk, milk to curd.
  • Simply we can say the changes in which new substances is formed called chemical change and in which new substance are not formed called as physical change.
  • Rusting of iron is the example of chemical change.
  • Galvanization is the process by which a layer of zinc on the surface of iron to protect it from rusting.

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Exercise 1 ( Page No. : 66 )

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