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Question

What is meant by a substance?


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Solution

Substance:

  • A substance is a matter which has a specific composition and specific properties.
  • Every pure element or pure compound is a substance.
  • A substance can not be separated by any physical method.
  • The properties/composition of a pure substance is fixed.
  • Examples of substances are sugar as well as iron.

Properties of substance:

  • A pure substance is composed of only one state of matter.
  • It has a definite mass/weight/volume.
  • It is composed of atoms/molecules.

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