Allied solutions

Allied solutions

Grade 7

Air and Atmosphere | Exercise

Question 13

Q13) State four properties of a compound and a mixture. With reference to the stated properties give reasons why air is considered a mixture and not a compound.

Solution:

Properties of Compounds:

  1. They have a fixed composition.
  2. They have definite properties.
  3. They cannot be separated physically.

Properties of mixtures

  1. They have a variable composition.

  2. They have no definite properties

  3. They can be separated by physical methods.

Air is a mixture because it has variable composition and no definite properties.

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subject-cta

Question 13

Q13) State four properties of a compound and a mixture. With reference to the stated properties give reasons why air is considered a mixture and not a compound.

Solution:

Properties of Compounds:

  1. They have a fixed composition.
  2. They have definite properties.
  3. They cannot be separated physically.

Properties of mixtures

  1. They have a variable composition.

  2. They have no definite properties

  3. They can be separated by physical methods.

Air is a mixture because it has variable composition and no definite properties.

Still have questions? Our expert teachers can help you out

Book a free class now

Want to top your chemistry exam ?

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subject-cta
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