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Home » Class 9 » Is matter around us pure » Mixtures

Mixtures

Last Updated on February 23, 2025 By Mrs Shilpi Nagpal

Contents

  • 1 Questions
  • 2 Mixtures
  • 3 Homogeneous Mixture
  • 4 Heterogeneous Mixture
  • 5 Properties of Mixtures
  • 6 Difference Between Compounds and Mixtures

Questions

Question 1: What are mixtures? Give examples.
Question 2: What are homogeneous mixtures? Give examples.
Question 3: What are heterogeneous mixtures? Give examples.
Question 4: Give a few properties of homogeneous mixtures.
Question 5: Give a few properties of heterogeneous mixtures.
Question 6: Differentiate between mixtures and compounds.
Question 7: Why is air considered a mixture, not a compound?

Mixtures

A mixture is a substance that consists of two or more elements or compounds not chemically combined together.

Examples:

  • Air is a mixture of gases like oxygen, nitrogen, argon, carbon dioxide, etc.
  • Gun Powder is a mixture of potassium nitrate, sulfur, and charcoal.
  • Brass is a mixture of copper and zinc.

The various substances present in a mixture are called its constituents or components.

Types of mixtures:

  1. Homogeneous Mixture
  2. Heterogeneous Mixture

Homogeneous Mixture

  1. Those mixtures in which the substances are completely mixed together and are indistinguishable from one another.
  2. They have a uniform composition throughout their mass.
  3. They have no visible boundaries of separation between various constituents.
  4. Examples: Sugar solution, salt solution, alcohol and water, soft drinks, etc.

Heterogeneous Mixture

  1. Those mixtures in which the substances remain separate and one substance is spread throughout the other.
  2. They do not have a uniform composition.
  3. They have visible boundaries.
  4. Examples: Sugar and sand, salt and sand, milk, soil, blood, starch, muddy water, etc.

Properties of Mixtures

  1. They can be separated into their constituents by physical processes (filtration, evaporation, sublimation, distillation).
  2. A mixture shows the properties of all its constituents present in it.
  3. Formation of a mixture is a physical change, i.e., energy (in the form of heat, light, etc.) is usually neither given out nor absorbed in the preparation of a mixture.
  4. The constituents are present in any proportion by mass.
  5. They do not have definite melting and boiling points.
  6. They can be homogeneous or heterogeneous.

Difference Between Compounds and Mixtures

Mixtures Compounds
1. A mixture can be separated into its constituents by physical processes. 1. A compound cannot be separated into its constituents by physical processes.
2. A mixture shows the properties of its constituents. 2. A compound does not show the properties of its constituents.
3. Energy is usually neither given out nor absorbed in the preparation of a mixture. 3. Energy is usually given out or absorbed during the preparation of a compound.
4. The composition of a mixture is variable; the constituents can be present in any proportion by mass. 4. The composition of a compound is fixed; the constituents are present in fixed proportions by mass.
5. A mixture does not have a fixed melting and boiling point. 5. A compound has a fixed melting and boiling point.

Filed Under: Class 9, Is matter around us pure Tagged With: air, brass, components, compounds, constituents, gun powder, heterogeneous mixture, homogeneous mixture, mixtures, properties of mixture, types of mixture

About Mrs Shilpi Nagpal

Author of this website, Mrs. Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed. (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading free education to everyone.

Reader Interactions

Comments

  1. Ayushi pawar says

    April 28, 2020 at 10:54 am

    Very well written, whatever is written in it and I can understand it completely and write very simple language.

  2. Suvarna holani says

    July 25, 2020 at 10:54 pm

    Very precise and upto the point description
    Thanks

  3. Geetha says

    August 31, 2020 at 3:30 pm

    It’s very easy to learn and we can understand neatly.

  4. Palak says

    July 3, 2021 at 1:15 pm

    Thank u now my doubt is cleared

  5. Aaliya says

    July 8, 2021 at 4:37 pm

    Thanku mam. It becomes too easy for us to understand the chapter Or the topic because of u mam…..
    Thanku soo much

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