Tag: mixtures: examples and properties

Questions Related to mixtures: examples and properties

A salt is made by adding an excess of an insoluble metal oxide to an acid. How is the excess metal oxide removed from the mixture?

chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

  1. chromatography

  2. crystallisation

  3. distillation

  4. filtration

Show answer
Correct Option: D
Explanation:
$\text{Filtration is defined as the process of separating suspended solid matter from a liquid.}$$\text{ So it can be used to remove metal oxide from the mixture.}$

State True or False.
A mixture can not be represented by a chemical formula.

chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

  1. True

  2. False

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Correct Option: A
Explanation:

In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances on which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.

Example of  a 'solid in liquid' mixture is :

chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

  1. oil in water

  2. muddy water

  3. smoke

  4. all of these

Show answer
Correct Option: B
Explanation:

 Phases of matter   Name of mixture  Examples
 Liquid - liquid  Emulsion  Oil in water
 Solid - liquid  Suspension  Muddy water
 Gas - liquid  Aerosol  Fizzy drinks
 gas - solid  Smoke  Smog

A mixture is a combination of two or more substances, where these substances are not bonded (or joined) to each other and no chemical reaction occurs between the substances.

Pick out the mixture from the following.

chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

  1. Water

  2. Oxygen

  3. Carbon dioxide

  4. Air

Show answer
Correct Option: D
Explanation:

Air is a mixture of gases in the atmosphere. Water is a compound, oxygen $(O _2)$is a molecule and carbon dioxide is also a compound.


Option $(D)$ is correct .

We separate mixtures to :

chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

  1. remove unwanted components

  2. to get pure substances

  3. Both of the above

  4. None of the above

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Correct Option: C
Explanation:

We separate mixture to remove the unwanted components and to get pure substances.

The components retain their individual properties in:

chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

  1. Solutions

  2. Mixtures

  3. Compounds

  4. Solvents

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Correct Option: B
Explanation:

1) Solution is a homogeneous mixture of two or more substances.
2)Compound a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
3) solvent is a substance that dissolves a solute (a chemically different liquid, solid or gas), resulting in a solution.

Hence only mixtures are the one in which the individual properties of the components are retained

Pick out the liquid-in-gas type of mixture from the following.

chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

  1. Dissolved carbon dioxide in water

  2. Droplets of water in air

  3. Oxygen dissolved in water

  4. All of the above

Show answer
Correct Option: B
Explanation:

Droplet of water in air is an example of water in air, in this dispersed phase is water and dispersion medium is of air.

Which of the following is not a mixture?

chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

  1. Air

  2. Sea water

  3. Ice

  4. Soil

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Correct Option: C

Steel is made up of :

chemistry pure substances and mixtures: separation of mixtures mixtures: examples and properties types of solutions all about mixtures

  1. copper and tin

  2. iron, carbon and chromium

  3. iron, carbon and tin

  4. iron, carbon and silicon

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Correct Option: B
Explanation:

Iron mixed with carbon to produce steel is the main component of stainless steel. Chromium is added to make it resistant to rust.

Steel is a type of :

chemistry pure substances and mixtures: separation of mixtures mixtures: examples and properties types of solutions all about mixtures

  1. Solid-liquid heterogeneous mixture

  2. Solid-solid heterogeneous mixture

  3. Solid-solid homogeneous mixture

  4. Pure substance

Show answer
Correct Option: C
Explanation:

Centrifugation is a technique which involves the application of centrifugal force to separated particles from a solution.Generally this is used in wasting machines to separated water particles from cloths during dry washing.