Tag: chemistry

Questions Related to chemistry

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

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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

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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.

Syrup is an example of :
chemistry pure substances and mixtures: separation of mixtures mixtures: examples and properties types of solutions all about mixtures

  1. an element

  2. a mixture

  3. a compound

  4. none of these

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Correct Option: B
Explanation:

Syrup is a mixture of thick sticky liquid consisting of a concentrated solution of sugar and water with or without the addition of a flavoring agent or medicinal substance.

Mixture perfectly uniform in its composition and properties throughout its bulk is called :

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

  1. homogeneous mixture

  2. heterogeneous mixture

  3. both A and B

  4. none of the above

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Correct Option: A
Explanation:

Mixture perfectly uniform in its composition and properties throughout its bulk is called homogeneous mixture, e.g., solution of alcohol in water, dust free air etc.

Sulphuric acid is added to water. What will you get ?

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

  1. Element

  2. Mixture

  3. Compound

  4. None of these

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Correct Option: B
Explanation:

We will get a homogeneous mixture which will be an aqueous solution of sulphuric acid and water making the acid dilute as no reaction takes place between sulphuric acid and water.

Among the following, bronze is a/an example of :

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

  1. an element

  2. a mixture

  3. a compounds

  4. all of these

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Correct Option: B
Explanation:

Bronze is a alloy, it is composed of the mixture of copper and tin. It was made before 3000 bc, though its use in artifacts did not become common until much later. The proportions of copper and tin varied widely (from 67 to 95 percent copper in surviving artifacts).

Sulphur powder and iron filings is an example of :

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

  1. homogenous mixture

  2. heterogeneous mixture

  3. compounds

  4. All of the above

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Correct Option: B
Explanation:

Mixture with different compositions and different properties at different locations in the mixture is called heterogeneous mixture.