Tag: separation of substances

Questions Related to separation of 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

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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

Identify the mixture from the following:

chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

  1. Oxygen

  2. Carbon dioxide

  3. Hydrogen

  4. Air

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Correct Option: D
Explanation:

The mixture consists of constituents in indefinite proportion. It may change over time. Air has 78% Nitrogen, 21% Oxygen and 1% other constituents such as $CO _2$, water vapour etc. About 100 years ago the proportion of $CO _2$ in the air was about 0.029% and now it is 0.035%. Thus we see that it's proportion has changed.

Which of the following is a mixture?

chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

  1. Water

  2. Oxygen

  3. Carbon dioxide

  4. Air

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Correct Option: D
Explanation:

A mixture consists of constituents in indefinite proportion. It may change over time. Air has 78% Nitrogen, 21% Oxygen and 1% other constituents such as CO2, water vapour etc. About 100 years ago proportion of CO2 in air was about 0.029% and now it is 0.035%. Thus we see that it's proportion has changed. Therefore, air is a mixture.

A substance that cannot be separated into other kinds of matter by any physical process is known as :

chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

  1. element

  2. compound

  3. solution

  4. mixture

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Correct Option: A
Explanation:

Elements are the fundamental particles of all kinds of matter. They can't be separated by any physical or chemical means.

Which of the following is not a property of a mixture?

chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

  1. Mixtures have definite set of properties

  2. Components in mixture retain their original properties

  3. The parts of mixture can be separated by physical means

  4. Mixtures do not have a sharp melting or boiling point

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Correct Option: A
Explanation:

The important point regarding mixture is that it always retain the original property of its components, so mixture dont have any definite set of properties.

Which of the following is an example of mixture in which various constituents are mixed uniformly?

chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

  1. Solution of salt in water

  2. Air

  3. Alloy

  4. All of the above

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Correct Option: D
Explanation:

Solution of salt in water, air, alloy are all examples of homogeneous mixture. They are formed by mixing different elements in to form a mixture which is in single state. Hence they are also called as homogeneous mixture.

What is a mixture?

chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

  1. Substance with two or more different particles

  2. Substance that is insoluble

  3. Substance with a single homogenous particle

  4. None of above

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Correct Option: A
Explanation:

A substance which contains two or more different particles is known as mixtures. Example: the Salt solution is made up of two components, salt and water. Therefore, the salt solution is a mixture.


Hence, the correct option is $A$

Which of the following is a type of mixture in which constituent elements are not uniformly distributed?

chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

  1. Blood

  2. Salt and water

  3. Bronze

  4. None of the above

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Correct Option: A
Explanation:

Blood is an example of heterogeneous mixture.