Tag: separation of substances

Questions Related to separation of substances

Smoke is an example of:

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

  1. liquid-in-gas mixture

  2. gas-in-solid mixture

  3. solid-in-gas mixture

  4. gas-in-liquid mixture

Show answer
Correct Option: C
Explanation:

Liquid in gas $ex>$ Fog,Mist,cloud.

Gas in solid $ex>$Foam rubber.
Solid in gas $ex>$Smoke,dust.
Gas in liquid $ex>$Froth,soap lather.




Column II gives method to separate phases mentioned in column I. Match them and select the correct answer from the codes given below.

Column I Column II
(a) Miscible liquids (p) Distillation
(b) Immiscible liquids (q) Crystallization
(c) Pure copper sulphate  from an impure sample (r) Sublimation
(d) Salt and ammonium chloride (s) Separating funnel
chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

  1. (a) - (q), (b) - (s), (c) - (p), (d) - (r)

  2. (a) - (p), (b) - (s), (c) - (q), (d) - (r)

  3. (a) - (r), (b) - (s), (c) - (p), (d) - (q)

  4. (a) - (r), (b) - (s), (c) - (q), (d) - (p)

Show answer
Correct Option: B
Explanation:

Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.
Salt and ammonium chloride can be separated using this.
Crystallization is also a chemical solid-liquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs.
Pure copper sulphate from an impure sample.
Distillation is a process of separating the component substances from a liquid mixture by selective evaporation and condensation. Distillation may result in essentially complete separation (nearly pure components), or it may be a partial separation that increases the concentration of selected components of the mixture.
A separating funnel is a glass funnel with a tap at the bottom. A separating funnel is a separation technique that is used for two liquids that do not dissolve in each other.

A gray solid when heated vaporised to form pure white crystals on the cooler parts of the test tube and heavily, black solid as the residue. It is likely that the original solid is :

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

  1. an element

  2. a metal

  3. a pure compound

  4. a mixture

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Correct Option: D
Explanation:

Heating is a physical means to separate a mixture of two substances which are not chemically together as in a compound so they are separated by heating.

We separate mixtures to:

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

  1. remove unwanted components

  2. to get pure substances

  3. both the $A$ and $B$

  4. none of the above

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Correct Option: C

In a mixture, constituents exhibit:

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

  1. similar properties

  2. only those properties which are characteristic to the mixture

  3. their own properties

  4. no properties

Show answer
Correct Option: C
Explanation:

In a mixture constituents exhibit their own individual property.

A _____ is a mixture of two or more substances in a single phase.

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

  1. Element

  2. Compound

  3. Solution

  4. None of above

Show answer
Correct Option: C
Explanation:

A solution is a mixture of two or more substances in a single phase. At least two substances must be mixed in order to have a solution. Since solutions are mixtures, their compositions may vary over a very wide range. The concentrations may be expressed using a variety of measures.

Which of the following statement is incorrect about mixtures?

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

  1. A mixture contains two or more substances

  2. Particles in mixtures are of more than one kind

  3. Compounds or elements in a mixture is mixed in any proportion by mass

  4. None of the above

Show answer
Correct Option: D
Explanation:

A mixture is a combination of two or more materials, compounds or elements where there is no chemical combination or reaction.

Here materials can be anything for example: compounds, elements etc.

Statement (1): Mixture is a chemical combination of two or more elements.
Statement (2): Properties of the constituents of a mixture remain same.

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

  1. Statement I is true and Statement II is false

  2. Both statement I and II are true and II is not a correct explanation of statement I

  3. Both statement I and II are false

  4. Statement I is false and Statement II is true

  5. Both statement I and II are true and II is a correct explanation of statement I

Show answer
Correct Option: D
Explanation:

The mixture is a combination of two or more elements in such a way that no chemical reaction occurs. So, a mixture is a physical combination of two or more elements.

Properties of the constituents of a mixture remain same. The mixture can be separated back into its original constituents.
So statement 1 is incorrect and statement 2 is correct.
So D) is the correct answer.

Choose the correct statement from the following.

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

  1. Liquor ammonia and soda water are examples of liquid-gas type mixtures.

  2. Mixture of coconut oil and water can be separated using separating funnel.

  3. A mixture of iodine and sulphur can be separated using magnetic separation.

  4. A mixture of sand and sawdust can be separated using solvent extraction.

Show answer
Correct Option: A,B
Explanation:

Liquor ammonia is a concentrated solution of ammonia in water due to which, it forms a liquid-gas mixture with soda water(carbon dioxide gas under pressure)


Since coconut oil and water have different densities, they can be separated from each other by using a separating funnel

Since none among iodine and sulphur have magnetic properties, they cannot be separated using magnetic separation

Both sand and sawdust are highly insoluble in all the solvents and they cannot be separated using solvent extraction method

What type of mixture is steel?

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

  1. Solid-liquid heterogeneous mixture

  2. Solid-solid heterogeneous mixture

  3. Solid-solid homogeneous mixture

  4. Pure substance

Show answer
Correct Option: C
Explanation:

Steel is alloy of iron and carbon, so it is forming a solid - solid homogeneous mixture.