Tag: classification of mixtures

Questions Related to classification of mixtures

Mixture is a physical combination of two or more pure substances.

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

  1. True

  2. False

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Correct Option: A
Explanation:

Mixture, a physical combination of two or more pure substances. A mixture is distinguished from a compound, which is formed by the chemical combination of two or more pure substances in a fixed, definite proportion. 

It should be noted that the components of a mixture retain their own chemical properties and may be present in any proportion.

Gunpowder is an example of a__________.

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

  1. compound

  2. mixture

  3. element

  4. none of these

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Correct Option: B
Explanation:
Gunpowder is an explosive mixture of potassium nitrate, charcoal, and sulphur in ratio 75 : 15: 10 used in time fuses, blasting and fireworks. 
It is obtained by mixing compounds so it is not a compound or an element.

Example of liquid-gas mixture is :

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

  1. fog

  2. smoke

  3. muddy water

  4. milk

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Correct Option: A

A true solution (or simply a solution) is a homogeneous mixture, in which the solute and solvent molecules cannot be distinguished even under a microscope.

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

  1. True

  2. False

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Correct Option: A
Explanation:

A true solution (or simply a solution) is a homogeneous mixture, i.e., in a true solution, the solute and solvent molecules cannot be distinguished even under a microscope because the size of the particle is very small.

Example of liquid-liquid mixture is :

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

  1. oil in water

  2. muddy water

  3. smoke

  4. steel

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Correct Option: A

Which among the following statement(s) is/are true?

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

  1. Brass is an element

  2. Dry ice is a mixture

  3. Aerated drink, e.g., coca cola is a mixture

  4. Diesel is a mixture

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Correct Option: C,D
Explanation:

A ) Brass is an alloy made of copper and zinc.
B) Dry ice, sometimes referred to as "cardice" (chiefly British chemists), is the solid form of carbon dioxide, so it is a compound.
C) Aerated drink would be anything that would have fizz (gas) filled in it. For example, your pepsi, coke, thums up, mirinda etc.
D) Diesel is mixture of many hydrocarbons.
Options C & D are correct.

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

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Correct Option: C
Explanation:

Impure substances are commonly called mixtures. A mixture is a material containing two or more elements or compounds that are in close contact and are mixed in any proportion. The constituents of mixtures exhibit their individual properties. These constituents can be separated by physical means.

The alloy bronze contains Copper and Tin. This is a:

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

  1. homogeneous mixture

  2. heterogeneous mixture

  3. solid solution of two immiscible metals

  4. both A and B

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Correct Option: D
Explanation:

Generally, an alloy is a mixture of two or more elements, at least one of which is a metal, and which exhibits metallic bonding characteristics. It may be either homogeneous (eg a solid solution; i.e. single phase; e.g brass) or heterogeneous ( a mixture of metallic phases e. g. Steel— the iron/carbon system) 

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

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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)

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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.