Tag: mix and separate

Questions Related to mix and separate

Combine harvesters are used to

chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

  1. Harvest

  2. Thresh

  3. Winnow

  4. All the above

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Correct Option: D
Explanation:

Combine harvesters are machines which harvest, threshes and winnows in a single operation. Combine harvesters are used in developed countries like the USA. In India, these machines can be seen in the farms of Punjab.

Winnowing is the process used to separate particles of ____________.

chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

  1. heavier and lighter weight

  2. only two heavier particles

  3. only two lighter paticles

  4. None of the above

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Correct Option: A
Explanation:

The process of separation of lighter particles from heavier particles; with the help of wind; is called winnowing. This method is used for separating grains from husk.
Hence option A is correct.

Salt, sugar, and many other substances dissolve in water to form :

chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

  1. homogenous mixture

  2. heterogenous mixture

  3. Ionic compound

  4. molecular compound

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Correct Option: A
Explanation:

A mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A homogeneous mixture is a type of mixture in which the composition is uniform and every part of the solution has the same properties. Salt, sugar, and many other substances dissolve in water to form homogeneous mixtures.

Two main constituents of air are :

chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

  1. oxygen and nitrogen

  2. carbon dioxide and nitrogen

  3. rhodium and nitrogen

  4. oxygen and calcium

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Correct Option: A
Explanation:

Air is a homogeneous mixture of a number of gases. It's two main constituents are oxygen and nitrogen. Other gases are present in small quantities.

Which of the following is a homogeneous solution?

chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

  1. Muddy water

  2. Bread

  3. Concrete

  4. A solution of sugar in water

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Correct Option: D
Explanation:

The solution in which the concentration of solute is the same in every part of the solution is known as a homogeneous solution, sugar is completely soluble in water and forms homogeneous solution.

Air is a ______ mixture.

chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

  1. homogeneous

  2. heterogeneous

  3. both A and B

  4. none of the above

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Correct Option: A
Explanation:

Air is a homogeneous mixture and can be separated into its components by fractional distillation.

Aqueous solutions of low molecular mass solutes are :

chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

  1. true solutions

  2. false solutions

  3. saturated solutions

  4. unsaturated solution

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Correct Option: A
Explanation:

Aqueous solution of low molecular mass are true solutions. A solution in which size of the solute particles is about $10^{10}$m is called a true solution.

A true solution is a homogeneous mixture of solute and solvent. Chalk powder in water is a heterogeneous mixture. Hence chalk powder is not a true solution.

chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

  1. True

  2. False

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Correct Option: A
Explanation:

A true solution has solute completely dissolved in the solvent. In case of chalk powder, it does not completely dissolve in water. Hence chalk powder in water is a heterogeneous mixture & is not a true solution.

Substance that is able to get dissolved in solvent is said to be:

chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

  1. solute

  2. insoluble

  3. solvent

  4. soluble

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Correct Option: D
Explanation:

Soluble substances are those that easily dissolve in a solvent, such as water, and include sugar, salt, alcohol and some dish-washing detergents. In chemistry, solubility of a substance is a quantitative term that refers to the amount of substance that can dissolve in a given volume of a solvent.

Any metal mixed with mercury is called an amalgam. The amalgam used for dental filling is__________.

chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

  1. Ag - Sn amalgam

  2. Au-Sn amalgam

  3. Au-Ag amalgam

  4. Cu-Au amalgam

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Correct Option: A
Explanation:

Amalgam used for dental filling in Ag - Sn amalgam.