Tag: classification of mixtures

Questions Related to classification of mixtures

Tap water is:

chemistry composition of matter classification of mixtures mixtures: examples and properties types of solutions

  1. compound

  2. a mixture

  3. an element

  4. none of these

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Correct Option: B
Explanation:

Tap water is not the pure form of water, it contains a large number of salts, elements, bacteria and other impurities,

so, tap water is considered as a mixture.

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.

Which of the following is a mixture?

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

  1. Air

  2. Alloys

  3. Both A and B

  4. None of above

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Correct Option: C
Explanation:

Air is a homogeneous mixture. However, the Earth's atmosphere as a whole is a heterogeneous mixture. Alloys are made when two or more metals are mixed together. They usually are homogeneous mixtures. Examples include brass, bronze, steel, and sterling silver.

In a mixture of kerosene and water, kerosene forms the:

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

  1. Lower layer

  2. Upper layer

  3. It mixes with water and forms no layer

  4. Data insufficient

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Correct Option: B
Explanation:

When two liquids do not mix, they form two separate layers and are known as immiscible liquids. These two liquids can be separated by using a separating funnel. It will separate the immiscible liquids into two distinct layers depending on their densities. The heavier liquid forms the lower layer while the lighter one forms the upper layer. Kerosene has lower density than water and hence forms the upper layer.