Tag: mixtures: examples and properties

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Multiple choice chemistry pure substances and mixtures: separation of mixtures mixtures: examples and properties types of solutions all about mixtures

Mixture perfectly uniform in its composition and properties throughout its bulk is called :

  1. homogeneous mixture

  2. heterogeneous mixture

  3. both A and B

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mixture perfectly uniform in its composition and properties throughout its bulk is called homogeneous mixture, e.g., solution of alcohol in water, dust free air etc.

Multiple choice chemistry pure substances and mixtures: separation of mixtures mixtures: examples and properties types of solutions all about mixtures

Among the following, bronze is a/an example of :

  1. an element

  2. a mixture

  3. a compounds

  4. all of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bronze is a alloy, it is composed of the mixture of copper and tin. It was made before 3000 bc, though its use in artifacts did not become common until much later. The proportions of copper and tin varied widely (from 67 to 95 percent copper in surviving artifacts).

Multiple choice chemistry pure substances and mixtures: separation of mixtures mixtures: examples and properties types of solutions all about mixtures

Mixture with different compositions and different properties at different locations in the mixture is called a :

  1. homogeneous mixture

  2. heterogeneous mixture

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Heterogeneous mixture is a mixture that consists of physically different parts each with different properties.

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

Identify the mixture from the following:

  1. Oxygen

  2. Carbon dioxide

  3. Hydrogen

  4. Air
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Which of the following is a mixture?

  1. Water

  2. Oxygen

  3. Carbon dioxide

  4. Air
Reveal answer Fill a bubble to check yourself
D Correct answer
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.