For example: air is a gaseous mixture, soil is a solid mixture and lemon juice is a mixture of water and lemon juice.
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Answer:
Explanation:
Types of Mixtures
Depending upon the nature of the components that forms the mixture we can have different types of mixtures.
(i) Homogeneous mixture: It is a mixture that has the same composition throughout, e.g. a solution of sugar in water. Such a mixture has two or more components.
(ii) Heterogeneous mixture: In such a mixture the particles of each component of the mixture remain separate and can be observed as individual grains under a microscope, e.g. mixture of grains and sand.
This type of mixtures contain physically distinct parts and have a non-uniform composition.
A mixture is a combination of two or more substances in any proportion. This is different from a compound, which consists of substances in fixed proportions. The substances in a mixture also do not combine chemically to form a new substance, as they do in a compound. Instead, they just intermingle and keep their original properties. The lemonade pictured above is a mixture because it doesn’t have fixed proportions of ingredients. It could have more or less lemon juice, for example, or more or less sugar, and it would still be lemonade. Other examples of liquid mixtures include salt water and salad dressing. Air is a mixture of gases, mainly nitrogen and oxygen. A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture. Vegetable soup is a heterogeneous mixture. Any given spoonful of soup will contain varying amounts of the different vegetables and other components of the soup. A phase is any part of a sample that has a uniform composition and properties. By definition, a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers. Each of the layers is called a phase. In the vegetable soup example, one phase would be the liquid soup itself. This phase has vitamins, minerals and other components dissolved in the water. This phase would be homogeneous. The carrots, peas, corn, or other vegetables represent other phases of the soup. The various vegetables are not mixed evenly mixed in the soup, but are spread around at random. There are a large number of heterogeneous mixtures around us. Soil is composed of a variety of substances and is often of different composition depending on the sample taken. One shovel may come up with dirt and grass while the next shovel could contain an earthworm. Smog is another example of a heterogeneous mixture. This murky collection of pollutants can be a mixture of water and contaminants from burning gasoline or plastics mixed with nitric oxide derivatives and ozone. You can see that the smog distribution in the air illustrate below is not evenly spread out, but varies from one part of the atmosphere to another.
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