Colloid kya hai

Key Points.

A colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance. Some definitions specify that the particles must be dispersed in a liquid , [1] while others extend the definition to include substances like aerosols and gels. The term colloidal suspension refers unambiguously to the overall mixture although a narrower sense of the word suspension is distinguished from colloids by larger particle size. A colloid has a dispersed phase the suspended particles and a continuous phase the medium of suspension. The dispersed phase particles have a diameter of approximately 1 nanometre to 1 micrometre. Some colloids are translucent because of the Tyndall effect , which is the scattering of light by particles in the colloid.

Colloid kya hai

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In chemistry, a colloid is a mixture of tiny particles that are dispersed in another medium. In contrast, particles in a solution are smaller than this size, while particles in a suspension are larger. As in a solution, the particles in a colloid do not separate upon standing. The particles in a colloid are called the dispersed phase , which is spread throughout the dispersion medium. Colloids are classified as foams, aerosols, emulsions, gels, or sols, depending on the nature of the dispersed phase and dispersion medium. Familiar examples of colloids include mayonnaise, milk, fog, smoke, and gelatin. The Tyndall effect is the scattering of light by the particles in a colloid or fine suspension. A good example is the way a glass of skim milk a colloid shows a flashlight beam, while a glass of salt water a solution does not. It is a quick and easy test that distinguishes a colloid or suspension from a solution. Not all colloids display the Tyndall effect.

Colloid kya hai

Imagine that you are sailing on a yacht. The engine suddenly breaks down and you are stranded in the middle of the ocean. You call the Coast Guard on your radio, but cannot give them an exact location, because your GPS isn't working. Fortunately, you have a smoke flare, which you fire off. The dense colored smoke shows the Coast Guard where you are so that they can rescue you. In using the flare, you are taking advantage of a mixture called a colloid. A colloid is a heterogeneous mixture whose particle size is intermediate between those of a solution and a suspension. The dispersed particles are spread evenly throughout the dispersion medium , which can be a solid, liquid, or gas.

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A colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance.

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