A colloid is a mixture in which one of the substances is split into very minute particles which are dispersed throughout a second substance. The substance which is dispersed is called a dispersed phase whereas the one in which the first substance is distributed is called a dispersion medium.
The size of colloid particles generally ranges between 1 to 1000 nanometres i.e. 10−5 to 10−7cm.
10−5 - 10−7 cm
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