Question

what type of colloids are bread and sponge?​

Answer 1

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The mixture is collidal solution which acts as a dispersing medium (liquid). When it baked the yeast present in the mixture respire and release carbon dioxide which acts as a dispersed phase (gas). They together form bread. As we know that when gas mixes in a liquid it form a foam so bread is a solid foam.

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Answer 2

Colloids can be mixtures of solids, liquids and gases. Picture 2.10 Sponge cake, butterfly wings, fog and smoke are all colloids. In all colloids, particles of one substance are spread out, or dispersed, in another substance. ... A sponge cake is a colloidal solution of a gas spread out in a solid.