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Milk is considered a colloid because... Select one: It is a homogeneous mixture. It is a mixture of two or more substances that appears to be a single substance, even under a microscope. It is a pure substance that does not contain more than one type of chemical. It contains small clumps of protein that do not settle over time.

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Answer:  It contains small clumps of protein that do not settle over time.

Explanation: Milk appears to be a homogeneous mixture but actually is a heterogeneous mixture which consists of fat particles as dispersed phase suspended in the dispersion medium which is water.The dispersed phase is visible when placed under microscope.

They have particle size intermediate between true solutions and suspensions.

True solutions are homogeneous mixtures in which dispersed particles are evenly distributed. Suspensions have large dispersed particles which settle when left undisturbed.

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