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Why can milk be considered both liquid and mixture?

Answer and explanation

Correct answer: It flows and contains many components

Direct answer: A, milk flows and contains many components. A substance can be classified in two independent ways: by physical state and by composition. Milk is a liquid because it flows and takes the shape of its container. It is also a mixture because it contains water, fats, proteins, sugars, minerals, and other substances; these components are not combined in one fixed chemical formula. Milk is commonly described as a colloidal mixture, but the school-level conclusion here is simply liquid plus mixture. Option A states both reasons. Option B is wrong because milk is not a single element; an element contains only one kind of atom. Option C is wrong because a compound has a definite composition and formula, unlike milk, whose composition can vary. Option D is wrong because milk is not a gas; it has a definite liquid form at ordinary conditions. Memory cue: classify matter by state and composition separately; milk is liquid by state and mixture by composition.

Related tags

ChemistryNature-Of-MatterClass-11

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