What is a mixture?

Question

What is a mixture?

BlackTom AI · Accepted Answer

To tackle the question, I will examine what each option says about a mixture and compare it to the standard definition.
Option 1: 'a combination of pure substances bonded chemically' – This describes a compound, not a mixture. When substances bond chemically to form a new substance, the components lose their individual identities, so this is not a mixture.
Option 2: 'a blend of any two or more kinds of matter where each maintains its own unique properties' – This correctly captures the essence of a mixture: it contains two or more substances that retain their own properties and can be separated physically. The components are not chemically bonded in a way that creates a new substance.
Option 3: 'any substance with a uniform composition' – This describes a pure substance or a homogeneous material, where the composition is uniform throughout. It does not describe a mixture, which consists of distinct substances that may be unevenly or evenly distributed but retain individual identities.
Option 4: 'any group of elements that are chemically bonded to one another' – This again points to compounds or molecules formed by chemical bonds between elements, not a mixture. In a mixture, the components are not chemically bonded to each other.

Overall, only Option 2 aligns with the standard definition of a mixture, emphasizing the presence of multiple kinds of matter that keep their own properties while being combined.

What is a mixture?单项选择题

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