Which of the following is an example of a mixture with a range of melting points?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

Which of the following is an example of a mixture with a range of melting points?

Explanation:
Mixtures do not have a single melting point because each component melts at its own temperature, so the overall substance melts over a range. Crude oil is a mixture of many different hydrocarbons, each with its own melting (or solidification) behavior. Because there isn’t one uniform component, crude oil will not melt at one fixed temperature but over a broad range. In contrast, pure substances like water (ice), sodium chloride, or diamond have a specific, sharp melting point because their structures are uniform, so they melt at a single temperature.

Mixtures do not have a single melting point because each component melts at its own temperature, so the overall substance melts over a range. Crude oil is a mixture of many different hydrocarbons, each with its own melting (or solidification) behavior. Because there isn’t one uniform component, crude oil will not melt at one fixed temperature but over a broad range. In contrast, pure substances like water (ice), sodium chloride, or diamond have a specific, sharp melting point because their structures are uniform, so they melt at a single temperature.

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