Which color describes the solid form of iodine?

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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 color describes the solid form of iodine?

Explanation:
In a substance, color can change with state. Iodine behaves differently as a solid than as a gas. When iodine is solid, it forms grey crystalline chunks that have a dull, metallic-like appearance. The vivid purple color people associate with iodine comes from its vapour, not the solid. So the solid is described as grey, while the purple is seen in the sublimed gas. The orange and black options don’t match the typical solid appearance, and while very dark solids can look almost black, the standard description for solid iodine is grey.

In a substance, color can change with state. Iodine behaves differently as a solid than as a gas. When iodine is solid, it forms grey crystalline chunks that have a dull, metallic-like appearance. The vivid purple color people associate with iodine comes from its vapour, not the solid. So the solid is described as grey, while the purple is seen in the sublimed gas. The orange and black options don’t match the typical solid appearance, and while very dark solids can look almost black, the standard description for solid iodine is grey.

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