CCEA GCSE Science Single Award Practice Questions - CCEA GCSE Science - Single Award (2017) (Northern Ireland) Exam

Which reagent and positive colour change correctly identify starch?

Benedict’s: blue to brick-red precipitate Iodine solution: yellow-brown to blue-black Biuret: blue to lilac/purple Ethanol: clear to white emulsion

Correct Answer:

Iodine solution: yellow-brown to blue-black

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