Which test is used to detect starch in food?
Answer and explanation
Correct answer: C. iodine solution, which turns blue-black
Starch is detected with iodine solution, which turns blue-black.
Answer: iodine solution, which turns blue-black.
Why not the others: Benedict's solution, which turns brick red on heating: it is the test for glucose. the ethanol emulsion test, which turns cloudy white: it is the test for fat. biuret solution, which turns purple: it is the test for protein.
Answer: iodine solution, which turns blue-black.
Why not the others: Benedict's solution, which turns brick red on heating: it is the test for glucose. the ethanol emulsion test, which turns cloudy white: it is the test for fat. biuret solution, which turns purple: it is the test for protein.
Practise more Food tests.
Free questions with an explanation for every one, and full timed Junior Cycle (Ireland) mock tests.