Question
Foods with starch in them will turn blue- black when they come in contact with _________.
The correct answer is
iodine
Starch Test Identification
The presence of starch in foods is typically detected using a chemical indicator.
Iodine Indicator Reaction
When foods containing starch come into contact with iodine solution, a distinct color change occurs.
- Starch + Iodine Solution → Blue-Black Color
This specific color change signifies a positive result for starch.
Other Options Analysis
Litmus solutions (blue and red) are used to test for acidity or alkalinity (pH), not starch content.
Salt (sodium chloride) does not react with starch to produce a color change.
Therefore, iodine is the correct reagent for this test.
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Important Questions from Food and its Components
- What is the primary reason that roughage is included in a balanced human diet?
- Which statement is true regarding a balanced diet?
- Which of the following represent disaccharides?
- Which of the following is classified as micronutrients?
- Which of the following correctly represents the function of dietary fibre in the human diet?
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