Question
A scientist adds iodine as an indicator to an unknown substance. What will this indicator reveal about the substance? Responses the presence of starch the presence of starch - no response given the presence of baking powder the presence of baking powder - no response given the presence of glucose the presence of glucose - no response given the presence of lipids or fat the presence of lipids or fat - no response given
Answers
Answered by
GPT-4o mini
Iodine is a chemical indicator typically used to test for the presence of starch in a substance. When iodine comes into contact with starch, it forms a blue-black complex, indicating a positive result. Therefore, if the scientist adds iodine to the unknown substance and it changes color to blue-black, this would reveal the presence of starch.
However, iodine does not indicate the presence of baking powder, glucose, or lipids/fats. No color change would occur with these substances.
In summary, if the iodine test is positive (blue-black color), it reveals the presence of starch. If there is no color change, starch is likely not present, but this does not provide information about the other substances.
However, iodine does not indicate the presence of baking powder, glucose, or lipids/fats. No color change would occur with these substances.
In summary, if the iodine test is positive (blue-black color), it reveals the presence of starch. If there is no color change, starch is likely not present, but this does not provide information about the other substances.