Class 4 Exam > Class 4 Questions > Which of the following is used to test the pr...
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Which of the following is used to test the presence of starch?
- a)Iodine solution
- b)Copper sulphate solution
- c)Potassium hydroxide
- d)Alcohol
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which of the following is used to test the presence of starch?a)Iodine...
Starch turns blue black when iodine solution is added to it.
This question is part of UPSC exam. View all Class 4 courses
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Which of the following is used to test the presence of starch?a)Iodine...
Testing the presence of starch using iodine solution
Starch is a complex carbohydrate made up of glucose molecules. It is a common component of many foods, such as potatoes, rice, and bread. Iodine solution is commonly used to test for the presence of starch in a sample.
Procedure:
1. Take a small amount of the sample to be tested in a test tube or petri dish.
2. Add a few drops of iodine solution to the sample.
3. Observe the color change.
Observations:
If starch is present in the sample, the iodine solution will turn blue-black in color. If starch is not present, the solution will remain brown or yellow.
Explanation:
Iodine solution reacts with the starch molecules to form a deep blue-black color. This is because iodine molecules can fit into the spiral structure of the glucose chains in starch. The iodine molecules form a complex with the starch molecules, resulting in a blue-black color.
Conclusion:
Iodine solution is a reliable and easy way to test for the presence of starch in a sample. It is commonly used in food science and biology to detect starch in various samples.
Starch is a complex carbohydrate made up of glucose molecules. It is a common component of many foods, such as potatoes, rice, and bread. Iodine solution is commonly used to test for the presence of starch in a sample.
Procedure:
1. Take a small amount of the sample to be tested in a test tube or petri dish.
2. Add a few drops of iodine solution to the sample.
3. Observe the color change.
Observations:
If starch is present in the sample, the iodine solution will turn blue-black in color. If starch is not present, the solution will remain brown or yellow.
Explanation:
Iodine solution reacts with the starch molecules to form a deep blue-black color. This is because iodine molecules can fit into the spiral structure of the glucose chains in starch. The iodine molecules form a complex with the starch molecules, resulting in a blue-black color.
Conclusion:
Iodine solution is a reliable and easy way to test for the presence of starch in a sample. It is commonly used in food science and biology to detect starch in various samples.
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Which of the following is used to test the presence of starch?a)Iodine solutionb)Copper sulphate solutionc)Potassium hydroxided)AlcoholCorrect answer is option 'A'. Can you explain this answer?
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Which of the following is used to test the presence of starch?a)Iodine solutionb)Copper sulphate solutionc)Potassium hydroxided)AlcoholCorrect answer is option 'A'. Can you explain this answer? for Class 4 2024 is part of Class 4 preparation. The Question and answers have been prepared according to the Class 4 exam syllabus. Information about Which of the following is used to test the presence of starch?a)Iodine solutionb)Copper sulphate solutionc)Potassium hydroxided)AlcoholCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 4 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is used to test the presence of starch?a)Iodine solutionb)Copper sulphate solutionc)Potassium hydroxided)AlcoholCorrect answer is option 'A'. Can you explain this answer?.
Which of the following is used to test the presence of starch?a)Iodine solutionb)Copper sulphate solutionc)Potassium hydroxided)AlcoholCorrect answer is option 'A'. Can you explain this answer? for Class 4 2024 is part of Class 4 preparation. The Question and answers have been prepared according to the Class 4 exam syllabus. Information about Which of the following is used to test the presence of starch?a)Iodine solutionb)Copper sulphate solutionc)Potassium hydroxided)AlcoholCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 4 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is used to test the presence of starch?a)Iodine solutionb)Copper sulphate solutionc)Potassium hydroxided)AlcoholCorrect answer is option 'A'. Can you explain this answer?.
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