Nutrients and food tests Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. A food turns blue-black when iodine solution is added. Which nutrient does it contain?
- A. Protein
- B. Starch
- C. Lipid
- D. Reducing sugar
2. Which test gives a purple colour if protein is present?
- A. Benedict's test
- B. Ethanol emulsion test
- C. Iodine test
- D. Biuret test
3. Which deficiency disease is caused by a lack of vitamin C?
- A. Scurvy
- B. Rickets
- C. Anaemia
- D. Kwashiorkor
4. What is the positive result for the ethanol emulsion test for lipids?
- A. The solution turns blue-black
- B. The solution turns brick-red when heated
- C. A cloudy white emulsion forms when the mixture is poured into water
- D. The solution turns purple
5. A student burns 1.0 g of a food under 20 g of water and the water rises by 30 °C. Using energy = mass of water × 4.2 × temperature rise, how much energy does the water gain?
- A. 630 J
- B. 2520 J
- C. 84 J
- D. 126 J