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Select the incorrect statement
Solution:
The physiological calorific values are: Carbohydrates = 4 kcal/g, Proteins = 4 kcal/g, Lipids = 9 kcal/g. The gross calorific values are: Carbohydrates = 4.18 kcal/g, Proteins = 5.65 kcal/g, Lipids = 9.45 kcal/g. Statement (1) and (2) are correct physiological values. Statement (4) gives a gross value for carbohydrates (4.1 kcal/g) which is close to the actual 4.18 kcal/g and often used as an approximation. Statement (3) gives a gross value for lipids as 9 kcal/g, while the actual gross value is 9.45 kcal/g. Therefore, statement (3) is the incorrect statement.