What is the approximate energy content per 100 g of carbohydrates?

• A. 3700 kJ
• B. 1000 kJ
• C. 1600 kJ
• D. 1700 kJ

Answer: (C)

Carbohydrates yield about 16 kJ of energy per gram (roughly 4 kcal/g). For 100 g, that’s around 1600 kJ. Because the question asks for an approximate value, 1600 kJ is the best match among the options. A more precise calculation using 4 kcal/g gives about 1670 kJ, which would point toward 1700 kJ, but 1600 kJ is the standard rounded figure used in many exams. The other numbers would imply vastly different amounts of carbohydrate for the same energy, so they don’t fit with the typical energy yield of carbohydrates.