How many kilojoules are present in one kilocalorie?

Correct option is B

Ans. (b) Sol. One kilocalorie (kcal) is equal to 4.184 kilojoules (KJ). This conversion is based on the relationship between calories and joules, where 1 calorie = 4.184 joules, and since 1 kilocalorie (kcal) = 1000 calories, it equals 4.184 kilojoules. This conversion is commonly used in nutrition and energy metabolism calculations.
Explanation of Other Options:
· (a) 3.184 KJ: Incorrect, as the correct value is 4.184 KJ.
· (c) 3.146 KJ & (d) 4.146 KJ: These values are slightly incorrect approximations of the actual conversion factor.