Which of the following is NOT an element of glucose?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Calcium
Glucose is a simple sugar with the formula \(\ce{C6H12O6}\): each molecule has 6 carbon, 12 hydrogen and 6 oxygen atoms. Like all carbohydrates it is made of only carbon, hydrogen and oxygen, so calcium, a metal, is not one of its elements.