Multiple choice

The number of -OH groups in glucose is:

  1. 6

  2. 5

  3. 9

  4. 10

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glucose (C6H12O6) has five hydroxyl (-OH) groups - one on each carbon except the sixth carbon which has a -CH2OH group. The molecular formula shows 6 oxygens: 5 are in -OH groups and 1 is in the aldehyde group. Glucose does not have 6, 9, or 10 -OH groups.