Q. Glucose, Fructose, and Galactose have a common molecular formula C6H12O6. Which among the following make them different?

1. Different arrangements of atoms
2. Different shapes
3. Not all three are soluble in water

Select the correct option from the codes given below:
Answer: Only 1 & 2
Notes: Glucose, fructose, and galactose are isomers with the formula C6H12O6, differing in the arrangement of atoms and molecular shape. All three are monosaccharides and are highly soluble in water due to the presence of multiple hydroxyl groups. Thus, only statements 1 and 2 are correct, while statement 3 is incorrect.