Question

Which of the following is(are) CORRECT?

• A. Both glucose and fructose have the same molecular formula
• B. The positions of the oxygen and carbon differ in the structures of glucose and fructose
• C. Both glucose and fructose have the same physical properties
• D. Both glucose and fructose are monosaccharides

Hint:

Glucose and fructose are isomers with the same molecular formula but different structures and properties.

Answer 1

The Correct Option is A, B, D

Step 1: Understanding glucose and fructose. 
Glucose and fructose are isomers, meaning they have the same molecular formula but different structural arrangements. Both have the molecular formula C\(_6\)H\(_12\)O\(_6\). 
 

Step 2: Analyzing the options. 
- (A) Both glucose and fructose have the same molecular formula: Correct — Both glucose and fructose have the molecular formula C\(_6\)H\(_12\)O\(_6\). 

- (B) The positions of the oxygen and carbon differ in the structures of glucose and fructose: Correct — Glucose is an aldose, while fructose is a ketose, meaning the carbonyl group is in a different position. 

- (C) Both glucose and fructose have the same physical properties: Incorrect — Glucose and fructose have different physical properties due to their different structures. 

- (D) Both glucose and fructose are monosaccharides: Correct — Both are monosaccharides, which are simple sugars. 
 

Step 3: Conclusion. 
The correct answer is:

(A) Both glucose and fructose have the same molecular formula. 
(B) The positions of the oxygen and carbon differ in the structures of glucose and fructose
(D) Both glucose and fructose are monosaccharides