Question

The correct observation in the following reactions is :
Sucrose \( \frac{\text { Glycasidic band }}{\text { Clervage (Hyurolysis) }} \rightarrow A+B \frac{\text { Seliwanoff's }}{\text { refgent }} \)
(JEE MAIN 2020)

• A. Gives no colour
• B. Formation of red colour
• C. Formation of blue colour
• D. Formation of violet colour

Answer 1

The correct option is B Formation of red colour

Seliwanoff's test is used to distinguish aldoses and ketoses. Ketoses give positive test for Seliwanoff test.
Sucrose on hydrolysis gives glucose and fructuse. Fructose is ketose sugar so it gives positive Seliwanoff test which is indicated by the formation of red colour.