Question

Which of the following is false?

• A. Fehling's solution is blue in color.
• B. The starch solution turns blue on adding Fehling's solution to it.
• C. Fehling's solution turns brick red in presence of saliva.
• D. Fehling's solution helps in testing the action of saliva on starch.

Answer 1

The correct option is C

Fehling's solution turns brick red in presence of saliva.

Fehling's solution turns brick red in presence of reducing sugar. When saliva is added to the starch solution, the salivary amylase converts starch into sugar and thus the solution turns brick red.