Question

Fehling’s solution is used to identify which type of compounds? Write chemical equations.

Hint:

Fehling's solution is used in the detection of aldehydes by observing the formation of a red precipitate.

Answer 1

Step 1: Identify the Type of Compounds
Fehling’s solution is used to identify **reducing sugars** and **aldehydes**. It contains copper((B) ions that are reduced to copper((A) oxide when reacted with reducing agents.
Step 2: Chemical Equation
When Fehling’s solution reacts with an aldehyde group, the copper((B) ions are reduced, and a red precipitate of copper((A) oxide forms: \[ \text{R-CHO} + \text{Cu}^{2+} + 2\text{OH}^- \rightarrow \text{R-COOH} + \text{Cu}_2\text{O} \downarrow + \text{H}_2\text{O} \] where \(\text{R-CHO}\) is the aldehyde, and \(\text{Cu}_2\text{O}\) is the red precipitate. Final Answer: Fehling’s solution identifies reducing sugars and aldehydes. Correct Answer: Reducing sugars and aldehydes.