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Chemistry Question 66 – NEET-UG 2024

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Fehling’s solution ‘A’ is

Fehling's solution is a chemical reagent used to detect reducing sugars and aldehydes.

Step 1: Recall the composition of Fehling's reagent✦ Active

Fehling's reagent is a solution used in chemistry to test for the presence of aldehydes and reducing sugars. It is prepared as two separate solutions, Fehling's A and Fehling's B, which are mixed just before use.

Step 2: Identify the components of Fehling's solution 'A'○ Expand

Fehling's solution 'A' is an aqueous solution of copper(II) sulfate (CuSO4). Fehling's solution 'B' is an alkaline solution of potassium sodium tartrate (Rochelle salt).

💡 Teacher's Secret Hint

Remember that Fehling's A provides the copper ions, while Fehling's B provides the alkaline medium and the complexing agent (tartrate).

Step 3: Match with the given options○ Expand

Based on the composition, option (4) 'aqueous copper sulphate' correctly describes Fehling's solution 'A'.

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