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NEET CHEMISTRYAldehydes, Ketones and Carboxylic AcidsEasy

Question

Which solution is part of Fehling solution 'A' (used in tests for reducing sugars and aldehydes)?

A

Alkaline copper sulphate

B

Alkaline solution of sodium potassium tartrate (Rochelle's salt)

C

Aqueous sodium citrate

D

Aqueous copper sulphate

Step-by-Step Solution

Fehling's test is used to detect the presence of aliphatic aldehydes and reducing sugars. Fehling's reagent consists of two separate solutions: Fehling solution A and Fehling solution B.

  1. Fehling solution A is an aqueous solution of copper sulphate (CuSO4CuSO_4).
  2. Fehling solution B is an alkaline solution of sodium potassium tartrate, also known as Rochelle salt. These two solutions are mixed in equal amounts just before conducting the test. Therefore, Fehling solution 'A' corresponds to aqueous copper sulphate.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Aldehydes, Ketones and Carboxylic Acids. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAldehydes, Ketones and Carboxylic Acidssolutionfehlingsolutionreducingsugars

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