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Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Aldehydes, Ketones and Carboxylic Acids

Question:

Match the entries of column I with appropriate entries of column II and choose the correct option out of the four options given.

Column I Column II
(a) Tollen's reagent (i) Alkaline CuSO4 complexed with sodium citrate
(b) Benedict's solution (ii) Ammonical silver nitrate
(c) Fehling solution A (iii) Alkaline solution of sodium potassium tartarate
(d) Fehling solution B (iv) Aqueous solution of copper sulphate

 

Options:

(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

Correct Answer:

(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

Explanation:

(a) Tollen's reagent: Tollen's reagent is ammonical silver nitrate. It is used as silver mirror test for aldehydes.

(b) Benedict's solution: It is Alkaline CuSO4 complexed with sodium citrate. It also give positive test with aliphatic aldehydes but give negative test with aromatic aldehydes.

(c) Fehling solution A: It consists of an aqueous solution of copper sulphate.

(d) Fehling solution B: It consists of an alkaline solution of sodium potassium tartarate or Rochelle salt.

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