Organic Chemistry Multiple Choice Questions and Answers

(1) Primary alcohol is gently heated to produce aldehyde in presence of acidified solution of which of the following compound?

[A] hydroxide

[B] dichromate

[C] ethanol

[D] ethanal

Answer: dichromate

(2) In the given reaction, what will be the product P?

[A] RCH₂OH

[B] RCOOH

[C] RCHO

[D] RCH3

Answer: RCHO

(3) What is the name of the given reaction of preparation of aldehyde?

[A] Reimer-Tiemann reaction

[B] Cannizzaro reaction

[C] Rosenmund reaction

[D] Reformatsky reaction

Answer: Rosenmund reaction

(4) Which Catalyst is used in Rosenmund reduction?

[A] Pd / BaSO₄

[B] Zn-Hg couple

[C] LiAlH₄

[D] Ni/H₂

Answer: Pd / BaSO₄

(5) On heating calcium acetate and calcium formate, the product formed is which of the following?

[A] CH₃COCH₃

[B] CH₃CHO

[C] HCHO+CaCO₃

[D] CH₃CHO+CaCO₃

Answer: CH₃CHO+CaCO₃

(6) In the Rosenmund’s reduction, BaSO4 taken with catalyst Pd acts as which of the following?

[A] Promotor

[B] Catalytic poison

[C] Cooperator

[D] Absorber

Answer: Catalytic poison

(7) Catalyst SnCl₂/HCl is used in which of the following method of synthesis of aldehyde?

[A] Stephen’s reduction

[B] Cannizzaro reaction

[C] Clemmensen’s reduction

[D] Rosenmund’s reduction

Answer: Stephen’s reduction

(8) What is the product X in the following reaction?

[A] C₆H₅CH₃

[B] C₆H₅CH₂Cl

[C] C₆H₅CHO

[D] C₆H₅COOH

Answer: C₆H₅CHO

(9) Which of the following gases when passed through warm dilute solution of H₂SO₄ in presence of HgSO₄ gives acetaldehyde?

[A] CH₄

[B] C₂H₆

[C] C₂H₄

[D] C₂H₂

Answer: C₂H₂

(10) O₃ reacts with CH₂=CH₂ to form ozonide. On hydrolysis it forms which of the following?

[A] Ethylene oxide

[B] HCHO

[C] Ethylene glycol

[D] Ethyl alcohol

Answer: HCHO

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Organic Chemistry Questions and Answers – Preparation of Aldehydes | Organic Chemistry Multiple Choice Questions and Answers

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