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

Questions
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?

Organic Chemistry

A RCH2OH
B RCOOH
C RCHO
D RCH3

Answer: RCHO
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3 What is the name of the given reaction of preparation of aldehyde?

Organic Chemistry

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?

Organic Chemistry

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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