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Organic Chemistry Questions and Answers – Prepartions of Glycols | Organic Chemistry Multiple Choice Questions and Answers

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(1) Which of the following reagent can be used to carry out this synthesis of glycol?

Organic Chemistry

[A] Benedict reagent
[B] Baeyer’s reagent
[C] Barfoed reagent
[D] Seliwanoff reagent
Answer: Baeyer’s reagent
(2) Which of the following is the industrial method of formation of glycol?
[A] Hydroxylation of alkene by Bayer’s reagent
[B] From 1,2-dibromoethane
[C] Oxidation of ethylene and using Ag as catalyst
[D] Ethylene treatment with HOCl
Answer: Oxidation of ethylene and using Ag as catalyst
(3) Which type of product is formed when Cold dilute alkaline solution of Bayer’s reagent reacts with alkene?
[A] Syn-glyol
[B] Syn- and anti-geometry will not be there in glycol
[C] Anti-glyol
[D] Trans glycol
Answer: Syn-glyol
(4) Which of the following statement is not true about preparation of alcohol?
[A] French chemist Charles-Adolphe Wurtz (1817–1884) first prepared ethylene glycol in 1856
[B] First synthesis of glycol was from “ethylene iodide” (C2H4I2) with silver acetate and then hydrolyzed the resultant “ethylene diacetate” with potassium hydroxide
[C] It was synthesized from ethylene dichloride in Germany and used as a substitute for glycerol in the explosives industry
[D] There is no biological process for the synthesis of glycol
Answer: There is no biological process for the synthesis of glycol
(5) What will be the compound A which can be used to carry out this synthesis of glycol?

[A] RCOR’
[B] RCO2OH
[C] RCHO
[D] RCOOH
Answer: RCO2OH
(6) What will be the catalyst A which can be used to carry out this synthesis of glycol?

[A] Catalyst Cu, 200 – 400℃
[B] Catalyst Pt, 100 – 200℃
[C] Catalyst Ni, 200 – 400℃
[D] Catalyst Ag, 200 – 400℃
Answer: Catalyst Ag, 200 – 400℃
(7) What will be the product A and B for the given reaction?

[A] ethane, glycol
[B] glycol, ethylene chlorohydrine
[C] Ethylene chlorohydrine, glycol
[D] ethan-1-ol, Glycol
Answer: Ethylene chlorohydrine, glycol
(8) Which compound is used with 1,2- dibromoethane for the formation of glycol?
[A] Na2CO3
[B] NaHCO3
[C] NaOH
[D] CH3COONa
Answer: Na2CO3
(9) Which of the following is the most convenient and inexpensive method of formation of glycol?
[A] Hydroxylation of alkene by Bayer’s reagent
[B] From 1,2-dibromoethane
[C] Oxidation of ethylene and using Ag as catalyst
[D] Ethylene treatment with HOCl
Answer: Hydroxylation of alkene by Bayer’s reagent
(10) Which of the following is not a method of preparation of glycol?
[A] Shell’s omega method
[B] From carbon monoxide
[C] From Dimethyl oxalate
[D] From nitrogen
Answer: From nitrogen
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