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

Questions
1 Catalytic reduction (Hydrogenation) of carbon monooxide with H2 under high pressure and temperature gives methyl alcohol. What is this process is known as?
A Baeyer’s test
B Hofmann’s reaction
C Kolb processn
D BASF process

Answer: BASF process
2 Which of the following statements is incorrect regarding preparation of alcohols?
A Aldehydes and Ketones on catalytic reduction by [H] give primary alcohol and secondary alcohol respectively
B Ketones on reaction with Grignard’s reagent gives tertiary alcohol
C Aldehydes on reaction with Grignard’s reagent gives primary or secondary alcohol
D Alkyl halides on reaction alcoholic potash gives alcohol

Answer: Alkyl halides on reaction alcoholic potash gives alcohol
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3 Which of the following steps is not used in the fermentation of starch into ethyl alcohol?
A Hydrolysis of starch into maltose by diastase present in barley
B Conversion of maltose into glucose by maltase present in yeast
C Conversion of glucose into ethanol by zymase present in yeast
D Conversion of sucrose into glucose and fructose by sucrase present in yeast

Answer: Conversion of sucrose into glucose and fructose by sucrase present in yeast
4 15% pure ethyl alcohol (wash) on fractional distillation gives 95% ethyl alcohol by weight which is commonly known as which of the following terms?
A Wash
B Absolute alcohol
C Rectified spirit
D Methylated spirit

Answer: Rectified spirit
5 Ethyl alcohol obtained by fermentation of starch or molasses is called wash, and what is it’s purity?
A 15%
B 99%
C 99.9%
D 95%

Answer: 15%
6 Which is the only alcohol that can be prepared by the indirect hydration of alkene?
A Ethyl alcohol
B Propyl alcohol
C Isobutyl alcohol
D Methyl alcohol

Answer:Ethyl alcohol
7 Acid catalysed hydration of alkenes except ethene leads to the formation of which of the following?
A Mixture of secondary and tertiary alcohols
B Mixture of secondary and tertiary alcohols
C Secondary or tertiary alcohol
D Primary alcohol

Answer: Mixture of secondary and tertiary alcohols
8 Among the alkenes which one produces tertiary butyl alcohol on acid hydration?
A (CH3)2C=CH2
B CH3-CH=CH-CH3
C CH3CH2CH=CH2
D CH3CH=CH2

Answer: (CH3)2C=CH2
9 Which of the following way is not a method of preparation of alcohol?
A Grignard reaction
B Reduction of an aldehyde, ketone, or carboxylic acid with the appropriate reducing agent
C Substitution reaction of hydroxide or water on the appropriate alkyl halide
D Haber’s process

Answer: Haber’s process
10 Isopropyl methyl ether when treated with cold hydrogen iodide gives which of the following alcohol?
A isopropyl iodide and methyl iodide
B isopropyl alcohol and methyl iodide
C isopropyl alcohol and methyl alcohol
D isopropyl iodide and methyl alcohol

Answer: isopropyl alcohol and methyl iodide

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