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

View Answer

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

View Answer

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

View Answer

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

View Answer

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%

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

Answer: isopropyl alcohol and methyl iodide

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