Organic Chemistry Questions and Answers – Preparation of Amines – 1

This set of Organic Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “Preparation of Amines – 1”.

1. The amine formed from an amide by means of bromine and alkali has how many number of carbon atoms?
a) Same number of C atoms as that of amide
b) One less C atom than that of amide
c) One more C atom than that of amide
d) Two more C atoms than that of amide
View Answer

Answer: b
Explanation: The amine formed from an amide by means of bromine and alkali has one less C atom than that of amide.The amine formed from amide by means of bromine & alkali has one less C atom

2. The compound X is which of the following?
The compound X is CH3CH2NH2 in given reaction
a) CH3CONH2
b) CH3CH2NH2
c) C2H6
d) CH3NHCH3
View Answer

Answer: b
Explanation: Reduction of nitriles leads to formation of primary amine.
Reduction of nitriles leads to formation of primary amine

3. Ethylamine can be prepared by the action of bromine and caustic potash on which compound?
a) Acetamide
b) Propionamide
c) Formamide
d) Methyl cyanide
View Answer

Answer: b
Explanation: Ethylamine can be prepared by the action of bromine and caustic potash on propioamide.
CH3 – CH2 – CO – NH2 + Br2 + 4KOH → CH3CH2NH2 + K2CO3 + 2KBr + 2H2O
       propioamide
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4. Reduction of nitroalkanes yields which compound?
a) Acid
b) Alcohol
c) Amine
d) Diazo compounds
View Answer

Answer: b
Explanation: Reduction of nitroalkanes yields amines, as shown in below reaction.
Reduction of nitroalkanes yields amines, as shown in below

5. What is the name of the reaction when acetamide changes into methylamine?
a) Hofmann bromamide reaction
b) Hofmann reaction
c) Friedel-Craft’s reaction
d) Hinsberg reaction
View Answer

Answer: a
Explanation: When an amide is treated with bromine in an aqueous or ethanolic solution of sodium hydroxide, degradation of amide takes place leading to the formation of primary amine. This reaction involving degradation of amide and is popularly known as Hoffmann bromamide degradation reaction.
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6. When methyl iodide is heated with ammonia, what is the product obtained?
a) Methylamine
b) Dimethylamine
c) Trimethylamine
d) A mixture of Methylamine, Dimethylamine & Trimethylamine
View Answer

Answer: d
Explanation: When methyl iodide is heated with ammonia, the product obtained is mixture of methylamine, dimethylamine, trimethylamine.
When methyl iodide is heated with ammonia product obtained is mixture of methylamine

7. The Hinsberg’s method is used for which of the following?
a) Preparation of primary amines
b) Preparation of secondary amines
c) Preparation of tertiary amines
d) Separation of amine mixtures
View Answer

Answer: d
Explanation: The Hinsberg reaction is a test for the detection of primary, secondary and tertiary amines. In this test, the amine is shaken well with Hinsberg reagent in the presence of aqueous alkali (either KOH or NaOH). A reagent containing an aqueous sodium hydroxide solution and benzenesulfonyl chloride is added to a substrate.
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8. Which one of the following compound gives a secondary amine on reduction?
a) Nitromethane
b) Nitrobenzene
c) Methyl isocyanide
d) Methyl cyanide
View Answer

Answer: c
Explanation: Methyl isocyanide gives a secondary amine on reduction.
Methyl isocyanide gives a secondary amine on reduction

9. In the given reaction what is the X?
The X is Nitrile in given reaction
a) Isonitrile
b) Nitrile
c) Nitrite
d) Oxime
View Answer

Answer: b
Explanation: Nitriles of reduction gives amine and on hydrolysis gives carboxylic acid.
Nitriles of reduction gives amine & on hydrolysis gives carboxylic acid
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10. When ethanol is mixed with ammonia and passed over alumina the compound formed is which compound?
a) C2H5NH2
b) C2H4
c) C2H5OC2H5
d) CH3OCH3
View Answer

Answer: a
Explanation: When ethanol is mixed with ammonia and passed over alumina the compound formed is amine.
When ethanol is mixed with ammonia & passed over alumina the compound formed is amine

Sanfoundry Global Education & Learning Series – Organic Chemistry.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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