Organic Chemistry Questions and Answers – Preparation of Amines – 2

This set of Organic Chemistry online test focuses on “Preparation of Amines – 2”.

1. Which of the following reaction does not form amines?
a) RX + NH3
b)
The following reaction does not form amines RCN + H2O H+−
c) RCN + H2O \(^{\underrightarrow{H^+}}\)
d) RCONH2 + 4H \(^{\underrightarrow{LiAlH_4}}\)
View Answer

Answer: c
Explanation: Nitrile gives carboxylic acid on hydrolysis and amines on reduction.
Nitrile gives carboxylic acid on hydrolysis & amines on reduction

2. Starting from propanoic acid, the following reactions were carried out, what is the compound Z?
The compound Z is CH3−CH2−NH2 starting from propanoic acid
a) CH3−CH2−Br
b) CH3−CH2−NH2
c) CH3-CH2-COBr
d) CH3−CH2−CH2−NH2
View Answer

Answer: b
Explanation: Starting from propanoic acid, the following reactions were carried out, the compound is ethylamine.
Starting from propanoic acid following reactions were carried out in compound ethylamine

3. In the given equation, what is the final product C?
The final product C is Amino methane in given equation
a) Ammonium acetate
b) Acetamide
c) Amino methane
d) Ethanal
View Answer

Answer: c
Explanation: Carboxylic acid with PCl5 forms acid chloride and acid chloride reacts with NH3 to give amide which on reduction gives amine.
Carboxylic acid with PCl5 forms acid chloride & acid chloride reacts with NH3 give amide
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4. Which of the following reactions will not give primary amine?
a) CH3CONH2 + KOH.Br2
b) CH3CN + LiAlH4
c) CH3NC + LiAlH4
d) CH3CONH2 + LiAlH4
View Answer

Answer: c
Explanation: Nitrile on reduction gives secondary amine.
The following reactions will not give primary amine is CH3NC + LiAlH4

5. Gabriel’s phthalimide synthesis is used for the preparation of which amine?
a) Primary aromatic amine
b) Secondary amine
c) Primary aliphatic amine
d) Tertiary amine
View Answer

Answer: c
Explanation: Gabriel phthalimide synthesis is preferred for synthesising primary amines. Phthalimide is alkylated with alkyl or benzyl halide and then hydrolysed or hydrazinolysis to get pure primary amine.
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6. What will be the product of the following reaction?
The product of the following reaction is Propanamine
a) Propanamine
b) N-methylpropaneamine
c) N, N-dimethylpropanemamine
d) Ethyl amine
View Answer

Answer: a
Explanation: Amides yield primary amines on reduction by lithium aluminium hydride.
Amides yield primary amines on reduction by lithium aluminium hydride

7. What will be the product of the following reaction?
The product of the following reaction is N-methylpropaneamine
a) Propanamine
b) N-methylpropaneamine
c) N, N-dimethylpropanemamine
d) Ethyl amine
View Answer

Answer: b
Explanation: N‐substituted Amides on reduction by lithium aluminum hydride yield secondary amines.
N‐substituted Amides on reduction by lithium aluminum hydride yield secondary amines
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8. What will be the product of the following reaction?
The product of the following reaction is N-methylpropanamine
a) Propanamine
b) N-methylpropanamine
c) N, N-dimethylpropanmamine
d) Ethyl amine
View Answer

Answer: b
Explanation: N, N‐disubstituted Amides on reduction by lithium aluminum hydride yield tertiary amines.
N, N‐disubstituted Amides on reduction by lithium aluminum hydride yield tertiary amines

9. Which type of amine is produced by reaction of ketones with primary amines, followed by reduction?
a) Secondary Aromatic amine
b) N-substituted amine
c) N, N-disubstituted amine
d) Primary aromatic amine
View Answer

Answer: b
Explanation: N‐substituted amines are produced by reaction of ketones with primary amines, followed by reduction.
N‐substituted amines are produced by reaction of ketones with primary amines
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10. Which type of amine is produced by reaction of ketones with secondary amines, followed by reduction?
a) Secondary Aromatic amine
b) N-substituted amine
c) N, N-disubstituted amine
d) Primary aromatic amine
View Answer

Answer: c
Explanation: N, N‐disubstituted amines can be produced by reaction of 2° amines with ketones followed by reduction.
N, N‐disubstituted amines produced by reaction of 2° amines with ketones followed

Sanfoundry Global Education & Learning Series – Organic Chemistry.

To practice all areas of Organic Chemistry for online tests, here is complete set of 1000+ Multiple Choice Questions and Answers.

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