chemistry : class12 Mixed amines : Classification of amines : Organic Compounds Containing Nitrogen MCQ Questions and Answers
Practice important
Mixed amines
MCQ questions and answers.
Page 1
of
1
|
10
MCQ Questions
1. Which of the following is a mixed secondary amine?
A.
CH3NHCH2CH3
B.
CH3NH2
C.
(CH3)2NH
D.
(CH3)3N
Correct Answer:
CH3NHCH2CH3
Explanation:
CH3NHCH2CH3 has two different alkyl groups, methyl and ethyl, attached to the nitrogen atom. Therefore, it is a mixed secondary amine.
2. A mixed amine contains which type of groups attached to the nitrogen atom?
A.
Only identical alkyl groups
B.
Different alkyl or aryl groups
C.
Only hydrogen atoms
D.
Only halogen atoms
Correct Answer:
Different alkyl or aryl groups
Explanation:
Mixed amines are amines in which the groups attached to nitrogen are different from one another, such as methyl and ethyl groups.
3. What is the common name of CH3NHCH2CH3?
A.
Dimethylamine
B.
Diethylamine
C.
Ethylmethylamine
D.
Trimethylamine
Correct Answer:
Ethylmethylamine
Explanation:
The nitrogen atom in CH3NHCH2CH3 is attached to a methyl group and an ethyl group, so it is named ethylmethylamine and is a mixed amine.
4. Which compound is a mixed tertiary amine?
A.
(CH3)3N
B.
(C2H5)3N
C.
CH3N(C2H5)2
D.
C2H5NH2
Correct Answer:
CH3N(C2H5)2
Explanation:
CH3N(C2H5)2 has three alkyl groups attached to nitrogen: one methyl and two ethyl groups. Since the groups are not all identical, it is a mixed tertiary amine.
5. Which pair of groups is attached to nitrogen in ethylmethylamine?
A.
Two methyl groups
B.
Two ethyl groups
C.
One methyl group and one ethyl group
D.
One methyl group and one phenyl group
Correct Answer:
One methyl group and one ethyl group
Explanation:
Ethylmethylamine has the structure CH3NHCH2CH3, showing one methyl group and one ethyl group attached to nitrogen.
6. Which formula represents a mixed secondary amine with one methyl and one propyl group?
A.
CH3NHCH2CH2CH3
B.
CH3NHCH3
C.
CH3CH2NHCH2CH3
D.
(CH3)3N
Correct Answer:
CH3NHCH2CH2CH3
Explanation:
CH3NHCH2CH2CH3 contains one methyl group and one propyl group attached to nitrogen, making it a mixed secondary amine.
7. Which compound is mixed because its nitrogen atom is attached to methyl, ethyl, and propyl groups?
A.
N(CH3)(C2H5)(C3H7)
B.
N(CH3)3
C.
N(C2H5)3
D.
C3H7NH2
Correct Answer:
N(CH3)(C2H5)(C3H7)
Explanation:
This compound has three different alkyl groups attached to nitrogen. Therefore, it is a mixed tertiary amine.
8. Which statement correctly describes diethylamine compared with ethylmethylamine?
A.
Both are mixed secondary amines
B.
Diethylamine is mixed, but ethylmethylamine is not
C.
Ethylmethylamine is mixed, but diethylamine is not
D.
Neither compound is a secondary amine
Correct Answer:
Ethylmethylamine is mixed, but diethylamine is not
Explanation:
Diethylamine has two identical ethyl groups, whereas ethylmethylamine has different ethyl and methyl groups. Hence, only ethylmethylamine is mixed.
9. Which of the following is not a mixed amine?
A.
CH3NHCH2CH3
B.
CH3N(C2H5)2
C.
C2H5NHCH2CH2CH3
D.
(CH3)2NH
Correct Answer:
(CH3)2NH
Explanation:
Dimethylamine has two identical methyl groups attached to nitrogen, so it is not mixed. The other compounds contain different alkyl groups.
10. A tertiary mixed amine has three alkyl groups attached to nitrogen. Which combination represents such an amine?
A.
Three methyl groups
B.
Two methyl groups and one ethyl group
C.
One hydrogen and two methyl groups
D.
Two hydrogen atoms and one ethyl group
Correct Answer:
Two methyl groups and one ethyl group
Explanation:
A tertiary amine has three carbon-containing groups attached to nitrogen. Two methyl groups and one ethyl group are not all identical, so this combination represents a mixed tertiary amine.
Short Questions and Answers
Practice short questions and answers related to
Mixed amines
.
Short questions are currently unavailable for this page.