1. What are diamines?
A.
Amines containing one amino group
B.
Amines containing two amino groups
C.
Amines containing three amino groups
D.
Amines containing no amino group
Correct Answer:
Amines containing two amino groups
Explanation:
Diamines are compounds that contain two amino groups, represented as -NH2, in the same molecule.
2. Which of the following is the simplest diamine?
A.
Methylamine
B.
Ethylamine
C.
Ethylenediamine
D.
Aniline
Correct Answer:
Ethylenediamine
Explanation:
Ethylenediamine, H2N-CH2-CH2-NH2, is the simplest commonly studied diamine and contains two amino groups.
3. How many amino groups are present in ethylenediamine?
A.
One
B.
Two
C.
Three
D.
Four
Correct Answer:
Two
Explanation:
Ethylenediamine has the structure H2N-CH2-CH2-NH2, showing two -NH2 groups.
4. What is the molecular formula of ethylenediamine?
A.
CH3NH2
B.
C2H5NH2
C.
C2H8N2
D.
C6H5NH2
Correct Answer:
C2H8N2
Explanation:
Ethylenediamine has the structure H2N-CH2-CH2-NH2, giving the molecular formula C2H8N2.
5. Which structure represents a diamine?
A.
CH3NH2
B.
C2H5NH2
C.
H2N-CH2-CH2-NH2
D.
C6H5NH2
Correct Answer:
H2N-CH2-CH2-NH2
Explanation:
The structure H2N-CH2-CH2-NH2 contains two amino groups and is therefore a diamine.
6. A compound with two -NH2 groups attached to carbon atoms is classified as a:
A.
Monoamine
B.
Diamine
C.
Triamine
D.
Amide
Correct Answer:
Diamine
Explanation:
A compound containing two amino groups is classified as a diamine.
7. What is the common name of H2N-CH2-CH2-NH2?
A.
Ethylenediamine
B.
Methylamine
C.
Trimethylamine
D.
Aniline
Correct Answer:
Ethylenediamine
Explanation:
The compound H2N-CH2-CH2-NH2 is commonly called ethylenediamine because two amino groups are attached to an ethylene chain.
8. Which formula represents a compound with two nitrogen atoms in two amino groups?
A.
CH3NH2
B.
C2H5NH2
C.
H2N-CH2-CH2-NH2
D.
C6H5NH2
Correct Answer:
H2N-CH2-CH2-NH2
Explanation:
This formula contains two separate -NH2 groups, so it represents a diamine.
9. A diamine differs from a monoamine because a diamine contains:
A.
Two carbon atoms only
B.
Two amino groups
C.
Two oxygen atoms
D.
Two benzene rings
Correct Answer:
Two amino groups
Explanation:
The defining feature of a diamine is the presence of two amino groups, whereas a monoamine contains only one.
10. Which of the following compounds is not a diamine?
A.
Ethylenediamine
B.
H2N-CH2-CH2-NH2
C.
A compound containing two -NH2 groups
D.
CH3NH2
Correct Answer:
CH3NH2
Explanation:
CH3NH2 contains only one amino group, so it is a monoamine rather than a diamine.
Short questions are currently unavailable for this page.