amines Flashcards
Which type of amine has three R groups attached to the nitrogen atom?
A) Primary amine
B) Secondary amine
C) Tertiary amine
D) Quarternary amine
C) Tertiary amine
Which of the following represents a primary amine?
A) R2 - NH
B) R3 - N
C) R - NH2
D) R4 - N+ X-
C) R - NH2
DNA bases are biologically significant molecules that contain which type of nitrogenous base?
A) Primary amine
B) Secondary amine
C) Tertiary amine
D) Quarternary amine
B) Secondary amine
Which of the following is NOT a biologically significant molecule containing substituted ammonia?
A) Amino acids
B) DNA bases
C) RNA bases
D) Alkaloids
D) Alkaloids
What is the general formula for a quarternary amine?
A) R2 - NH
B) R3 - N
C) R - NH2
D) R4 - N+ X-
D) R4 - N+ X-
it is Based on substituted ammonia
Amines
Which of the following statements is true regarding the boiling points of primary and secondary amines compared to alkanes and alcohols of comparable molar mass?
A) Primary and secondary amines have higher boiling points than alkanes but lower boiling points than alcohols.
B) Primary and secondary amines have lower boiling points than both alkanes and alcohols.
C) Primary and secondary amines have higher boiling points than both alkanes and alcohols.
D) Primary and secondary amines have the same boiling points as alkanes but lower boiling points than alcohols.
A) Primary and secondary amines have higher boiling points than alkanes but lower boiling points than alcohols.
Which statement correctly describes the association of amine molecules through hydrogen bonding?
A) Amines do not associate through hydrogen bonding.
B) Amines associate through hydrogen bonding, but not as strongly as alcohols.
C) Amines associate through hydrogen bonding, which is stronger than in alcohols.
D) Amines do not associate through hydrogen bonding because nitrogen is less electronegative than oxygen.
B) Amines associate through hydrogen bonding, but not as strongly as alcohols.
Which of the following best explains the difference in boiling points between methylamine (CH3NH2) and ethane (CH3CH3)?
A) Methylamine molecules are capable of forming hydrogen bonds, while ethane molecules are not.
B) Methylamine molecules have a larger molecular weight than ethane molecules.
C) Methylamine molecules have a higher degree of molecular unsaturation compared to ethane molecules.
D) Methylamine molecules have a more polarizable electron cloud compared to ethane molecules.
A) Methylamine molecules are capable of forming hydrogen bonds, while ethane molecules are not.
Can an amine molecule form hydrogen bonds with water molecules?
A) Yes, because amines can act as both hydrogen bond acceptors and donors.
B) No, because amines do not have hydrogen atoms bonded to a nitrogen atom.
C) Yes, but only if the amine is a primary or secondary amine.
D) No, because water molecules cannot form hydrogen bonds with nitrogen atoms.
A) Yes, because amines can act as both hydrogen bond acceptors and donors.
Which of the following statements is true regarding the solubility of amines in water?
A) Amines of low molar mass are insoluble in water.
B) Amines of low molar mass are highly soluble in water.
C) The solubility of amines in water increases with increasing carbon chain length.
D) The solubility of amines in water decreases with increasing carbon chain length, with the borderline of solubility at five or six carbon atoms.
D) The solubility of amines in water decreases with increasing carbon chain length, with the borderline of solubility at five or six carbon atoms.
What is the primary reason for the higher boiling points of primary amines compared to alkanes of similar molecular weight?
A) Primary amines have a higher molecular weight than alkanes.
B) Primary amines have a higher degree of molecular unsaturation than alkanes.
C) Primary amines can form hydrogen bonds with each other, while alkanes cannot.
D) Primary amines have a more polarizable electron cloud compared to alkanes.
C) Primary amines can form hydrogen bonds with each other, while alkanes cannot.
