Lesson 18B.3
18B.3 Polyamides and amino acids Quiz: Pearson Edexcel Chemistry, Unit 18
20 questions
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Lesson 18B.3, Polyamides and amino acids: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 18: Organic Chemistry III, written with Revision Ninja.
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The 20 questions
-
What type of polymerisation forms a polyamide from a dicarboxylic acid and a diamine?
- Addition polymerisation
- Cationic polymerisation
- Condensation polymerisation
- Free radical polymerisation
-
What is the repeat unit of nylon-6,6?
- -[NH(CH2)6NH-CO(CH2)4CO]-
- -[CO(CH2)6CO]-
- -[NH(CH2)6CO]-
- -[NH(CH2)4NH(CH2)4CO]-
-
Which two monomers are used to synthesise nylon-6,6?
- Hexanedioic acid, hexylamine
- Pentanedioic acid, pentane-1,5-diamine
- Hexanoic acid, hexane-1,6-diamine
- Hexanedioic acid, hexane-1,6-diamine
-
What term describes an amino acid ion containing both a positive and a negative charge?
- Cation
- Zwitterion
- Carbocation
- Anion
-
Which functional groups are present in 2-aminopropanoic acid?
- Amide and carboxyl
- Amide and alcohol
- Amine and ester
- Amine and carboxyl
-
Which bond links amino acid residues together in a protein?
- Peptide bond
- Glycosidic bond
- Ionic bond
- Ester bond
-
Calculate the relative molecular mass of the repeat unit of nylon-6,6, C12H22N2O2, using Ar: C 12, H 1, N 14, O 16.
- 228
- 226
- 114
- 198
-
Calculate the relative molecular mass of alanine, C3H7NO2, using Ar: C 12, H 1, N 14, O 16.
- 73
- 87
- 91
- 89
-
Which of these is a diamine?
- Hexanedioic acid
- Hexane-1,6-diamine
- Hexane-1,6-diol
- Hexanal
-
A dipeptide forms from glycine and alanine. How many water molecules are eliminated?
- 2
- 3
- 1
- 0
-
At the isoelectric point, what is the net charge of an amino acid?
- Plus one
- Plus two
- Minus one
- Zero
-
Which analytical technique is commonly used to separate amino acids in a mixture?
- Infrared spectroscopy
- Mass spectrometry
- Recrystallisation
- Thin-layer chromatography
-
Water is eliminated when a polyamide forms from acid and amine groups. If HCl rather than water is lost from an acyl chloride and amine, what is the mass of HCl per mole of amide link?
- 44.0 g
- 17.0 g
- 36.5 g
- 18.0 g
-
Which polymer contains amide links in its backbone?
- Poly(propene)
- Nylon-6,6
- Poly(ethylene terephthalate)
- Poly(ethene)
-
How many peptide links are present in a tripeptide?
- 3
- 4
- 1
- 2
-
Why do amino acids have unexpectedly high melting temperatures?
- Covalent macromolecular network
- Strong zwitterionic attractions
- Strong hydrogen bonding
- High molecular mass
-
Which species predominates in an amino acid solution at a pH below its isoelectric point?
- Cation
- Anion
- Neutral molecule
- Zwitterion
-
Why is glycine the only naturally occurring amino acid that is not optically active?
- Lacks chiral carbon
- Forms no zwitterion
- Lacks carboxyl group
- Contains two amines
-
Which intermolecular force gives nylon-6,6 its high tensile strength?
- London dispersion forces
- Dipole-dipole forces
- Ionic bonding
- Hydrogen bonding
-
Which small molecule is eliminated when a dicarboxylic acid and a diamine react to form a polyamide?
- Carbon dioxide
- Water
- Ammonia
- Hydrogen chloride
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