Practice Paper: Edexcel AS Chemistry
8CH0/02 (Paper 2)
Organic and physical chemistry (core content)
Question paper
Written by AcePapers
Independent practice paper written for revision. Not an official Pearson paper and
not affiliated with or endorsed by Pearson.
Time allowed: 1 hour 30 minutes Total: 80 marks
You will need
• A scientific calculator and a ruler. A data sheet is printed after this page and a
periodic table is printed at the end of the paper.
Instructions
• Answer every question. Write your answers in the spaces provided.
• For multiple-choice questions, mark one box with a cross (☒). If you change your
mind, put a line through that box and cross your new answer.
• Show your working in calculations and give units where appropriate.
• In questions marked with an asterisk (*), marks are also given for a clear,
logically ordered answer in which points are linked together.
• The number of marks for each question or part is shown in brackets. Use it to
judge how much to write.
Name: ______________________________________ Date: ________________
Practice Paper 8CH0/02 (Paper 2) – Question paper Written by AcePapers | Page 1
, Data sheet
Standard values taken from public sources and rounded for use in this practice paper.
Quantity Value
L, the Avogadro constant 6.02 × 1023 mol−1
Molar volume of any gas at r.t.p. (298 K, 101
24.0 dm3 mol−1
kPa)
Gas constant, R 8.31 J mol−1 K−1
Specific heat capacity of water (and dilute
4.18 J g−1 K−1
aqueous solutions)
Water: density 1.00 g cm−3
1 dm3 = 1000 cm3 = 1.00 × 10−3 m3; 0 °C
Unit conversions
= 273 K; 1 kPa = 1000 Pa
Mean bond enthalpies (kJ mol−1)
C=O
Bond H–H C–H C–C C=C C–O O–H O=O (in
CO2)
Enthalpy 436 413 347 612 358 464 498 805
Bond N–H N≡N Cl–Cl Br–Br C–Cl C–Br C–I H–Cl
Enthalpy 391 945 243 193 346 290 228 432
Infrared absorption ranges
Bond and compound type Wavenumber / cm−1
O–H in alcohols (hydrogen bonded) 3200–3550 (broad)
O–H in carboxylic acids 2500–3300 (very broad)
C–H in alkanes and alkenes 2850–3100
C=O in aldehydes, ketones, acids, esters 1680–1750
C=C in alkenes 1620–1680
C–O in alcohols, acids, esters 1000–1300
Practice Paper 8CH0/02 (Paper 2) – Question paper Written by AcePapers | Page 2
, 1 Alkanes are obtained from crude oil and are used as fuels and as feedstock for the
chemical industry.
(a)(i) What is the name of the alkane CH CH(CH )CH(CH )CH CH ?
3 3 3 2 3
☐ A 3,4-dimethylpentane
☐ B 2,3-dimethylpentane
☐ C 2-ethyl-3-methylbutane
☐ D 2,3-dimethylhexane
(1)
(ii) Decane, C10H22, can be cracked to form octane and one other product only.
Write the equation for this reaction.
(1)
(iii) Explain why oil refineries crack long-chain alkanes.
(2)
(b)(i) In a poorly ventilated engine, heptane, C H , can burn to form carbon
7 16
monoxide and water only. Write the equation for this reaction.
(1)
(ii) Explain why carbon monoxide is toxic.
(1)
(c) Methane reacts with chlorine to form chloromethane, CH3Cl, by free-radical
substitution.
(i) State the condition needed to start the reaction.
(1)
(ii) Write the two propagation steps that produce chloromethane.
(2)
Practice Paper 8CH0/02 (Paper 2) – Question paper Written by AcePapers | Page 3
8CH0/02 (Paper 2)
Organic and physical chemistry (core content)
Question paper
Written by AcePapers
Independent practice paper written for revision. Not an official Pearson paper and
not affiliated with or endorsed by Pearson.
Time allowed: 1 hour 30 minutes Total: 80 marks
You will need
• A scientific calculator and a ruler. A data sheet is printed after this page and a
periodic table is printed at the end of the paper.
Instructions
• Answer every question. Write your answers in the spaces provided.
• For multiple-choice questions, mark one box with a cross (☒). If you change your
mind, put a line through that box and cross your new answer.
• Show your working in calculations and give units where appropriate.
• In questions marked with an asterisk (*), marks are also given for a clear,
logically ordered answer in which points are linked together.
• The number of marks for each question or part is shown in brackets. Use it to
judge how much to write.
Name: ______________________________________ Date: ________________
Practice Paper 8CH0/02 (Paper 2) – Question paper Written by AcePapers | Page 1
, Data sheet
Standard values taken from public sources and rounded for use in this practice paper.
Quantity Value
L, the Avogadro constant 6.02 × 1023 mol−1
Molar volume of any gas at r.t.p. (298 K, 101
24.0 dm3 mol−1
kPa)
Gas constant, R 8.31 J mol−1 K−1
Specific heat capacity of water (and dilute
4.18 J g−1 K−1
aqueous solutions)
Water: density 1.00 g cm−3
1 dm3 = 1000 cm3 = 1.00 × 10−3 m3; 0 °C
Unit conversions
= 273 K; 1 kPa = 1000 Pa
Mean bond enthalpies (kJ mol−1)
C=O
Bond H–H C–H C–C C=C C–O O–H O=O (in
CO2)
Enthalpy 436 413 347 612 358 464 498 805
Bond N–H N≡N Cl–Cl Br–Br C–Cl C–Br C–I H–Cl
Enthalpy 391 945 243 193 346 290 228 432
Infrared absorption ranges
Bond and compound type Wavenumber / cm−1
O–H in alcohols (hydrogen bonded) 3200–3550 (broad)
O–H in carboxylic acids 2500–3300 (very broad)
C–H in alkanes and alkenes 2850–3100
C=O in aldehydes, ketones, acids, esters 1680–1750
C=C in alkenes 1620–1680
C–O in alcohols, acids, esters 1000–1300
Practice Paper 8CH0/02 (Paper 2) – Question paper Written by AcePapers | Page 2
, 1 Alkanes are obtained from crude oil and are used as fuels and as feedstock for the
chemical industry.
(a)(i) What is the name of the alkane CH CH(CH )CH(CH )CH CH ?
3 3 3 2 3
☐ A 3,4-dimethylpentane
☐ B 2,3-dimethylpentane
☐ C 2-ethyl-3-methylbutane
☐ D 2,3-dimethylhexane
(1)
(ii) Decane, C10H22, can be cracked to form octane and one other product only.
Write the equation for this reaction.
(1)
(iii) Explain why oil refineries crack long-chain alkanes.
(2)
(b)(i) In a poorly ventilated engine, heptane, C H , can burn to form carbon
7 16
monoxide and water only. Write the equation for this reaction.
(1)
(ii) Explain why carbon monoxide is toxic.
(1)
(c) Methane reacts with chlorine to form chloromethane, CH3Cl, by free-radical
substitution.
(i) State the condition needed to start the reaction.
(1)
(ii) Write the two propagation steps that produce chloromethane.
(2)
Practice Paper 8CH0/02 (Paper 2) – Question paper Written by AcePapers | Page 3
