AQA A-Level Chemistry AS Paper 1, November 2021
Every question from AQA A-Level Chemistry AS Paper 1, November 2021 (7404): 25 questions, 80 marks, each with its mark scheme and topic.
- Question 1 6 marks
State features of the current atomic model missing from Rutherford's model, and calculate the relative atomic mass of tin from mass spectrometry data.
Physical Chemistry · 3.1.1 Atomic Structure · 3.1.2 Amount of Substance
- Question 2 8 marks
Describe the reaction of magnesium with steam, the metallic bonding in magnesium, the ionic bonding and melting point of magnesium chloride, and a medical use of magnesium hydroxide.
Inorganic Chemistry · Physical Chemistry · 3.2.2 Group 2, The Alkaline Earth Metals · 3.1.3 Bonding
- Question 3 4 marks
State the meaning of an oxidising agent and deduce half-equations and the overall redox equation for the oxidation of sulfite ions by dichromate ions in acidic conditions.
Physical Chemistry · 3.1.7 Oxidation, Reduction and Redox Equations
- Question 4 7 marks
Identify cations and anions in unknown solutions A, B, and C using test-tube reactions and observations from Table 2.
Inorganic Chemistry · Required Practicals · Required Practical 4: Carry out simple test-tube reactions to identify Cations and Anions · 3.2.3 Group 7(17), The Halogens · 3.2.2 Group 2, The Alkaline Earth Metals
- Question 5 6 marks
Explain the intermolecular forces in chlorine, write equations for its reactions with water and sodium hydroxide, and state the reason chlorine is added to drinking water.
Physical Chemistry · Inorganic Chemistry · 3.1.3 Bonding · 3.2.3 Group 7(17), The Halogens
- Question 6 5 marks
Calculate the mass of sulfur dioxide formed in the reaction between calcium sulfide and calcium sulfate, and show that calcium sulfate is the limiting reagent.
Physical Chemistry · 3.1.2 Amount of Substance
- Question 7 6 marks
State the meaning of standard enthalpy of combustion, calculate the enthalpy of combustion of propan-1-ol from calorimetry data, and give a reason why the experimental value is less exothermic than expected.
Physical Chemistry · Required Practicals · 3.1.4 Energetics · Required Practical 2: Measurement of an enthalpy change
- Question 8 8 marks
Calculate the percentage by mass of sodium ethanoate in a contaminated sample of ethanoic acid using titration data, and explain the effect of rinsing the burette with deionised water.
Physical Chemistry · Required Practicals · Required Practical 1: Making up a volumetric solution · 3.1.2 Amount of Substance · 3.1.12 Acids and Bases
- Question 9 6 marks
Explain, in terms of equilibrium yield and cost, why specific conditions of temperature, pressure, and a nickel catalyst are used in the industrial preparation of hydrogen from methane and steam.
Physical Chemistry · 3.1.5 Kinetics · 3.1.6 Chemical Equilibria, Le Chatelier's Principle and Kc
- Question 10 9 marks
Calculate the equilibrium constant expression, moles of oxygen at equilibrium, and temperature using the ideal gas equation for the oxidation of sulfur dioxide.
Physical Chemistry · 3.1.2 Amount of Substance · 3.1.6 Chemical Equilibria, Le Chatelier's Principle and Kc
- Question 11 1 mark
Identify the correct equation for the electrospray ionisation of molecule X in a time of flight mass spectrometer.
Physical Chemistry · Organic Chemistry · 3.1.1 Atomic Structure · 3.3.6 Organic Analysis
- Question 12 1 mark
Identify the electron configuration of V2+ in the ground state
Physical Chemistry · 3.1.1 Atomic Structure
- Question 13 1 mark
Identify which given molecule is not able to form a co-ordinate bond with another species
Physical Chemistry · 3.1.3 Bonding
- Question 14 1 mark
Identify which species has a square planar shape among the given options.
Physical Chemistry · 3.1.3 Bonding
- Question 15 1 mark
Identify which bond has the most unsymmetrical electron distribution among the given options.
Physical Chemistry · 3.1.3 Bonding
- Question 16 1 mark
Identify which compound contains a chlorine atom with an oxidation state of +4
Physical Chemistry · 3.1.7 Oxidation, Reduction and Redox Equations
- Question 17 1 mark
Identify which of the given elements is classified as a d-block element.
Inorganic Chemistry · 3.2.1 Periodicity
- Question 18 1 mark
Identify which element in Period 3 has the highest melting point from the given multiple-choice options.
Inorganic Chemistry · 3.2.1 Periodicity
- Question 19 1 mark
Identify which pair of solutions reacts when mixed to form a dark brown solution containing iodine.
Inorganic Chemistry · 3.2.3 Group 7(17), The Halogens
- Question 20 1 mark
Identify which solid sodium halide does not produce a sulfur-containing gas when reacted with concentrated sulfuric acid.
Inorganic Chemistry · 3.2.3 Group 7(17), The Halogens
- Question 21 1 mark
Identify which atom has one more proton and two more neutrons than 31P with subscript 15.
Physical Chemistry · 3.1.1 Atomic Structure
- Question 22 1 mark
Identify the correct use of barium sulfate from the given multiple-choice options.
Inorganic Chemistry · 3.2.2 Group 2, The Alkaline Earth Metals
- Question 23 1 mark
Identify which isoelectronic ion has the largest radius among F-, Mg2+, Na+, and O2-.
Inorganic Chemistry · 3.2.1 Periodicity
- Question 24 1 mark
Identify which of the given elements has a first ionisation energy lower than that of sulfur.
Inorganic Chemistry · 3.2.1 Periodicity
- Question 25 1 mark
Identify element Z from the graph of its first seven successive ionisation energies showing a large jump after the fourth ionisation energy.
Physical Chemistry · 3.1.1 Atomic Structure