AQA A-Level Chemistry AS Paper 1, June 2023
Every question from AQA A-Level Chemistry AS Paper 1, June 2023 (7404): 23 questions, 78 marks, each with its mark scheme and topic.
- Question 1 5 marks
Identify Period 3 elements and write electron configurations and equations related to successive ionisation energies.
Physical Chemistry · Inorganic Chemistry · 3.1.1 Atomic Structure · 3.2.1 Periodicity
- Question 2 19 marks
Answer questions on Group 2 elements including metallic bonding in magnesium, trends in atomic radius, reaction with steam, sulfate solubility, isotopic abundance of strontium, and a back titration of magnesium hydroxide.
Inorganic Chemistry · Physical Chemistry · 3.2.2 Group 2, The Alkaline Earth Metals · 3.1.1 Atomic Structure · 3.1.2 Amount of Substance · 3.1.3 Bonding
- Question 3 4 marks
Suggest three improvements to a given method for preparing a standard solution, and calculate the percentage uncertainty in the volume of a 250 cm³ volumetric flask.
Physical Chemistry · Required Practicals · 3.1.2 Amount of Substance · Required Practical 1: Making up a volumetric solution
- Question 4 5 marks
Determine the relative formula mass of a Group 2 nitrate and identify metal M using the ideal gas equation and stoichiometry from its thermal decomposition.
Physical Chemistry · Inorganic Chemistry · 3.1.2 Amount of Substance · 3.2.2 Group 2, The Alkaline Earth Metals
- Question 5 6 marks
Discuss the difference between the shapes and bond angles of CF4 and XeF4.
Physical Chemistry · 3.1.3 Bonding
- Question 6 7 marks
Explain the trend in halogen electronegativity, compare reactions of sodium chloride and sodium bromide with concentrated sulfuric acid, and write half-equations and the overall equation for the reaction of sodium iodide with concentrated sulfuric acid.
Inorganic Chemistry · Physical Chemistry · 3.2.3 Group 7(17), The Halogens · 3.1.3 Bonding · 3.1.7 Oxidation, Reduction and Redox Equations · 3.1.2 Amount of Substance
- Question 7 10 marks
Calculate the molar mass of compound X using TOF mass spectrometry data, and explain the principles of ionisation and detection.
Physical Chemistry · 3.1.1 Atomic Structure · 3.1.2 Amount of Substance
- Question 8 9 marks
Calculate equilibrium amounts, write the expression for Kc, explain the effect of temperature on Kc, and calculate the equilibrium concentration of a reactant.
Physical Chemistry · 3.1.6 Chemical Equilibria, Le Chatelier's Principle and Kc
- Question 9 1 mark
Identify which atom contains the greatest number of neutrons from a given list of isotopes.
Physical Chemistry · 3.1.1 Atomic Structure
- Question 10
- Question 11 1 mark
Identify which suggestion decreases the percentage uncertainty in the mean titre during an acid-base titration.
Physical Chemistry · Required Practicals · 3.1.2 Amount of Substance · Required Practical 1: Making up a volumetric solution
- Question 12 1 mark
Identify which reaction has the highest percentage atom economy for the production of hydrogen.
Physical Chemistry · 3.1.2 Amount of Substance
- Question 13 1 mark
Identify which molecule among NCl3, CCl4, PF5, and SF6 possesses a permanent dipole.
Physical Chemistry · 3.1.3 Bonding
- Question 14 1 mark
Identify which molecule can accept an electron pair during the formation of a coordinate bond.
Physical Chemistry · 3.1.3 Bonding
- Question 15 1 mark
Identify which reaction equation represents the standard enthalpy of formation of potassium oxide.
Physical Chemistry · 3.1.4 Energetics
- Question 16 1 mark
Identify which chemical species contains chlorine in its highest oxidation state.
Physical Chemistry · Inorganic Chemistry · 3.1.7 Oxidation, Reduction and Redox Equations · 3.2.3 Group 7(17), The Halogens
- Question 17
- Question 18 1 mark
Identify which incomplete half-equation is balanced by adding two H+ ions and one electron to the left-hand side.
Physical Chemistry · Inorganic Chemistry · 3.1.7 Oxidation, Reduction and Redox Equations · 3.2.5 Transition Metals
- Question 19 1 mark
Identify which unknown solution contains carbonate ions based on test-tube observations.
Inorganic Chemistry · Required Practicals · Required Practical 4: Carry out simple test-tube reactions to identify Cations and Anions · 3.2.6 Reactions of Ions in Aqueous Solution
- Question 20 1 mark
Identify the compound in solution P from a set of Group 2 halides.
Inorganic Chemistry · Required Practicals · 3.2.2 Group 2, The Alkaline Earth Metals · 3.2.3 Group 7(17), The Halogens · Required Practical 4: Carry out simple test-tube reactions to identify Cations and Anions
- Question 21 1 mark
Identify the expected observation for solution S in Test 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
- Question 22 1 mark
Identify which substance is present in the filtrate after filtering the reaction mixture formed in Test 2.
Inorganic Chemistry · Required Practicals · 3.2.2 Group 2, The Alkaline Earth Metals · 3.2.3 Group 7(17), The Halogens · Required Practical 4: Carry out simple test-tube reactions to identify Cations and Anions
- Question 23 1 mark
Identify the compound present in solution T from the given options involving magnesium or barium halides.
Inorganic Chemistry · Required Practicals · 3.2.2 Group 2, The Alkaline Earth Metals · 3.2.3 Group 7(17), The Halogens · Required Practical 4: Carry out simple test-tube reactions to identify Cations and Anions