2018 A-Level H2 Chemistry Paper 1 — All Solutions

A beam of particles contains protons and electrons. All particles approach an electric field at the same speed. Which di…

Aluminium chloride undergoes the following temperature-dependent equilibrium. \(Al_2Cl_6(g) \rightleftharpoons 2AlCl_3(g…

The electronegativity values of carbon, selenium and chlorine are all different. Chlorine is more electronegative than b…

What is the order of decreasing enthalpy change for the three reactions shown? \(Cs^+(g) \rightarrow Cs^{2+}(g) + e^- \q…

Which statement is correct?…

Which element has the largest atomic radius?…

[Assume that at sea level one fifth of the air is oxygen and that the pressure is 1 bar.] Deep-sea divers use tanks cont…

Which equation corresponds to the enthalpy change stated?…

The standard enthalpy change of combustion of methane is \(-890 \text{ kJ mol}^{-1}\). \(CH_4(g) + 2O_2(g) \rightarrow C…

When iodine is oxidised by nitric acid, a white crystalline solid oxide can be isolated from the mixture. 0.001 mole of …

For the following reaction, the rate equation is rate \(= k[NO_2]^2\). \(CO + NO_2 \rightarrow CO_2 + NO\) What could be…

Hydrogen peroxide decomposes to form water and oxygen. The enzyme catalase catalyses this reaction in living organisms. …

Use of the Data Booklet is relevant to this question. A mordant is a soluble salt which forms an acidic aqueous solutio…

The ionic product of water, \(K_w\), is affected by temperature. Which statement describes what happens as the temperatu…

Hardness in tap water can be determined by titrating a sample of the water against a reagent which reacts with dissolved…

In this question the symbol '<' means 'less positive than' or 'more negative than'. Silver chloride dissolves in dilute …

Use of the Data Booklet is relevant to this question. Some relevant redox half-equations are given in the table. What do…

A complex of copper is formed in aqueous solution. What is a correct pairing of a possible formula for the complex with …

Transition metal ions can react in a number of different ways. Listed are four different reactions of transition metal i…

Which statements explain the difference in density of vanadium compared to calcium? \(1 \quad\) Outer shell electrons ar…

Which pair of species are carbocations?…

Each of the compounds shown contributes to the smell of strawberries. Which compound can be oxidised by Tollens' reagent…

Which molecules rotate plane polarised light?…

Rosmarinic acid occurs in herbs such as rosemary, sage and thyme. How many moles of NaOH(aq) will react with one mole of…

Chiral chloroalkanes can undergo nucleophilic substitution with NaOH(aq) to form alcohols. The reaction mechanism is eit…

The \(pK_a\) values of benzoic acid and the hydroxybenzoic acids are shown. Why is 2-hydroxybenzoic acid so much more ac…

Which reactions will give the final products indicated if an excess of the reducing agent is used?…

When ethyl ethanoate, \(CH_3C^{16}O_2C_2H_5\), undergoes acid hydrolysis in a solution containing \(H_2^{18}O\), atoms o…

Mepivacaine is a local anaesthetic. What are the products when mepivacaine is hydrolysed by heating with NaOH(aq)?…

A pentapeptide is heated under reflux with 6 mol dm\(^{-3}\) HCl. Partial hydrolysis occurs resulting in the production …