2022 A-Level H2 Chemistry Paper 1 — All Solutions

The mass of one mole of each of four compounds is shown. Which row is correct?…

In the interhalogen compound BrCl, there is a single polar covalent bond. Which statement helps to explain the polarit…

Thioacetic acid and ethanoic acid both act as weak acids in solution. Which statements are correct?…

Use of the Data Booklet is relevant to this question. Entonox® gas is an equimolar mixture of \(\text{O}_2\text{(g)}\) …

Which would cause vigorous effervescence when added to aqueous sodium carbonate? 1) aluminium chloride 2) magnesium…

Arsenic and X are adjacent elements in Group 15 of the Periodic Table. X and Y are adjacent elements in the same perio…

Use of the Data Booklet is relevant to this question. 'Solder glass' is composed of 16% boron oxide, \(\text{B}_2\text{…

G, H, J and M are four elements, of which two are in Group 15 and two are in Group 16 of the Periodic Table. Two of th…

What is the order of decreasing enthalpy change for the three reactions shown?…

Use of the Data Booklet is relevant to this question. Which solid has the most exothermic lattice energy? [Assume th…

For the reaction \(\text{NH}_4\text{NO}_3\text{(s)} \rightarrow \text{N}_2\text{O(g)} + 2\text{H}_2\text{O(l)}\), \(\Del…

Hydrogen peroxide slowly decomposes at room temperature. \(2\text{H}_2\text{O}_2 \rightarrow 2\text{H}_2\text{O} + \text…

The reaction between sulfur dioxide and oxygen is reversible. \(2\text{SO}_2\text{(g)} + \text{O}_2\text{(g)} \rightleft…

A hydrogencarbonate buffer solution is used to maintain an almost constant pH in blood. The equilibrium that applies to …

An excess of silver chloride is added to water and the mixture is shaken until equilibrium is reached. How is the sol…

An excess of silver sulfate, \(\text{Ag}_2\text{SO}_4\text{(s)}\), is shaken with water. At equilibrium, the silver ion …

Which reaction steps result in the formation of a carbocation?…

The drug ibuprofen has two enantiomers. One enantiomer has the desired pharmacological activity whilst the other is inac…

Allyl alcohol, CH2=CHCH2OH, can be converted into propanal by using a catalyst containing a ruthenium complex. Which typ…

Some of the defensive odours secreted by termites have a structure similar to cembrene A, as shown. Cembrene A is trea…

The alkene 2,5-dimethylhexa-1,4-diene reacts with two moles of HBr to give X as the major product. What is the structu…

The following scheme represents the result of a hydrolysis reaction. Which statements about this reaction are correct?…

Four compounds are warmed with NaOH in aqueous ethanol and then acidified with dilute nitric acid before being shaken wi…

Which molecules rotate plane polarised light?…

Butanone reacts in a three-stage process to produce 2-methylbut-2-enoic acid, \(\text{CH}_3\text{CH=C(CH}_3\text{)COOH}\…

Ka values for two acids are given. Which statement is correct?…

What is produced when \(\text{CH}_3\text{NHCH}_2\text{CONH}_2\) is added to an excess of cold \(\text{HCl(aq)}\)?…

When treated with a catalytic quantity of \(\text{H}^+\text{(aq)}\), compound X decomposes into compounds Y and Z. Both …

Use of the Data Booklet is relevant to this question. Vanadium forms a number of coloured aqueous ions. What are the co…

The atomic radii and the first ionisation energies of the metals iron and cobalt are very similar, despite the fact that…