2021 A-Level H2 Chemistry Paper 1 — All Solutions

In two separate experiments a beam of protons and a beam of electrons, travelling at the same velocity, pass through an …

Use of the Data Booklet is relevant to this question. An element Q forms an ionic nitrate with formula \(\text{QNO}_3\)…

The ionisation energies, in kJ mol\(^{-1}\), of five elements are given in the table. Which statement about these ionis…

The 7th, 8th, 9th and 10th ionisation energies of four consecutive elements in the Periodic Table, W, X, Y and Z, are sh…

What is the trend in bond energy and in bond length of the carbon to carbon bond from \(\text{C}_2\text{H}_6\) to \(\tex…

The table identifies the shape and polarity of four molecules. Which row is correct?…

The table shows the structural formulae and relative molecular masses, Mr, of four compounds. What is the correct orde…

Which description of Dalton's Law is correct?…

A student carries out an investigation using silicon dioxide. All experiments are carried out at room temperature. Whi…

Use of the Data Booklet is relevant to this question. Which contains the greatest number of molecules?…

Use of the Data Booklet is relevant to this question. A student mixes 20.0 cm\(^3\) of 5.00 mol dm\(^{-3}\) sulfuric ac…

An equilibrium is set up, in a vessel at constant temperature and atmospheric pressure, according to the following react…

In reaction 1, hydrogen reacts with gaseous bromine to form hydrogen bromide. \(\text{H}_2\text{(g)} + \text{Br}_2\text…

Compound Z is used in perfumes to give a fragrance of sandalwood or musk. It can be reduced by hydrogen gas with a nicke…

Use of the Data Booklet is relevant to this question. The reaction of methylpropane with a halogen, \(\text{X}_2\), pro…

Which statement about propene explains how it reacts with bromine?…

Methylbenzene reacts with bromine chloride, BrCl, in different ways, depending on the conditions used. A reaction is c…

2-bromopropane undergoes nucleophilic substitution at a faster rate than 2-chloropropane under the same conditions. Wh…

An unknown organic compound is tested with warm silver nitrate solution. No visible result is seen after one hour. Two s…

DOTP is used as a plasticiser to increase the fluidity of plastics such as PVC.…

Amines react with acids in the gas phase to form salts. \(\text{R}_3\text{N(g)} + \text{HX(g)} \rightleftharpoons \text…

The structure of N-methylethanamide is shown. Which statements can be used to explain why an aqueous solution of N-met…

Compound X reacts with \(\text{LiAlH}_4\) to form a compound with molecular formula \(\text{C}_6\text{H}_{13}\text{N}\).…

The amino acid glycine exists as different ionic species depending on pH. \(\text{H}_3\text{N}^+-\text{CH}_2-\text{CO}_…

The ore iron(II) chromite, \(\text{FeCr}_2\text{O}_4\), is mined in the Philippines and Afghanistan. The first stage in…

When a standard copper electrode is joined to a standard hydrogen electrode, the \(E_\text{cell}^\circ = +0.34\) V. Whi…

Use of the Data Booklet is relevant to this question. In the electrolysis of molten aluminium oxide, 0.27 g of alumini…

Use of the Data Booklet is relevant to this question. An electrolysis cell is set up with an anode made of an alloy of …

Use of the Data Booklet is relevant to this question. An excess of zinc powder is stirred into an acidified solution co…

Rhenium is a transition element. Two properties of rhenium are given. 1 The melting point of rhenium is 3180 °C. 2 …