2023 A-Level H2 Chemistry Paper 1 — All Solutions

Use of the Data Booklet is relevant to this question. Neodymium, Nd, and promethium, Pm, are both lanthanoids. An isoto…

The electronegativity values of three unidentified elements X, Y and Z are X = 1.2, Y = 0.9 and Z = 1.8. The electro…

The table shows the boiling points of two organic compounds. Which statement explains the relative boiling points of \(…

Which species contain a total of eight shared electrons? 1) ammonium ion 2) carbon dioxide 3) methanal…

How many of the molecules listed are polar? • 1,1-difluoroethene • cis-1,2-difluoroethene • trans-1,2-difluoroeth…

Use of the Data Booklet is relevant to this question. P is the number of Period 3 elements which have only one orbital…

Which statements about the behaviour of the Group 2 elements from magnesium to barium are correct? 1) The elements bec…

A sample of silicon contains three naturally occurring isotopes, \(^{28}\text{Si}\), \(^{29}\text{Si}\) and \(^{30}\text…

50.0 cm\(^3\) of 2.00 mol dm\(^{-3}\) \(\text{H}_2\text{SO}_4\) is added to 100 cm\(^3\) of 1.00 mol dm\(^{-3}\) NaOH in…

Calcium(I) chloride, CaCl, does not exist as a stable compound but its lattice energy can be estimated. What is the pre…

The rate of an enzyme-catalysed reaction changes as substrate concentration changes. Which row correctly describes ho…

The statements refer to the value of the equilibrium constant, \(K_p\), for a gas phase reaction. Which statement is co…

The gaseous reaction between nitrogen and hydrogen is carried out. At equilibrium the temperature is 400 K and the total…

Use of the Data Booklet is relevant to this question. 30.0 cm\(^3\) of 0.500 mol dm\(^{-3}\) \(\text{Br}_2\text{(aq)}\)…

Two students are each given equal volumes of 0.1 mol dm\(^{-3}\) silver nitrate, sodium ethanoate and potassium bromide.…

Propane, benzene and ethyne contain carbon atoms with hybrid orbitals. What is the total number of the 2p orbitals hyb…

Chloroethene, \(\text{CH}_2=\text{CHCl}\), is unreactive to nucleophiles whereas 3-chloropropene, \(\text{CH}_2=\text{CH…

How many constitutional isomers are there with the formula \(\text{C}_5\text{H}_{10}\) that do not contain carbon atoms …

Use of the Data Booklet is relevant to this question. Two reaction sequences with benzene as the starting material are…

Which statement about benzene and its properties is correct?…

The hydrolysis of 3-bromo-3-methylhexane produces a mixture of two isomeric alcohols. Which statement correctly descri…

1-chloropropane, propanoyl chloride and chlorobenzene hydrolyse in water at different rates. Which statement is correc…

10 cm\(^3\) of a gaseous hydrocarbon, X, burns completely with exactly 75 cm\(^3\) of oxygen to produce 50 cm\(^3\) of c…

In an industrial process, heptane vapour is passed over a heated catalyst to make methylbenzene.…

Ethanoyl chloride, CH3COCl, reacts with 4-methylphenol. What is the structure of the organic product?…

3-bromo-4-hydroxycinnamic acid is dissolved in heavy water, \(\text{D}_2\text{O}\). It contains a number of hydrogen ato…

A tripeptide is a molecule made from three amino acids which have reacted together in a condensation reaction. Which s…

Which statements about an \(\text{H}_2\) / \(\text{O}_2\) fuel cell are correct? 1) The reactions in the cell produce…

Which statements about the standard hydrogen electrode are correct? 1) When a standard hydrogen electrode is connecte…

A current of 0.65 A is passed through 250 cm\(^3\) of 0.200 mol dm\(^{-3}\) copper(II) sulfate. The anode and cathode of…