Cambridge & Pearson Edexcel Past Paper Questions

Powdered calcium carbonate reacts with dilute hydrochloric acid to produce calcium chloride, water and carbon dioxide. Which is the correct ionic e...

What is the relative molecular mass, Mr, of CuSO₄.5H₂O?

1.00 dm³ of ammonia gas is passed over heated copper(II) oxide. 3CuO(s) + 2NH₃(g) → 3Cu(s) + N₂(g) + 3H₂O(l) What is the volume of nitrogen formed ...

What are the correct anode (positive electrode) and cathode (negative electrode) products when aqueous copper(II) sulfate is electrolysed using cop...

Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Which statement about this electrolysis is correct?

The diagram shows the energy profile of a chemical reaction. Two energy changes are labelled X and Y. Which statement about the reaction is correct?

In the graph, curve 1 was obtained by observing the decomposition of 100 cm³ of 1.0 mol/dm³ hydrogen peroxide solution, catalysed by manganese(IV) ...

The equation shows a redox reaction between iron(II) chloride and chlorine gas. 2FeCl₂ + Cl₂ → 2FeCl₃ Which equation describes the reduction proces...

Which row correctly describes the oxides?

Which substance is insoluble in water?

In which of these equilibria is the forward reaction favoured by an increase in pressure?

The Contact process, the Haber process and the hydrogenation of fats all involve the use of a catalyst. Which row correctly describes whether the c...

Which element is sodium?

A non-metal element forms oxides of the type XO₂ and XO₃. What is X?

Aluminium reacts with chromium(III) oxide as shown. aluminium + chromium(III) oxide → chromium + aluminium oxide Which statements are correct? 1 Al...

Using the Periodic Table for the relative atomic masses, which has the least mass?

The diagram shows how an underwater iron pipe can be protected from rusting. Metal Z can be ..........1.......... because it is ..........2...........

Brass is an alloy. Which statement about brass is correct?

Which item is made from mild steel?

The table shows the composition of exhaust gases from an internal combustion engine. What is gas Y?

Which two gases do not damage limestone buildings?

Iron(III) oxide can be reduced to iron by carbon. Which other element can reduce iron(III) oxide to iron?

An ammonium salt was added to excess hot aqueous sodium hydroxide. Ammonia gas was evolved. When no more ammonia was evolved, aluminium was added t...

Two esters have the same molecular formula, C₃H₆O₂. What are the names of these two esters? 1 methyl ethanoate 2 ethyl propanoate 3 ethyl methanoat...

Which statement is correct?

When cracked, one mole of a compound, X, produces one mole of propene and one mole of hydrogen. X → C₃H₆ + H₂ What type of compound is X?

Which is a correct definition of isomers?

Which of the following has not been prepared by reacting a carboxylic acid with an alcohol?

Which of these polymers is a protein?

In the addition polymer poly(propene), what is the simplest ratio of carbon atoms to hydrogen atoms?

Which statement about vegetable oil and the margarine made from it is correct?

The concentration of aqueous sodium carbonate can be found by reaction with hydrochloric acid of known concentration using the indicator methyl ora...

Which molecules all contain one or more double covalent bonds?

The metals Cr, Co, Fe and Mn are all transition elements. Which particles have the same number of electrons?

Which substance has metallic bonding?

The table shows the results of two reactions of an aqueous solution of a salt. reagents: excess aqueous sodium hydroxide, final observation: white ...

Which row shows correct statements about the speed at which a gas diffuses?

Using the Periodic Table for the relative atomic masses, which has the greatest mass?

Ammonia is manufactured from nitrogen and hydrogen by the Haber process. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) What is the percentage yield when 60 kg of ammoni...

The list shows some substances that conduct electricity. 1 aqueous sodium chloride 2 copper 3 graphite In which substance(s) are only electrons inv...

Caesium is a Group I metal. Which reaction involving this element would not produce hydrogen?

The energy diagram represents a chemical reaction carried out both with a catalyst and without a catalyst. What is the enthalpy change for the cata...

Hydrogen reacts with iodine to form hydrogen iodide. This is a slow reaction. H₂(g) + I₂(g) ⇌ 2HI(g) 1 mole of hydrogen gas and 1 mole of iodine va...

Acidified potassium manganate(VII) is used as a test reagent. When it is added to an aqueous solution of compound X, the colour of the test reagent...

You are supplied with dilute hydrochloric acid together with • copper solid, • magnesium solid, • aqueous lead nitrate, • aqueous silver nitrate. H...

In the graph, curve 1 was obtained by observing the decomposition of 100cm³ of 1.0mol/dm³ hydrogen peroxide solution, catalysed by manganese(IV) ox...

A colourless solution reacts with magnesium to form a salt and hydrogen gas. How is this solution acting?

Which compound produces the greatest number of ions when 1 mole is dissolved in water?

The equation for the reaction taking place during the production of ammonia is shown. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔH = –92 kJ/mol The reaction is carr...

From their position in the Periodic Table, what would you expect the elements titanium, vanadium, chromium and cobalt to have in common? 1 variable...