Cambridge & Pearson Edexcel Past Paper Questions

This question is about elements in Group V of the Periodic Table. (a) The table shows some properties of the Group V elements. [Table 10.1] Use the...

Which row shows the most appropriate apparatus for the measurement given?

A liquid, X, is distilled from a mixture using the apparatus shown. During the distillation, the thermometer reads from 157 °C to 160 °C. Which inf...

An aqueous solution contains a salt, Y. Addition of an aqueous solution X results in a precipitate being formed that redissolves when more X is add...

Which gas diffuses the fastest at the same pressure?

The diagram shows the outer shell electrons of the atoms of two elements, Q and R. The sulfate of Q is insoluble. Element R is gaseous at room temp...

Which statement about iodine atoms and iodide ions is correct?

The element chlorine has two isotopes, ³⁵₁₇Cl and ³⁷₁₇Cl. In the Periodic Table, chlorine is shown as ³⁵·⁵₁₇Cl. Which row shows the correct percent...

What is the nucleon number of the isotope of uranium, ²³⁵₉₂U?

Silicon dioxide has a giant structure. Each silicon atom is joined to four oxygen atoms by covalent bonds. Part of the structure is shown. Which pr...

Elements X and Y react to form compound XY. Element Y has more electrons in its outer shell than element X. Compound XY conducts electricity in the...

Which compound has the most single bonds in one molecule?

The formula of ammonium metavanadate is NH4VO3. It consists of NH4 ions and VO3 ions. What are the charges on these ions?

Which mass of oxygen gas combines with exactly 16g of sulfur to form sulfur dioxide, SO2?

The atomic number of ruthenium is 44. One of the oxides of ruthenium is a black solid, X. 5.79 g of X contains 1.39 g of oxygen. What is the empiri...

250 cm³ of 1.0 mol/dm³ hydrochloric acid reacts with an excess of solid sodium carbonate. The equation is shown. 2HCl(aq) + Na2CO3(s) → 2NaCl(aq) +...

When excess aqueous barium chloride is added to 25.0 cm³ of 1.00 mol/dm³ sodium sulfate, a white precipitate of barium sulfate is formed. Na2SO4(aq...

Aqueous copper(II) sulfate is electrolysed using inert electrodes. Which statement is correct?

Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Which equation shows the reaction that occurs at the anode?

Which pair of equations correctly represents the reactions taking place at the anode and at the cathode during the electrolysis of molten silver br...

Which two processes are both endothermic?

A sample of sulfuric acid is added to 10g of zinc granules. A reaction occurs and a gas is produced. The rate of the reaction is increased if a sma...

The rate of reaction between magnesium and dilute hydrochloric acid is investigated. The equation is shown. Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) A ...

Thiosulfate ions, S2O3²⁻, react with iodine, I2, in aqueous solution. 2S2O3²⁻(aq) + I2(aq) → 2I⁻(aq) + S4O6²⁻(aq) In this reaction, the S2O3²⁻ ions...

The equation shows a reaction in the Contact process. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = –196 kJ/mol Which change would move the position of equilibriu...

Some medicines contain the magnesium salt of a fatty acid. The fatty acids are members of the homologous series of carboxylic acids and contain one...

Sodium sulfate, Na2SO4, and sodium hydrogensulfate, NaHSO4, can both be prepared using aqueous sodium hydroxide and sulfuric acid. 2NaOH(aq) + H2SO...

Which substance reacts with dilute sulfuric acid in the preparation of a pure sample of lead(II) sulfate?

Two statements are given. statement 1 Going down Group I and Group VII, the melting point of the elements increases. statement 2 Chlorine can displ...

A reversible reaction involves a solid reacting with hydrogen. Which of the metals, aluminium and iron, would catalyse the reaction and what is the...

Iron is obtained in the blast furnace from the ore haematite. Which statement is correct?

Three statements about the carbon cycle are given. 1 The carbon cycle regulates the amount of carbon dioxide in the atmosphere. 2 During photosynth...

Carbon is used in the purification of the water supply. What is the reason for this?

Octane is an alkane with eight carbon atoms per molecule. What is the molecular formula of octane, and how does its boiling point compare with that...

Which equation for the reaction between propane and chlorine is correct?

The monomer, CH3CH=CHCH3, can be used to make an addition polymer. This addition polymer has a chain of carbon atoms joined to each other by C–C si...

Which row correctly shows the structure of a polymer and the monomers from which it is made? [Figures A, B, C, D showing chemical structures for mo...

Which piece of apparatus would be the most suitable for measuring exactly 37.00 cm³ of aqueous ammonia?

When iron reacts with dilute hydrochloric acid, hydrogen is formed. Impurities in the iron mean that some hydrogen sulfide gas is also formed. Hydr...

The following tests are carried out on a sample of green crystals. The crystals are dissolved in water and the resulting solution is divided into t...

Changes of state occur between solids, liquids and gases. Which changes are occurring at P, Q, R and S?

The table shows information about some oxides. For which of the elements nitrogen, phosphorus, sulfur and silicon could this information about thei...

The table contains information about four substances. Which substance is an ionic compound?

What is the nucleon number of the isotope of uranium, ²³⁵₉₂U?

An ionic compound has the formula Al₂O₃. What are the charges on the ions?

Which two pairs of atoms are held together by the same number of bonds?

Boron trifluoride, BF₃, is a simple molecule. There are three covalent bonds in each BF₃ molecule. Each of these bonds is made by sharing one elect...

Which equation is correct for the reaction between carbon dioxide and magnesium hydroxide?

Which mass of oxygen gas combines with exactly 16g of sulfur to form sulfur dioxide, SO₂?

Which compound has an empirical formula that is different from its molecular formula?