Cambridge & Pearson Edexcel Past Paper Questions

When butene reacts with bromine, which compound could be made?

The diagram shows part of the Periodic Table. Only some of the elements are shown. H Na Mg K Ca Rb C N O Al Si P Fe Cu Zn

The table shows some properties of the Group 0 elements (noble gases). | element | density of liquid element in g/cm³ | boiling point /°C | |:----...

Paper chromatography can be used to separate metal ions in a mixture and identify them by comparison with known samples of metal ions (A–E).

The diagram shows a simple electrochemical cell. [Figure of a simple electrochemical cell showing a V voltmeter connected to a positive electrode ...

A student titrates 20.0 cm³ of a metal hydroxide, M(OH)2, of concentration 0.060mol/dm³ with a strong acid of concentration 0.050mol/dm³. It requir...

Parts of the structures of silicon dioxide and poly(ethene) are shown below. [Figure showing the structure of silicon dioxide as a giant molecular...

Three important processes in the carbon cycle are combustion, respiration and photosynthesis.

Bromate(V) ions, BrO3¯, react with bromide ions, Br¯, in acidic solution to form bromine. BrO3¯(aq) + 5Br¯(aq) + 6H⁺(aq) → 3Br2(aq) + 3H2O(l)

The diagram shows part of the Periodic Table. Only some of the elements are shown. H C N F Si P S Cl Ti Fe Cu Zn As Br

The table shows some properties of the Group I metals. metal | density in g/cm³ | melting point /°C | boiling point /°C ---|---|---|--- lithium | 0...

Seawater contains a variety of dissolved salts. (a) The diagram shows a simple distillation apparatus that can be used to produce purified water fr...

Sulfuric acid reacts with the alkali sodium hydroxide. H2SO4 + 2NaOH → Na2SO4 + 2H2O

The table below shows the reactivity of five metals with either cold water or steam or with both. metal | reactivity ---|--- barium | reacts rapidl...

The structures of sodium chloride and chlorine are shown below. [Figure showing a sodium chloride lattice structure (Cl⁻ Na⁺ ions) and two chlorine...

The alkanes are a homologous series of hydrocarbons.

The ester, ethyl ethanoate, reacts with hydroxide ions to form ethanoate ions and ethanol. CH3COOC2H5 + OH¯ → CH3COO¯ + C2H5OH ethyl ethanoate etha...

Ammonia is manufactured by the Haber process. Fe catalyst N2 + 3H2 ⇌ 2NH3 ΔH = -92.4kJ/mol The table below shows how the percentage yield of ammoni...

Which process is used in the preparation of soluble salts?

Two containers, one of methane and one of butane, are placed at the same distance from a naked flame. Both gases are released at the same time. The...

Metal X oxidises in air. The formula of the oxide is XO. X displaces zinc from aqueous zinc nitrate. Which could be X?

Which is a compound?

How is a calcium ion, Ca2+, formed from a calcium atom?

An oxygen atom contains 8 electrons, 8 protons and 10 neutrons. What is the nucleon number of this atom?

A molecule of sulfuric acid has the structural formula shown. How many electrons are involved in forming all the covalent bonds in one molecule?

A metal consists of a lattice of positive ions in a ‘sea of electrons'. What happens to the electrons and positive ions in a metal wire when an ele...

The equation shown represents the neutralisation of aqueous sodium hydroxide with dilute sulfuric acid. 2NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2H2O(l...

Which change in conditions increases the energy of particles in a reaction?

Which change is endothermic?

The enthalpy changes when methane, butane and octane are burned completely in oxygen are shown below. Which are the enthalpy changes when propane a...

In the ionic solid zinc phosphide, Zn3P2, what is the formula of the phosphide ion?

Iron is produced in the blast furnace. Which statement about this process is correct?

The energy profile diagram for a reaction is shown. Which statement is correct?

Which occurs during the electrolysis of dilute sulfuric acid?

Methanol is made in industry by a reaction between carbon monoxide and hydrogen. CO(g) + 2H2(g) ⇌ CH3OH(g) ΔΗ = −90 kJ/mol The process is usually c...

Which statement about graphite is not correct?

Ammonium nitrate, NH4NO3, is an artificial fertiliser produced from ammonia. What is an advantage of using ammonium nitrate as a fertiliser?

Four metals and hydrogen are arranged in order of decreasing reactivity. [Figure 23.1] Which statement about these elements is correct?

Which pair of substances reacts to form a salt and water only?

An element is burned in an excess of oxygen. Which statement about the oxide formed is always correct?

Which reaction does not involve neutralisation?

Which element described in the table is a transition metal?

An alloy of aluminium is used in the construction of aircraft. Why is pure aluminium never used?

What happens when a strip of silver is immersed in an aqueous solution of copper(II) sulfate?

The flow chart shows how impure water can be treated to produce drinkable water. What is not removed from the water by this process?

Which alcohol will, on oxidation, produce CH3CH2CO2H?

The diagram shows the structure of an organic acid. Which row is correct?

A carbohydrate such as starch can be represented as shown. What is X?

P is a polymer that • has six carbon atoms in each of the monomers from which it was formed, • is not a polyester, • was formed using condensation ...

What are the products of photosynthesis?