Cambridge & Pearson Edexcel Past Paper Questions

Which ion reacts with aqueous ammonia to give a precipitate that dissolves in an excess of ammonia?

Which statement about aqueous sodium chloride is correct?

15.0 cm³ of 1.0mol/dm³ potassium hydroxide just neutralise 20.0 cm³ of a solution of nitric acid. What is the concentration of the acid?

An atom, X, contains 16 protons. Which statement about X is correct?

The equation for the burning of hydrogen in oxygen is shown. 2H2(g) + O2(g) → 2H2O(g) What does this equation indicate?

The diagram shows an apparatus used to compare rates of diffusion. At which labelled position did a white deposit of ammonium chloride form?

Which statement about conduction of electricity is correct?

In terms of electrons, what happens when potassium combines with iodine to form a compound?

Aqueous copper(II) sulfate is electrolysed using copper electrodes. Which equation represents the reaction taking place at the anode (positive elec...

The combustion of methane is exothermic. The equation is given below. CH4 + 2O2 → CO2 + 2H2O What can be deduced from the fact that the reaction is...

How does a catalyst increase the speed of a reaction?

Copper(II) carbonate powder was heated. The loss in mass was plotted against time as shown on the graph. During which time interval is the reaction...

In which equation is the underlined element reduced?

A sample of air was bubbled into water. The pH of the water slowly changed from 7 to 6. Which gas in the sample caused this change?

Which compound is insoluble in water?

The following statements about dilute sulfuric acid are all correct. 1 Addition of Universal Indicator shows that the solution has a pH value of le...

Pieces of material are placed in turn between P and Q in the incomplete electrical circuit shown. Which material would not cause the bulb to light?

Which of the following pairs of compounds react together to produce ammonia? 1. ammonium nitrate and calcium carbonate 2. ammonium nitrate and calc...

Which reaction occurring in the blast furnace is an acid base reaction?

An atom of which element gains three electrons when it forms an ion?

A metal X forms oxides with the formulae XO and X2O3. Where is X in the Periodic Table?

Which pair of metals are not oxidised when added to water? 1. calcium 2. copper 3. potassium 4. silver

Part of the Periodic Table is shown. The letters are not the symbols of the elements. Which statement about the elements is correct?

Three different beakers are set up as shown. In beaker 1 metal W is displaced from solution. In beaker 2 metal X is displaced from solution. In bea...

Which gases are formed during the production of aluminium by electrolysis of molten aluminium oxide?

Which pair of gases could be removed from the atmosphere using calcium carbonate?

In which parts of a motor car do the reactions, shown in the equations, take place?

The diagrams show four monomers. How many of these monomers would react with the molecule below to form a polymer?

For which molecules are the empirical and molecular formulae the same? 1. methanoic acid, HCO2H 2. ethanoic acid, CH3CO2H 3. propanoic acid, C2H5CO...

A compound Y is thought to be an organic acid. Which reaction shows that Y is an organic acid?

A 10 cm³ sample of a gaseous hydrocarbon is completely burnt in oxygen. The total volume of the products is 70 cm³. All gas volumes are measured at...

The boiling points of the alcohols increase as their relative molecular mass increases. Which alcohol has the highest boiling point?

Which of the following is a type of naturally occurring polymer?

Compound Q reacts with bromine to form the compound shown. Which is compound Q?

In which method of separation are Rf values used?

The diagrams show the arrangement of particles in three solids: krypton, potassium and sodium chloride. In which order are the solids shown?

In which pair do neither of the gases change the colour of damp blue litmus paper?

Naturally-occurring bromine has a relative atomic mass of 80 and consists entirely of two isotopes of relative atomic masses 79 and 81. What can be...

Which compound has molecules each of which contains only two covalent bonds?

What can be deduced about two gases that have the same relative molecular mass?

An ionic bond is formed by

Both magnesium oxide, MgO, and aluminium oxide, Al2O3, are solids at room temperature, 25 °C. MgO has a melting point of 2852 °C and a boiling poin...

Which substance conducts an electric current but remains chemically unchanged?

Which statement most clearly indicates that diamond and graphite are forms of carbon?

In an experiment, 1 cm³ of a gaseous hydrocarbon X required 4cm³ of oxygen for complete combustion to give 3 cm³ of carbon dioxide. All gas volumes...

What is the concentration of a solution containing 1.0g of sodium hydroxide in 250 cm³ of solution?

The diagrams show an electrolysis experiment using inert electrodes. Which could be liquid Y?

Which substance, when added to water, does not make a solution that is a good conductor of electricity?

A simple cell is shown below. Which statement about the process occurring when the cell is in operation is correct?

The usual conditions for the Haber process are 250 atm pressure, 450°C and an iron catalyst. Which change in conditions would give the reactants mo...