Cambridge & Pearson Edexcel Past Paper Questions
Browse 35,704 questions from Cambridge O-Level & A-Level and Pearson Edexcel IGCSE & IAL exams. Click any question to practice.
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...
Chlorine can be manufactured by the following reaction. 4HCl(g) + O2(g) ⇌ 2H2O(g) + 2Cl2(g) ΔH is negative A mixture in dynamic equilibrium is form...
Equations for reactions of iron and iron compounds are shown. Fe + 2HCl → FeCl2 + H2 2FeCl2 + Cl2 → 2FeCl3 FeSO4 + Mg → Fe + MgSO4 FeSO4 + 2NaOH → ...
Which is a use of sulfuric acid?
The table shows the solubility of some compounds of metal Q in cold water. salt | solubility in cold water ---|--- carbonate | insoluble chloride ...
A metal M forms a chloride which dissolves in cold water and has an oxide which dissolves in both strong acids and strong alkalis. What is M?
Which element has a variable oxidation state, can act as a catalyst and forms coloured compounds?
An atom of which element has the same electronic configuration as the strontium ion?
The boiling points of gaseous elements increase as the size of their atoms increases. Which of these noble gases has the highest boiling point?
The sentence describes two metals and their oxides. Metal X could be copper because its oxide is ......1.... and metal Y could be ......2.... becau...
Which gas could be used to convert copper(II) oxide to copper?
Aluminium and copper are often used to make coins but iron is not. Which statement explains this?
In the electrolysis of molten aluminium oxide for the extraction of aluminium, the following three reactions take place. 1 Al3+ + 3e⁻ → Al 2 2O2⁻ →...
Which two substances are removed from the bottom of the blast furnace? 1 coke 2 iron 3 limestone 4 slag
An alloy of copper and zinc is added to an excess of dilute hydrochloric acid. The resulting mixture is then filtered. Which observations are corre...