Cambridge & Pearson Edexcel Past Paper Questions

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...

The following facts are known about four metals, P, Q, R and S. 1 R displaces both P and S from aqueous solutions of their ions. 2 Q reacts with wa...

Which metal has to be extracted from its ore by electrolysis?

Aluminium is produced by the electrolysis of molten aluminium oxide. Which statement about the process is correct?

Hydrides are compounds of an element and hydrogen only. Which statement is not correct?

In the extraction of iron from its ore in the blast furnace, limestone is added. What is the function of the limestone?

Two pieces of iron, one with zinc attached and the other with copper attached, are placed separately in water as shown. Which statements are correc...

A diagram of a biogas generator is shown. The gas, if collected, can be used as a fuel. However, if the gas is allowed to escape it becomes an atmo...

Which statement about alkanes is correct?

Which statement about members of the homologous series of alcohols is correct?

The diagram shows the partial structure of a polymer. Which pair of reagents could have been used to form this polymer?

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

Which statement about the properties of the four alkanes from methane to butane is not correct?

Choose from the following organic compounds to answer the questions below. butane butanoic acid butyl ethanoate ethanol ethyl butanoate methane met...

Some calcium compounds are used by farmers.

Ozone molecules are continually being broken down and formed in the upper atmosphere.

Two isotopes of sulfur are ³²₁₆S and ³³₁₆S.

The flow chart shows some reactions of copper(II) nitrate, Cu(NO3)2. black solid CuO(s) brown gas A colourless gas that relights a glowing splint...

An aqueous solution of ammonium nitrite, NH4NO2, decomposes when heated gently. NH4NO2(aq) → N2(g) + 2H2O(l)

Molybdenum is a transition element. It is used to make steel that is extremely hard. Molybdenum can be manufactured by heating together molybdenum(...

Large quantities of poly(chloroethene) are manufactured annually. The flow chart shows the steps involved in the manufacture of poly(chloroethene)....

Alkanes are a homologous series of saturated hydrocarbons. The table shows information about some alkanes. alkane molecular formula melting point /...

Choose from the following compounds to answer the questions opposite. [Figure A1.1]

Hydrogen reacts with halogens to form hydrogen halides.

Two isotopes of phosphorus are 31P and 32P.

The flow chart shows some reactions of iron(II) sulfate, FeSO4. [Figure A4.1]

Electrolysis is often used in the extraction and purification of elements.

Ammonium carbonate, (NH4)2CO3, is a white solid that is a component of ‘smelling salts'. It decomposes when it is heated. (NH4)2CO3(s) → 2NH3(g) + ...

Titanium can be manufactured by heating titanium(IV) chloride, TiCl4, with magnesium.

The flow chart shows the steps involved in the manufacture of poly(propenenitrile). [Figure B8.1]

Alkenes are a homologous series of unsaturated hydrocarbons. The table shows information about some alkenes. [Figure B9.1]

Which oxide is amphoteric?

Four gas jars each contain one of the gases ammonia, chlorine, hydrogen chloride and oxygen. A strip of damp blue litmus paper and a strip of damp ...

How can a pure sample of barium sulfate be obtained from barium carbonate?

The symbols for two ions are shown. ¹⁹F⁻ ²¹Na⁺ Which statement is correct?

Which dot-and-cross diagram, showing all the outer shell electrons of each atom, is not correct?

Which statement shows that graphite and diamond are different forms of the element carbon?