Cambridge & Pearson Edexcel Past Paper Questions

The diagram shows an outline of part of the Periodic Table. Which statements are correct? 1 Elements W, X and Y form coloured compounds. 2 Elements...

Which of these processes can be used to purify water containing insoluble impurities? 1 chlorination, 2 desalination, 3 distillation, 4 filtration

Which metal can react rapidly with steam but reacts only very slowly with cold water?

A hydride is a compound containing only two elements, one of which is hydrogen. Which element can form the greatest number of different hydrides?

What is not essential for photosynthesis?

A liquid reacts with each of sodium carbonate, potassium hydroxide and ethanol. What is the liquid?

Which compound, on combustion, never forms carbon?

Which of the following is not a condensation polymer?

Which statement about the properties of propane and hexane is correct?

Four compounds are shown. Which pair of compounds have the same empirical formula?

Fats, carbohydrates and proteins all contain which chemical elements?

The structural formulae of some organic compounds are shown below. Which compounds are alcohols?

Which process is suitable for obtaining the water from an aqueous solution of sugar?

Sulfur dioxide and oxygen react together. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔΗ = -197kJ/mol Which change(s) will increase both the rate of reaction and the...

The scheme shows a sequence of reactions starting from compound Y. What could the compound Y be?

The apparatus shown can be used to find the rate of some chemical reactions. The rate of which reaction can be followed using this apparatus?

Crude oil is fractionally distilled in a fractionating column. The positions at which fractions X and Y are collected are shown. Which statement is...

An ion X⁺ has 23 nucleons and 10 electrons. What does the nucleus of X contain?

Which element exists as a macromolecule?

Which substance can conduct electricity by the movement of ions?

The diagram shows the molecule ethyl propanoate. Consider all the electrons in a molecule of ethyl propanoate. How many electrons not involved in b...

Sodium and magnesium are next to each other in the Periodic Table. Which statement explains the differences in the melting and boiling points of th...

Sulfuric acid and potassium hydroxide can react together to form potassium hydrogensulfate, KHSO4, and water only. Which amounts of the reactants a...

The diagram shows the structures of the atoms of elements L and M. The elements combine to form a compound. What is the mass of one mole of this co...

A concentrated aqueous solution of sodium chloride is electrolysed. What are the equations for the reactions taking place at the cathode (negative ...

What is observed during the electrolysis of aqueous copper(II) sulfate using carbon electrodes?

Nitrogen monoxide is an atmospheric pollutant that is formed in car engines by the reaction between nitrogen and oxygen. N₂(g) + O₂(g) → 2NO(g) ΔΗ ...

Which substance does not react with hydrochloric acid?

The table shows the energy released by the complete combustion of some compounds used as fuels. Which fuel releases the least energy when 1 g of th...

In which circuit does the bulb light?

Ammonia is made by a reversible reaction between nitrogen and hydrogen. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔΗ = −92 kJ/mol What is the effect of increasing t...

Which change involves reduction?

Samples of three oxides, X, Y and Z, were added separately to dilute hydrochloric acid and to dilute sodium hydroxide. X and Y react with dilute hy...

Which process does not involve the use of a transition element?

Element Q is in Period 3 of the Periodic Table. It can form ions with the formula Q³⁻. Which element is most likely to be Q?

Aluminium is extracted from its molten oxide ore by electrolysis whereas zinc is extracted by reduction of its oxide when heated with coke. Which s...

In which solid can layers of atoms slide over each other?

Which ion causes the acidity in dilute hydrochloric acid?

Which gas turns moist blue litmus paper red and produces a precipitate when bubbled through calcium hydroxide solution?

The diagram shows three steps in the manufacture of sulfuric acid. In which steps is a catalyst used?

Which property of compounds in a homologous series is correct?

Which process is an example of cracking?

Compound X and compound Y combine to form a polymer. Which of the statements about the polymer and its formation is not correct?

The structural formulae of some organic compounds are shown below. Which compounds are alcohols?

What is the partial structure of the polymer formed by the polymerisation of propene, CH₃CH=CH₂?

Choose from the following gases to answer the questions below. CCIF3 CH4 CO CO2 H2 N2 NH3 O2 SO2 Each gas can be used once, more than once or not a...

Farmers use chemicals to improve crop yield. Ammonium phosphate, (NH4)3PO4, is used as a fertiliser and calcium hydroxide, Ca(OH)2, is used to redu...

Proteins, carbohydrates and fats are natural macromolecules. The partial structure of a protein is shown below. [Figure shows a repeating peptide l...

Only liquids that contain moving ions can be electrolysed. These liquids are called electrolytes. (a) Complete the following table which shows the ...

Haematite, limestone and coke are heated together in a blast furnace in the manufacture of iron.