Cambridge & Pearson Edexcel Past Paper Questions

A sample of magnesium hydroxide, Mg(OH)2, is made by adding an excess of aqueous sodium hydroxide to an aqueous solution containing 1.20 g magnesiu...

When concentrated aqueous sodium chloride is electrolysed using inert electrodes, which product is formed at the cathode and which product is forme...

The diagram shows the energy profile of a chemical reaction. Which row is correct?

The table shows the energy released by the complete combustion of some compounds. Which compound releases the least energy when 1 g is completely b...

An experiment is carried out to measure the rate of reaction between magnesium and dilute hydrochloric acid under two different conditions. The mas...

Hydrogen peroxide decomposes slowly at room temperature. 2H2O2(aq) → 2H2O(l) + O2(g) The reaction can be catalysed by adding manganese(IV) oxide. T...

Reduction can be defined in terms of the gain or loss of oxygen or of hydrogen or of electrons. Which row correctly describes all three definitions...

What is the best method to prepare a sample of silver chloride?

The nitrogenous fertiliser urea has the structure shown. Which percentage, by mass, of nitrogen does it contain?

Ammonia is manufactured by the Haber process. N2(g) + 3H2(g) ⇌ 2NH3(g) ΔH = −92 kJ/mol For this reaction, which rows give a true statement together...

The atomic number of element X is 12. What is the formula of the chloride of X?

Which statement about transition elements is correct?

Metal M is displaced from aqueous M nitrate by copper. Which statement about metal M and its compounds is correct?

Which statement about some of the gases present in air is correct?

Which treatment process is used to disinfect water?

A molecule of compound Q has three C-C single bonds and ten C-H bonds only. It has no other bonds. Which statement about compound Q is correct?

Which reaction is an addition reaction?

Two equations involving ethanol are shown. 1 ethanol + oxygen → oxidation carboxylic acid 2 glucose → fermentation ethanol + carbon dioxide Which r...

Which structure represents propyl methanoate?

Monomer Z is used to make poly(chloroethene). What is monomer Z?

Terylene, a man-made fibre, is used to make clothing. Which row correctly describes how Terylene is manufactured?

Choose from the particles shown to answer the questions. ⁷⁹₃₅Br ³⁵₁₇Cl ³⁷₁₇Cl ²³₁₁Na ¹⁷₈O ³⁹₂₀Ca ³⁷₁₇Cl⁻ ⁶⁴₂₉Cu ²⁰₁₀Ne ¹⁸₈O²⁻ Each particle can ...

The table shows some of the properties of the elements in Group II of the Periodic Table. | element | proton (atomic) number | atomic radius /nm |...

Molybdenum, Mo, is a transition element.

Air is a source of many gases.

Acid U is a compound containing carbon, hydrogen and oxygen.

Propanoic acid is a weak acid. Calcium hydroxide and calcium oxide are bases.

Ammonium carbonate, (NH₄)₂CO₃, is a white solid which decomposes when heated. (NH₄)₂CO₃(s) ⇌ 2NH₃(g) + CO₂(g) + H₂O(g)

A scientist heats a sample of phosphorus(V) chloride in a closed container. A dynamic equilibrium is established. PCl₅(g) ⇌ PCl₃(g) + Cl₂(g)

Food packaging produces lots of waste. This waste includes both plastic and glass.

Cyclobutane and butene are both hydrocarbons. [Figure 10.1]

Choose from the particles shown to answer the questions. CH4 Fe2+ H2S NH4+ C1- H+ MnO4- p3- Each particle can be used once, more than once or no...

The table shows some of the properties of the elements in Group III of the Periodic Table. element | proton (atomic) number | atomic radius /nm | ...

Titanium, Ti, is a metallic element.

Petroleum (crude oil) is an important source of many chemicals.

W is a compound containing carbon, hydrogen and oxygen.

Drinking water is obtained by purification of sea water and river water.

Ammonium iodide, NH4I, is a white solid which decomposes when heated. NH4I(s) → NH3(g) + HI(g)

Nitrogen monoxide reacts with oxygen to form nitrogen dioxide. If this reaction is investigated in a closed system, a dynamic equilibrium is estab...

A sample of waste includes plastic and copper.

The structures of cyclobutanol and butanoic acid are shown. [Figure 10.1]

Copper(II) sulfate is prepared by reacting excess copper(II) carbonate with dilute sulfuric acid. CuCO3(s) + H2SO4(aq) → CuSO4(aq) + CO2(g) + H2O(l...

A paper chromatography experiment is carried out to find an R_f value for Fe³⁺(aq). The result is shown. To make the spot containing Fe³⁺(aq) more ...

Aluminium chloride is dissolved in water and the resulting solution is divided between three test-tubes. Which row gives the reagents for three tes...

Which statement about methods of purification and analysis is correct?

Which changes in pressure and temperature would both result in a decrease in the volume of a fixed mass of gas?

Which definition of isotopes is correct?

Which ion has the most shells that contain electrons?

Which substance conducts electricity both when solid and when molten?

Which substance is an ionic compound?