Cambridge & Pearson Edexcel Past Paper Questions

When a molecule of a saturated hydrocarbon is cracked, it forms two molecules X and Y. Which row is correct?

The structures and names of three alcohols, P, Q and R are shown. The structures may not be named correctly. Which structures are correctly named?

What is the empirical formula of ethanoic acid?

What is the structure of propyl methanoate?

Which substance, on combustion, produces oxides of nitrogen?

The monomer used to manufacture polystyrene is shown. By which type of polymerisation is polystyrene formed and what is a possible partial structur...

The diagrams show four different methods of collecting gases. Which method is suitable for collecting a gas which has the properties described?

The diagram represents a chromatogram of the colourless acids present in a drink. The chromatogram has been treated with a locating agent. A table ...

Which gas will diffuse at the fastest rate at the same temperature and pressure?

Two particles, K⁺ and Ar, can be written as ³⁹₁⁹K⁺ and ⁴⁰₁⁸Ar. Which statement about these particles is correct?

A mineral deposit is found to contain small grains made entirely of the element carbon. Which property will definitely be true of the grains of car...

How many shared pairs of electrons are there in one carbon dioxide molecule?

Which mass of carbon contains the same number of atoms as 16.0 g of sulfur?

3.0 dm³ of sulfur dioxide is reacted with 2.0 dm³ of oxygen. 2SO2(g) + O2(g) → 2SO3(g) Assuming the reaction goes to completion and that all gases ...

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.