Cambridge & Pearson Edexcel Past Paper Questions

An unsaturated hydrocarbon with six carbon atoms contains only three C=C double bonds. This hydrocarbon is reacted with excess hydrogen at a high t...

Compound Q has the formula C₄H₁₀. Which statement about compound Q is correct?

Hydrolysis of R, a macromolecule, gives a mixture of amino acids. What is R?

When measured under the same conditions, which gas diffuses at the same rate as nitrogen?

When calcium carbonate is added to dilute hydrochloric acid, carbon dioxide gas is released. Three sets of apparatus are shown. Which sets of appar...

Benzene and cyclohexane are both flammable liquids. They are able to mix with each other without separating into two layers. They have very similar...

The graph gives the melting points (m.p.) of mixtures of lead and tin. The graph shows that any mixture of lead and tin must have a melting point t...

When substance Q melts, only weak forces of attraction between its molecules are overcome. Which row correctly describes Q?

A solution containing lead(II) ions is added to a solution containing iodide ions. A yellow precipitate is formed. What is the equation for the rea...

Buckminsterfullerene has the chemical formula C60. How is the structure of buckminsterfullerene best described?

Aqueous sodium hydroxide is added to a sample of a colourless solution. Aqueous ammonia is added to a separate sample of the colourless solution. I...

Which is the best conductor of electricity?

An endothermic reaction has an activation energy of x. Which energy profile diagram is correct for this reaction?

The following statements refer to the use of catalysts in chemical reactions. 1 A catalyst increases the activation energy of a reaction. 2 A catal...

In two experiments, 1 and 2, an excess of powdered calcium carbonate was reacted in a flask with dilute hydrochloric acid. In experiment 1, the car...

Iron(II) ions react with chlorine. 2Fe2+(aq) + Cl2(g) → 2Fe³+(aq) + 2Cl-(aq) Which statement about this reaction is correct?

When water is liquid, it ionises slightly. H2O(l) ⇌ H+(aq) + OH-(aq) The forward reaction is endothermic. When the temperature of water is increase...

The table shows some properties of four metal chlorides. Which row is magnesium chloride?

Which statement about the uses of metals is not correct?

Which row is a transition element?

Element Z combines with sodium to form the compound Na2Z. The positions of four elements are shown on the outline of part of the Periodic Table. Wh...

The table shows the observations made when an aqueous solution of salt Z has different reagents added to it. What is Z?

The diagram shows the apparatus used to extract aluminium from aluminium oxide. Which statement about this process is correct?

In the manufacture of paper, sulfur dioxide is used to remove the yellow colour from the wood pulp. Which term can be used to describe sulfur dioxi...

Which statement about the uses of gases is not correct?

Electrical energy can be generated using simple cells as shown. Which pair of metals, when used as electrodes, will give the largest reading on the...

When reacted with an excess of dilute hydrochloric acid, 0.002 moles of a metal M liberated 48 cm³ of hydrogen measured at r.t.p. Which equation is...

The diagram shows a section of a polymer. Which alkene is used to make this polymer?

The table shows some atmospheric pollutants and their possible effects. Which row is not correct?

Which compound is the most viscous and the least flammable?

How many moles of ethanoic acid, CH3CO2H, react with one mole of magnesium?

Which statement about isomers of a compound is always correct?

How many of the structures show an unsaturated hydrocarbon molecule? [Chemical structures: O=C=O, CH3-CH2-CH2-CH3, CH3-CH=CH2, CH3-C(=O)-OH]

Which type of polymer is made by reacting amino acids together?

Choose from the following compounds to answer the questions below. Ba(NO3)2 CaCO3 CaO CH4 C3H8 Fe2O3 KMnO4 NaNO3 NO SO2 V2O5 Zn(NO3)2 Each of these...

Sulfuric acid is a strong acid.

The alcohols are a homologous series with the general formula CnH2n+1OH. (a) Deduce the molecular formula of the alcohol having eight carbon atoms....

Peroxodisulfate ions, S2O8^2-, react with iodide ions in aqueous solution. S2O8^2-(aq) + 2I-(aq) → 2SO4^2-(aq) + I2(aq) The table shows how the rel...

Potassium chlorate, KClO3, decomposes to form potassium chloride and oxygen. 2KClO3(s) → 2KCl(s) + 3O2(g)

Dry air contains nitrogen, oxygen, argon and other gases.

Ethenyl ethanoate, CH3CO2CH=CH2, is manufactured by passing a mixture of ethanoic acid, ethene and oxygen over a catalyst at 200°C. CH3CO2H + CH2=C...

Ethanol can be manufactured by reacting ethene with steam in a closed reaction vessel. C2H4(g) + H2O(g) ⇌ C2H5OH(g) The reaction is exothermic.

Tin and silver are metals.

A student prepared some crystals of hydrated lithium nitrate by reacting aqueous lithium hydroxide with dilute nitric acid. LIOH + HNO3 + 2H2O → LI...

Choose from the following compounds to answer the questions below. BaCl2 C2H4 C3H4 C3H8 CO CO2 K2SO4 Na3PO4 SO2 ZnSO4 Each of these compounds can b...

Farmers add fertilisers such as ammonium sulfate to the soil to increase the rate of plant growth.

Propanone, CH3COCH3, reacts with iodine, I2, to form colourless products. CH3COCH3 + I2 → CH3COCH2I + HI The reaction is catalysed by hydrochloric ...

Nickel carbonyl, Ni(CO)4, reacts with hydrogen iodide. Ni(CO)4(l) + 2HI(g) → NiI2(s) + H2(g) + 4CO(g)

Sodium and rubidium are alkali metals.

In the contact process, sulfur trioxide is made by the catalytic oxidation of sulfur dioxide. In a closed container the following equilibrium is se...