Cambridge & Pearson Edexcel Past Paper Questions

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...

Propenenitrile, CH2=CHCN, is made by passing a mixture of propene, ammonia and oxygen over a catalyst at 450°C. CH3CH=CH2 + NH3 + 1½O2 → CH2=CHCN +...

Both copper and magnesium are metals.

A student prepared some crystals of hydrated copper(II) sulfate by reacting excess insoluble copper(II) oxide with dilute sulfuric acid. CuO + H2SO...

A purple pill is placed in a beaker of water. The beaker is left for several hours. The diagram shows the appearance of the water when the pill is ...

The results of two tests on solution X are shown. Which ion is present in solution X?

Which diagram shows the arrangement of particles inside a balloon containing a mixture of the gases nitrogen and oxygen?

A student follows the rate of the reaction between marble chips, CaCO₃, and dilute hydrochloric acid. CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O Which diagra...

Equal masses of methane gas are stored under different conditions. Under which set of conditions does the methane gas occupy the smallest volume?

A particle of an isotope of sulfur contains 18 neutrons and 18 electrons. What is the symbol for this particle?

When two elements react together, a compound is formed. Which statement is correct?

Which statement is correct for all ionic compounds?

When a piece of sodium is heated in air, it reacts with oxygen to form the ionic compound sodium oxide, Na₂O. In terms of electrons, which statemen...

The relative atomic mass of chlorine is 35.5. What is the mass of 2 moles of chlorine gas?

The empirical formula of a liquid compound is C₂H₄O. To find the empirical formula, it is necessary to know