Cambridge & Pearson Edexcel Past Paper Questions

Choose from the following compounds to answer the questions. H H H—C—C—о-н H H A H2C-CH2 H2C-CH2 H B Ο H3C-C-C-о-н H C H H3C / c=c H3C CH3 D H O HO...

Oxygen, sulfur, selenium, tellurium and polonium are in Group VI.

There is concern about the disposal of plastics made from non-biodegradable polymers.

Zinc bromide and zinc carbonate are both ionic compounds.

Petroleum (crude oil) provides the raw materials for making ethanol and ammonia.

Sulfur dioxide and oxides of nitrogen are pollutants found in air.

Sulfamic acid, NH₂SO₃H, is a white crystalline solid. It reacts with aqueous sodium nitrite to make nitrogen gas, as shown in the equation. NH₂SO₃H...

Lead is a metal with proton number 82.

The structure of ethyl propenoate is shown. H HO H H c=c-c—0—C—C—H H HH

A scientist needs to add approximately 100 cm³ of water to each of 50 large beakers. The scientist needs to fill the beakers as quickly as possible...

Four mixtures, each containing two substances, are shown in the table. The two substances need to be separated and collected. Which row is correct?

Two samples of a colourless solution are tested separately with aqueous sodium hydroxide, NaOH(aq), and aqueous ammonia, NH3(aq), and the results a...

Which row correctly describes changes in the particles when a substance freezes?

Ethylamine gas, C2H5NH2, and hydrogen chloride gas, HCl, react together to form a white solid, ethylamine hydrochloride. At which position in the t...

Two particles have the symbols ⁵⁴₂₆Fe²⁺ and ⁵⁹₂₇Co³⁺. Which statement about these particles is correct?

Two isotopes of chlorine are ³⁵Cl and ³⁷Cl. Using these isotopes and ¹²C and ¹H, how many different relative molecular masses are possible for the ...

Which statement about the substances, at room temperature and pressure, is correct?

A piece of magnesium reacts with dilute hydrochloric acid. The resulting solution is then evaporated leaving a solid residue of magnesium chloride....

Which dot-and-cross diagram represents carbon dioxide? Only outer shell electrons are shown.

Two statements about the structure and properties of metals are given. statement 1 Metals are malleable and have high melting points. statement 2 M...

How many different elements are present in ammonium nitrate?

Aqueous calcium hydroxide is an alkali. It is neutralised by dilute nitric acid to produce calcium nitrate and water. What is the ionic equation fo...

The relative molecular mass, Mr, of liquid Z is 60. Z contains 40.0% carbon, 6.70% hydrogen and 53.3% oxygen. Which row shows the correct empirical...

How many tonnes of aluminium oxide, Al2O3, are required to produce 27 tonnes of aluminium?

Lead(II) bromide is electrolysed using inert electrodes. Which statement is correct?

Compound X is sodium iodide, NaI. Compound Y is methyl methanoate, HCO2CH3. At room temperature and pressure, ......1...... solid. In aqueous solut...

For the forward reaction of a reversible reaction, the enthalpy change of reaction, ΔH, is –50 kJ/mol and the activation energy, Ea, is +60 kJ/mol....

The diagram shows a titration experiment. Which row about the reaction in the conical flask is correct?

Sulfur dioxide reacts with oxygen in the air. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = –196 kJ/mol The reaction is very slow if no catalyst is present. Which...

Nitrogen dioxide, NO2, is a dark brown gas that decomposes as shown in the equation. 2NO2(g) dark brown ⇌ 2NO(g) + O2(g) colourless The diagram s...

Concentrated hydrochloric acid is oxidised by manganese(IV) oxide, MnO2. What are two products of this reaction?

The table gives some information about four redox reactions. Which row gives correct information about what is oxidised and the evidence that this ...

Which statement about acids and bases is correct?

Some types of chemical reaction are listed. 1 acid-base 2 combustion 3 redox Which types of reaction occur in a blast furnace during the extraction...

Which method should be used to make a pure sample of potassium chloride?

A pure sample of lead sulfate is made by reacting aqueous solutions of two salts. The lead sulfate formed is then separated from the mixture. Which...

Element Y is in Period 3 of the Periodic Table. It forms a chloride that is a liquid at room temperature. Which row shows correct information about...

Which gases are used in light bulbs? 1 argon 2 oxygen 3 neon

The carbonates of metals W, X and Y are heated and the results are shown. These experimental results can be used to write statements about W, X and...

The diagram shows an experiment to determine the percentage of oxygen in air. Which diagram shows the correct level of water after the candle stops...

Two statements are given. statement 1 The percentage of carbon by mass is greater in methane than in butane. statement 2 Butane is one of two isome...

One mole of each of the compounds shown is completely combusted. C5H12O C6H12 C6H14 C6H14O How many of the compounds need exactly nine moles of oxy...

The reactants and products of two reactions are shown. reaction 1 C3H6 + H2O → X reaction 2 X + O2 → CO2 + H2O Which row correctly describes these ...

Which statement about carboxylic acids is correct?

The structure of an ester is shown. What is the name of this ester?

Poly(ethene) is formed by ......1...... polymerisation of ethene. The formation of nylon and Terylene are examples of ......2...... polymerisation....

The repeat unit of a polymer is shown. Which monomer would produce this polymer?

A student investigates the rate of reaction between calcium carbonate and hydrochloric acid. The volume of gas in the syringe is recorded after one...

Some reactions of an aqueous solution of compound X are given. • When a few drops of aqueous sodium hydroxide are added, a white precipitate is for...

Which set of changes to the conditions increases the volume of a gas?