Cambridge & Pearson Edexcel Past Paper Questions

In the fractional distillation of petroleum, different fractions are obtained at the top and bottom of the fractionating column. Which properties d...

A chlorine atom can replace a hydrogen atom in a molecule of butane, CH3CH2CH2CH3, to form chlorobutane. How many different structural isomers of c...

Two statements are shown. 1 When ethanol is made from glucose by fermentation, each glucose molecule produces three molecules of ethanol. 2 When et...

Polymer X is an addition polymer. The monomer used to make X is but-1-ene. Polymer Y is a condensation polymer. The monomers used to make Y are HOC...

The diagram shows a chromatogram. Which spot has an R_f value of 0.75?

The results of some tests on polluted river water are shown. Which metal ion must be present in the water?

Choose from the list of compounds to answer these questions. calcium oxide carbon dioxide carbon monoxide lead chloride propan-1-ol sodium nitrate ...

This question is about metals.

A student investigates the reaction of small pieces of zinc with dilute hydrochloric acid at 25°C. The dilute hydrochloric acid is in excess.

Concentrated aqueous calcium bromide is electrolysed using graphite electrodes.

Fig. 5.1 shows the displayed formula of compound A. [Figure 5.1]

The equation for the Haber process used in the production of ammonia is shown. N₂ + 3H₂ ⇌ 2NH₃

Dilute ethanoic acid reacts with aqueous calcium hydroxide. 2CH₃COOH + Ca(OH)₂ → (CH₃COO)₂Ca + 2H₂O

Ethanoic acid is manufactured from methanol. CH₃OH(g) + CO(g) ⇌ CH₃COOH(g) The forward reaction is exothermic.

Table 9.1 shows the melting points and relative electrical conductivities of three elements. Table 9.1 | | carbon (graphite) | magnesium | phosphor...

Choose from the list of compounds to answer these questions. ammonia ethanol glucose magnesium chloride magnesium oxide methane nitrogen dioxide p...

A student investigates the reaction of large pieces of calcium carbonate with dilute hydrochloric acid at 25°C. The hydrochloric acid is in excess.

Concentrated aqueous magnesium iodide is electrolysed using graphite electrodes. Predict the product at each electrode. anode cathode

Steam reacts with carbon to produce carbon monoxide and hydrogen. steam + carbon ⇌ carbon monoxide + hydrogen The forward reaction is endothermic.

Dilute hydrochloric acid reacts with aqueous sodium carbonate. 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂ A student titrates 20.0cm³ of 0.0250mol/dm³ aque...

The equation for the reaction of carbon monoxide with hydrogen at a high temperature in a closed container is shown. CO(g) + 2H₂(g) ⇌ CH₃OH(g) ...

Table 9.1 shows the melting points and relative electrical conductivities of three elements. Table 9.1 | | calcium | carbon (diamond) | iodine | |...

Hydrochloric acid, HCl, is neutralised when it is added to aqueous potassium hydroxide, KOH. KOH + HCl → KCl + H₂O The reaction is exothermic. P is...

You are provided with solution X and solution Y. Do the following tests on each solution, recording all of your observations at each stage. Tests ...

You are not expected to do any experimental work for this question. Ammonium sulfate is a salt used in fertilisers. Ammonium sulfate is prepared b...

Sulfuric acid, H2SO4, is neutralised when it is added to aqueous sodium hydroxide, NaOH. The reaction is exothermic. 2NaOH + H2SO4 → Na2SO4 + 2H2O ...

You are provided with solid Y and solution Z. Do the following tests on each substance, recording all of your observations at each stage. Tests on ...

You are not expected to do any experimental work for this question. Copper(II) sulfate is a salt used to kill pests on plant leaves. Copper(II) sul...

Which row shows both a property of a gas and the correct explanation for this property?

When measured under the same conditions of temperature and pressure, which gas diffuses at the same rate as nitrogen?

X and Y are both elements, one of which is a non-metal. 1 mole of X is added to 1 mole of Y and they are heated together. X and Y react completely ...

An ion has an electronic configuration of 2,8,8. It has a 2- charge and a nucleon number of 36. How many neutrons are present in the nucleus of thi...

The formulae for two ions are given. 72X2- 34 X 74 X2- 34 Which statement is correct?

Which pair of molecules have the same number of electrons in covalent bonds?

Chrome alum is a salt that contains two different cations and one anion. The ions present in chrome alum are K+, Cr3+ and SO42-. What is the formul...

The table gives some information about barium and chlorine. Using this information only, a student makes three statements. 1 There is more than one...

Compound X contains carbon, hydrogen and oxygen only. It has an Mr of 90. 100 g of compound X contains 40.0 g of carbon and 6.7 g of hydrogen. How ...

Aqueous copper(II) sulfate is electrolysed using copper electrodes. Which row describes the changes that take place during the electrolysis?

Which row describes one advantage and one disadvantage of using a hydrogen-oxygen fuel cell to power a road vehicle?

Two gases react together to produce a single product. The rate of the reaction is affected by an increase in pressure. The reaction is catalysed by...

Calcium carbonate reacts with excess dilute hydrochloric acid to form carbon dioxide. The reaction is investigated in two experiments. The rate of ...

If calcium carbonate is heated in a closed container, it will decompose, forming calcium oxide and carbon dioxide. Calcium oxide and carbon dioxide...

Copper forms a red oxide, Cu2O, and a black oxide, CuO. In the presence of a catalyst, aqueous hydrogen peroxide, H2O2, decomposes to form water. T...

An organic compound, X, has a molecular formula C4H8O2 and turns damp blue litmus paper red. What is the displayed formula of X?

A student is provided with suitable apparatus, distilled water and the following reagents. solid magnesium hydroxide solid lead carbonate dilute ni...

When heated, copper(II) sulfate crystals, CuSO4•5H2O, react as shown. CuSO4.5H2O(s) → CuSO4(s) + 5H2O(g) When ......1...... copper(II) sulfate, whi...

Which formula represents the oxide of element Z in Group II of the Periodic Table?

Element X is in Group I. Some statements about element X are given. • X is not the least dense element in Group I. • X is more reactive than potass...

A student makes three statements about metals and non-metals. 1 All alloys contain at least one metal. 2 All metals are good thermal and electrical...

The equations for three reactions are given. 1 2O2- → O2 + 4e- 2 C + O2 → CO2 3 CaO + SiO2 → CaSiO3 These reactions take place in the extraction of...