Cambridge & Pearson Edexcel Past Paper Questions

Chlorine can be manufactured by the following reaction. 4HCl(g) + O2(g) ⇌ 2H2O(g) + 2Cl2(g) ΔH is negative A mixture in dynamic equilibrium is form...

Equations for reactions of iron and iron compounds are shown. Fe + 2HCl → FeCl2 + H2 2FeCl2 + Cl2 → 2FeCl3 FeSO4 + Mg → Fe + MgSO4 FeSO4 + 2NaOH → ...

Which is a use of sulfuric acid?

The table shows the solubility of some compounds of metal Q in cold water. salt | solubility in cold water ---|--- carbonate | insoluble chloride ...

A metal M forms a chloride which dissolves in cold water and has an oxide which dissolves in both strong acids and strong alkalis. What is M?

Which element has a variable oxidation state, can act as a catalyst and forms coloured compounds?

An atom of which element has the same electronic configuration as the strontium ion?

The boiling points of gaseous elements increase as the size of their atoms increases. Which of these noble gases has the highest boiling point?

The sentence describes two metals and their oxides. Metal X could be copper because its oxide is ......1.... and metal Y could be ......2.... becau...

Which gas could be used to convert copper(II) oxide to copper?

Aluminium and copper are often used to make coins but iron is not. Which statement explains this?

In the electrolysis of molten aluminium oxide for the extraction of aluminium, the following three reactions take place. 1 Al3+ + 3e⁻ → Al 2 2O2⁻ →...

Which two substances are removed from the bottom of the blast furnace? 1 coke 2 iron 3 limestone 4 slag

An alloy of copper and zinc is added to an excess of dilute hydrochloric acid. The resulting mixture is then filtered. Which observations are corre...

Which aqueous reagent liberates ammonia from ammonium nitrate on warming?

An aqueous solution of a compound X reacts with • aqueous zinc chloride to form a white precipitate which dissolves when X is in excess, • aluminiu...

CFC compounds were commonly used as aerosol propellants. The structure of one CFC compound is shown. Which element in this compound causes a deplet...

Which gas is most likely to react with limestone?

The diagram shows the structure of an ester. What are the starting materials for making this compound?

Which information is correct regarding the formation of ethanol by the process of fermentation? substances fermented | gas evolved during fermenta...

Nylon, poly(ethene) and Terylene are macromolecules. In which of these macromolecules is the C=O group present in the linkage?

Which partial structure is correct for the product of polymerisation of butene, CH2=CHCH2CH3?

Glucose is a simple sugar. Glycine is an amino acid. In the diagram, which two arrows correctly show the hydrolysis products of a carbohydrate and ...

When crude oil is distilled several products are obtained. What is the correct order of their boiling points? highest boiling point | | lowest boi...

Which statement is not correct?

A radioactive isotope of carbon has more nucleons than the non-radioactive isotope, ¹²C. How many protons, neutrons and electrons could there be in...

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

The scheme shows a sequence of reactions starting from compound Y. What could the compound Y be?

Which electronic configurations represent three metallic elements in the same period of the Periodic Table?

Graphite is often used as the electrodes in the electrolysis of solutions. Which particles are involved in the conduction of electricity by graphite?

Element X has a lattice of positive ions and a 'sea of electrons'. Which property will X have?

An element, E, forms a hydride, EH₄, which contains 90.0% by mass of E. If the relative atomic mass of hydrogen is 1, what is the relative atomic m...

A piece of chalk has a mass of 23.0g. Chalk is impure calcium carbonate. When analysed, the chalk is found to contain 0.226 moles of pure calcium c...

Aqueous potassium iodide, KI(aq), can be used as a test reagent in redox reactions. Iodide ions are readily ......X...... . A positive result for t...

Which element is most likely to be used as an industrial catalyst?

Which solution containing one mole per dm³ of the compound would have the lowest pH?

Which statement about oxides is correct?

Bitumen, diesel, naphtha and paraffin (kerosene) are all fractions obtained by the fractional distillation of petroleum. Which row gives a correct ...

In which circuit does the bulb light?

An element is in Period 3 and Group VII of the Periodic Table. Which statement about this element is correct?

The table contains information about the physical properties of the elements chlorine, copper and iron. In the table above, what are the correct va...

Petroleum is separated into fractions by fractional distillation. Which fraction distils off at the highest temperature?

Ammonia is made by a reversible reaction between nitrogen and hydrogen. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔH = −92 kJ/mol What is the effect of increasing t...

Aqueous copper(II) sulfate is electrolysed using copper electrodes. The current is constant and the anode (positive electrode) is weighed at regula...

In the extraction of aluminium by electrolysis, its oxide is dissolved in molten cryolite. Cryolite is a sodium salt. Aluminium is deposited at the...

Which substance is not a raw material used in the manufacture of sulfuric acid?

A student mixed together aqueous solutions of Y and Z. A white precipitate formed. Which could not be Y and Z?

Which property would all the hydrogen compounds of the Group VII elements possess?

Which particle is found in iodine vapour?

What suggests that metal M is not in Group I of the Periodic Table?