Cambridge & Pearson Edexcel Past Paper Questions

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?

The diagram shows an outline of part of the Periodic Table. Which statements are correct? 1 Elements W, X and Y form coloured compounds. 2 Elements...

Which of these processes can be used to purify water containing insoluble impurities? 1 chlorination, 2 desalination, 3 distillation, 4 filtration

Which metal can react rapidly with steam but reacts only very slowly with cold water?

A hydride is a compound containing only two elements, one of which is hydrogen. Which element can form the greatest number of different hydrides?

What is not essential for photosynthesis?

A liquid reacts with each of sodium carbonate, potassium hydroxide and ethanol. What is the liquid?

Which compound, on combustion, never forms carbon?

Which of the following is not a condensation polymer?

Which statement about the properties of propane and hexane is correct?

Four compounds are shown. Which pair of compounds have the same empirical formula?

Fats, carbohydrates and proteins all contain which chemical elements?

The structural formulae of some organic compounds are shown below. Which compounds are alcohols?

Which process is suitable for obtaining the water from an aqueous solution of sugar?

Sulfur dioxide and oxygen react together. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔΗ = -197kJ/mol Which change(s) will increase both the rate of reaction and the...