Cambridge & Pearson Edexcel Past Paper Questions

The equation shows the reaction for the manufacture of ammonia. N2(g) + 3H2(g) ⇌ 2NH3(g) Which change will decrease the activation energy of the re...

Which ionic equation represents a redox reaction?

The equation shows the reaction for the formation of sulfur trioxide using a catalyst. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = –197 kJ/mol Which change in r...

To which substance is dilute sulfuric acid added to prepare lead(II) sulfate?

Which metal can react with water at r.t.p.?

Which statement about amphoteric oxides is not correct?

Which statement explains why the chemical properties of sodium and potassium are similar?

The diagram shows an outline of part of the Periodic Table. Which statement is not correct?

The diagram shows apparatus that can be used to extract aluminium. What are J, K and L? J | K | L || A negative electrode | aluminium oxide + cryol...

A gas G 1 has no smell, 2 is not poisonous, 3 reacts with hydrogen at high temperature and pressure. What is gas G?

Which method of water purification can be used to obtain drinkable water from seawater?

Which atmospheric pollutant is produced by bacterial decay of vegetable matter?

Substance P reacts with dilute hydrochloric acid to produce a gas. This gas reduces substance Q. What are substances P and Q? P | Q || A copper | c...

Which two statements about alloys are correct? 1 Alloys are formed by mixing two metals. 2 Alloys do not conduct electricity. 3 Atoms in an alloy m...

A powdered mixture of metals contains aluminium, calcium, silver and iron. Excess hydrochloric acid is added until no more mixture dissolves. What ...

Iron rusts when exposed to oxygen in the presence of water. Which method will not slow down the rate of rusting of an iron roof?

A compound has the following structure. Which reactions will occur with this compound? 1 Bromine water will decolourise. 2 It will react with an al...

In the Periodic Table, how many periods are needed to accommodate the elements of atomic numbers 1-18?

A compound X has the molecular formula C4H8O2. It reacts with calcium carbonate to give carbon dioxide. What is X?

Methane is the first member of the alkane series of hydrocarbons. The second member is ethane. Which statements about ethane are correct? 1 Ethane ...

Which alkane, when any one hydrogen atom is substituted by a chlorine atom, will not produce isomers?

When ethanol reacts with ethanoic acid, the ester ethyl ethanoate is formed. C2H5OH + CH3CO2H → CH3CO2C2H5 + H2O What is the formula of the ester f...

The table gives some statements about some macromolecules. 1 fats contain the linkage -O-C(=O)- proteins contain the linkage -C(=O)-N(H)- || 2 poly...

Which of these compounds could react together to form a polymer? 1 H2N(CH2)6NH2 2 CH3(CH2)4COOH 3 HOOC(CH2)4COOH 4 H2N(CH2)6CH3

A student wants to carry out an experiment to follow the rate of the reaction between hydrochloric acid and marble chips. CaCO3 + 2HCl → CaCl2 + CO...

Solutions of lead(II) nitrate and potassium iodide are mixed together in the preparation of lead(II) iodide. Which method can be used to separate t...

A small amount of aqueous copper(II) sulfate is put into a test-tube. A few drops of aqueous ammonia are added to the test-tube. Then an excess of ...

An atom of element Z has 14 neutrons and 13 protons. It forms a positive ion. How many electrons does the ion of Z have?

Which gas is neither an element nor a compound?

The compound formed between elements X and Y is ionic. Which statement about elements X and Y is correct?

The experiment shown is used to test potassium bromide crystals. The lamp does not light. Distilled water is then added to the beaker and the lamp ...

How many electrons are used in covalent bonding in the N2 molecule?

Propene, CH3CH=CH2, has a very low boiling point because of the weakness of the

What is the empirical formula of a compound containing 12g of carbon, 2g of hydrogen and 16g of oxygen only?

What is the correct equation for the reaction taking place at the negative electrode when molten magnesium chloride is electrolysed using inert ele...

Which fertiliser contains the greatest percentage by mass of nitrogen?

Which of these processes are both endothermic?

Which row correctly classifies the oxides in the table?

Which method is used to obtain chlorine from aqueous sodium chloride?

How many of these salts are soluble in water? AgCl Ca(NO3)2 (NH4)2SO4 PbCO3

Which statements about fertilisers containing nitrates are correct? 1 They increase plant growth. 2 Nitrates dissolve in water. 3 Eutrophication is...

Which is a property of the element molybdenum, ⁹⁶₄₂Mo?

The diagram shows the arrangement of electrons in the atoms of four different elements. Which is the least reactive of the four elements?

Substance P reacts with dilute hydrochloric acid to produce a gas. This gas reduces substance Q. What are substances P and Q?

The solid carbonates of three metals, W, X and Y, are heated. Which statements are correct? 1 Metal Y is more reactive than metal X. 2 Metal W is a...

Bond breaking is an endothermic process and bond making is an exothermic process. For which change is it not possible, from the equation, to deduce...

Which row is correct for the reaction of the alkene with steam and a catalyst?

Which of the statements about the preparation and properties of ammonia is correct?

Which structure represents that of an alloy?

Which statements would be true of the compound which has the formula shown? 1 It would react with excess aqueous sodium hydroxide in a 1:1 molar ra...