Diagrams of the three states of matter for carbon dioxide are shown.
Which two diagrams show the states of matter before and after the sublimation of carbon dioxide?
A student measures the time taken for 2.0 g of magnesium to dissolve in 50 cm3 of dilute sulfuric acid.
Which apparatus is essential to complete the experiment?
1 stop-clock
2 measuring cylinder
3 thermometer
4 balance
Which method is used to separate a mixture of the following liquids?
Which substance should be pure for the intended use?
Which row identifies an alloy, a pure metal and a non-metal?
Information about the structures of three atoms, X, Y and Z, is shown.
Which statements about atoms X, Y and Z are correct?
1 They are isotopes of the same element.
2 They contain the same number of electrons.
3 They contain the same number of neutrons.
4 They contain one occupied electron shell.
What happens to an atom when it becomes an ion with a charge of +1?
Which equation for the decomposition of calcium nitrate is correct?
The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes.
At which electrodes is hydrogen produced?
Overhead power cables made from (steel-cored) aluminium are used to carry electricity over long distances.
Which property of (steel-cored) aluminium makes it suitable for use in power cables?
Which row identifies a chemical change and a physical change?
The equation for the reaction when hydrogen is used as a fuel is shown.
Which statement about this reaction is correct?
Which fuels release carbon dioxide when burned?
1 gasoline
2 hydrogen
3 methane
Water is added to anhydrous copper(II) sulfate.
What happens during the reaction?
Excess magnesium ribbon is reacted with a fixed volume of hydrochloric acid and the volume of gas given off over time is measured.
The results of two different experiments are shown.
Which statement explains the differences between the results of the two experiments?
Which products are formed when magnesium hydroxide reacts with hydrochloric acid?
The oxides of two elements, X and Y, are separately dissolved in water and the pH of each solution tested.
Which information about X and Y is correct?
An acid is neutralised by adding an excess of an insoluble solid base.
A soluble salt is formed.
How is the pure salt obtained from the reaction mixture?
Three separate samples of an aqueous compound T are tested.
The results of the tests are shown.
What is T?
Part of the Periodic Table is shown.
Which element is a metal?
The elements sodium to argon form Period 3 of the Periodic Table.
Which row describes the trend across Period 3 from left to right?
Lithium, sodium and potassium are elements in Group I of the Periodic Table.
Which statement about these elements is correct?
Which statement describes a transition element?
Which diagram represents the arrangement of the outer-shell electrons of a noble gas?
Which statements about the general properties of metals are correct?
1 They are good conductors of heat and electricity.
2 They have low melting points.
3 They react with dilute acids to form a salt and water.
4 They react with oxygen to form basic oxides.
Reactions of three metals and their oxides are shown.
What is the order of reactivity of these metals, from most reactive to least reactive?
Which uses of the metals shown are correct?
Which statement about the reactions in the blast furnace is correct?
Iron rusts when exposed to air.
Which two substances in air cause iron to rust?
Fertilisers are used to provide three of the elements needed for plant growth.
Which two compounds would give a fertiliser containing all three of these elements?
Which process produces methane?
Which statements about sulfur dioxide are correct?
1 Sulfur dioxide decolourises acidified potassium manganate(VII).
2 Sulfur dioxide forms when acids react with carbonates.
3 Sulfur dioxide is used as a bleach.
4 Sulfur dioxide is used to treat acidic soil.
What are the products when limestone (calcium carbonate) is heated strongly?
In which lists are the compounds in the same homologous series?
Which row about aqueous ethanoic acid and dilute hydrochloric acid is correct?
Some properties of colourless liquid L are listed.
● It boils at 65C.
● When added to water, two layers form which do not mix.
● It does not react with sodium carbonate.
● It has no effect on bromine water.
What is L?
A molecule of compound P contains two carbon atoms and four hydrogen atoms.
Which row represents P?
The equation representing the reaction of a hydrocarbon with water is shown.
What are the values of x and y?
Many molecules of J join together in reaction R to form a long chain molecule K.
K is the only product.
Which row describes molecule J, reaction R and molecule K?