No questions found
Which statement describes the particles in a liquid?
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The apparatus used in a chromatography experiment is shown.
Which line shows the starting depth of the solvent in the beaker?
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Filtration is used to separate mixtures. Which type of mixture is separated by filtration?
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How many neutrons are present in one atom of $^{35}_{17}\text{Cl}$?
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Which statement about an alloy is correct?
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Which statement about compounds is correct?
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Which statement explains why diamond is used in cutting tools?
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Caffeine is a stimulant found in coffee.
Which formula represents caffeine?
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What is the relative formula mass of ammonium sulfate, $(NH_4)_2SO_4$?
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The electrolysis of concentrated aqueous sodium chloride and molten sodium chloride is shown. What are the products at electrodes 1 and 2?
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When an acid is added to an alkali, the temperature of the reaction mixture rises.
Which words describe this reaction?
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Some properties of four fuels are shown.
Which fuel is a gas at room temperature and makes two products when it burns in a plentiful supply of air?
[Table_1]
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Which process is a physical change?
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The volume of gas given off in a chemical reaction is measured over time. The results are shown. At which time is the rate of reaction greatest?
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Which row describes the colours of the named salts?
[Table_1]
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When magnesium is heated with zinc oxide a reaction occurs.
The equation is shown.
$\text{Mg} + \text{ZnO} \rightarrow \text{MgO} + \text{Zn}$
Which substance is oxidised?
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X and Y are oxides of two different elements.
• X reacts with water to produce aqueous solution Z.
• Z turns universal indicator paper blue.
• An aqueous solution of Y reacts with sodium carbonate to produce carbon dioxide gas.
Which statement is correct?
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Copper(II) sulfate is made by reacting excess insoluble solid M and solution N.
Which row identifies M and N and the method used to extract crystals of copper(II) sulfate from the mixture?
[Table_1]
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Which row shows the observation when a few drops of aqueous P is added to concentrated aqueous Q?
[Table 1]
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Which statement about the Periodic Table is correct?
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Elements J and K are in the same period in the Periodic Table.
J reacts with acids to produce a salt and hydrogen.
K reacts with sodium to form an ionic compound.
Which statement about J and K is correct?
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Part of the Periodic Table is shown.
Which element has a high density, a high melting point and forms a brown oxide?
[Image_1: Periodic table with elements labeled A, B, C, D]
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Gas G has 10 electrons. Gas H has eight more electrons than gas G. Both gases are monoatomic.
Which statement about G and H is correct?
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Which property is correct for all metals?
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Silver is below copper in the reactivity series.
Which row describes the reactions of silver?
[Table_1]
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Which types of reaction do hematite and limestone undergo in the blast furnace?
[Table_1]
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Some properties and uses of different metals are shown.
[Table_1]
Which rows link a use of the metal to its stated property?
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The diagram shows a stage in the purification of dirty water.
Which process does this apparatus show?
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Which substance in polluted air damages stonework and kills trees?
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Ammonium nitrate, $\text{NH}_4\text{NO}_3$, is a fertiliser and is added to fields to help crops grow.
Slaked lime, $\text{Ca(OH)}_2$, is an alkali and is added to fields to reduce the acidity of the soil.
Ammonium nitrate and slaked lime should not be added to a field at the same time because they react with each other to form a gas, Z.
What is Z?
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Four reactions are shown.
Which reactions produce water?
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Which element has an oxide that is used as a food preservative?
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Which substance gives off carbon dioxide on heating?
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Which statement about both ethane and ethanol is correct?
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Fuel oil and naphtha are two fractions obtained from petroleum.
What are the major uses of these fractions?
[Table_1]
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Which homologous series of compounds reacts to form an addition polymer?
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What is the total number of shared electrons in ethane, C$_2$H$_6$?
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Which statement about unsaturated hydrocarbons is correct?
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An organic compound X contains two carbon atoms in each molecule.
X reacts with aqueous sodium carbonate to give carbon dioxide.
What is compound X?
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