No questions found
Which statement describes the particles in a liquid?
557
565
559
The apparatus used in a chromatography experiment is shown.
Which line shows the starting depth of the solvent in the beaker?
569
589
593
Filtration is used to separate mixtures. Which type of mixture is separated by filtration?
571
511
501
How many neutrons are present in one atom of $^{35}_{17}\text{Cl}$?
599
571
500
Which statement about compounds is correct?
574
587
533
Which statement explains why diamond is used in cutting tools?
526
560
545
Caffeine is a stimulant found in coffee.
Which formula represents caffeine?
584
578
578
What is the relative formula mass of ammonium sulfate, $(NH_4)_2SO_4$?
528
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528
The electrolysis of concentrated aqueous sodium chloride and molten sodium chloride is shown. What are the products at electrodes 1 and 2?
563
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574
When an acid is added to an alkali, the temperature of the reaction mixture rises.
Which words describe this reaction?
521
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563
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]
571
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551
Which process is a physical change?
509
531
575
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?
580
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533
Which row describes the colours of the named salts?
[Table_1]
593
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569
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?
541
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566
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?
500
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541
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]
511
592
516
Which row shows the observation when a few drops of aqueous P is added to concentrated aqueous Q?
[Table 1]
596
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555
Which statement about the Periodic Table is correct?
511
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591
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?
526
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547
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]
519
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524
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?
543
548
558
Which property is correct for all metals?
524
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521
Silver is below copper in the reactivity series.
Which row describes the reactions of silver?
[Table_1]
527
576
501
Which types of reaction do hematite and limestone undergo in the blast furnace?
[Table_1]
579
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557
Some properties and uses of different metals are shown.
[Table_1]
Which rows link a use of the metal to its stated property?
518
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547
The diagram shows a stage in the purification of dirty water.
Which process does this apparatus show?
560
509
546
Which substance in polluted air damages stonework and kills trees?
534
541
574
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?
536
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558
Which element has an oxide that is used as a food preservative?
591
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572
Which substance gives off carbon dioxide on heating?
518
533
599
Which statement about both ethane and ethanol is correct?
589
554
545
Fuel oil and naphtha are two fractions obtained from petroleum.
What are the major uses of these fractions?
[Table_1]
508
586
574
Which homologous series of compounds reacts to form an addition polymer?
589
583
511
What is the total number of shared electrons in ethane, C$_2$H$_6$?
514
545
542
Which statement about unsaturated hydrocarbons is correct?
522
500
598
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?
558
560
562
