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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?
539
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A student measures the time taken for 2.0 g of magnesium to dissolve in 50 cm$^3$ of dilute sulfuric acid.
Which apparatus is essential to complete the experiment?
1 stop-clock
2 measuring cylinder
3 thermometer
4 balance
598
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566
Which method is used to separate a mixture of the following liquids?
[Table_1]
509
546
558
Which substance should be pure for the intended use?
540
562
527
Which row identifies an alloy, a pure metal and a non-metal?
[Table_1]
599
537
541
Information about the structures of three atoms, X, Y, and Z, is shown.
[Table_1]
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.
574
538
552
What happens to an atom when it becomes an ion with a charge of +1?
597
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566
The relative atomic mass, $A_r$, of an element is determined by comparing the mass of one atom of the element with the mass of one atom of element Q.
What is Q?
508
533
532
Which equation for the decomposition of calcium nitrate is correct?
523
582
567
The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes.
At which electrodes is hydrogen produced?
507
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513
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?
508
575
534
Which row identifies a chemical change and a physical change? [Table_1]
519
518
503
The equation for the reaction when hydrogen is used as a fuel is shown.
$2H_2 + O_2 \rightarrow 2H_2O$
Which statement about this reaction is correct?
598
509
561
Which fuels release carbon dioxide when burned?
1. gasoline
2. hydrogen
3. methane
569
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531
Water is added to anhydrous copper(II) sulfate. What happens during the reaction?
583
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578
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?
589
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597
Which products are formed when magnesium hydroxide reacts with hydrochloric acid?
577
513
555
The oxides of two elements, X and Y, are separately dissolved in water and the pH of each solution tested.
[Table_1]
Which information about X and Y is correct?
511
542
580
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?
591
554
565
Three separate samples of an aqueous compound T are tested.
The results of the tests are shown.
[Table_1]
What is T?
567
551
508
Part of the Periodic Table is shown.
Which element is a metal?
522
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571
The elements sodium to argon form Period 3 of the Periodic Table.
Which row describes the trend across Period 3 from left to right?
[Table_1]
540
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509
Lithium, sodium and potassium are elements in Group I of the Periodic Table. Which statement about these elements is correct?
551
569
570
Which statement describes a transition element?
504
536
508
Which diagram represents the arrangement of the outer-shell electrons of a noble gas?
523
502
562
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.
550
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580
Reactions of three metals and their oxides are shown.
[Table_1]
What is the order of reactivity of these metals, from most reactive to least reactive?
543
539
565
Which uses of the metals shown are correct?
[Table_1]
576
552
589
Which statement about the reactions in the blast furnace is correct?
583
545
573
Iron rusts when exposed to air.
Which two substances in air cause iron to rust?
542
558
575
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?
536
578
561
Which process produces methane?
537
596
590
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.
535
512
588
What are the products when limestone (calcium carbonate) is heated strongly?
592
512
589
In which lists are the compounds in the same homologous series?
1. CH$_4$, C$_2$H$_4$, C$_3$H$_8$
2. CH$_3$OH, C$_2$H$_5$OH, C$_3$H$_7$OH
3. CH$_3$CO$_2$H, CH$_3$CH$_2$OH, CH$_3$CH$_2$CH$_2$OH
516
578
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Which row about aqueous ethanoic acid and dilute hydrochloric acid is correct?
[Table_1]
549
556
587
Some properties of colourless liquid L are listed.
• It boils at 65°C.
• 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?
574
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583
A molecule of compound P contains two carbon atoms and four hydrogen atoms. Which row represents P?
[Table_1]
541
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517
The equation representing the reaction of a hydrocarbon with water is shown.
$C_xH_y + H_2O \xrightarrow{\text{catalyst}} C_xH_5OH$
What are the values of $x$ and $y$?
[Table_1]
551
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567
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?
[Table_1]
535
556
523
