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The diagram shows some changes of state.
Which words describe the changes of state, P, Q, R and S?
555
508
568
The diagram shows part of a thermometer.
What is the reading on the thermometer?
556
598
558
Pure water has a boiling point of 100 °C and a freezing point of 0 °C.
What is the boiling point and freezing point of a sample of aqueous sodium chloride? [Table_1]
525
505
523
Pure copper(II) sulfate crystals can be made by adding copper(II) oxide to hot dilute sulfuric acid. The copper(II) oxide is added until it ......1...... . The solution is ......2...... and then ......3...... to obtain the pure crystals. Which words complete gaps 1, 2 and 3?
595
599
532
Which part of an atom has a relative mass of 1 and a relative charge of 0?
516
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519
Which molecule contains exactly two single covalent bonds?
584
531
511
Sodium reacts with chlorine to form sodium chloride.
Which statements describe what happens to the sodium atoms in this reaction?
1. Sodium atoms form positive ions.
2. Sodium atoms form negative ions.
3. Sodium atoms gain electrons.
4. Sodium atoms lose electrons.
593
500
523
Diamond is extremely hard and does not conduct electricity. Which statement explains these properties?
511
521
581
What is the relative formula mass of ammonium nitrate, NH$_4$NO$_3$?
531
591
592
Concentrated aqueous sodium chloride is electrolysed. What is the main product formed at the positive electrode (anode)?
590
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511
Some properties of four fuels are shown in the table.
Which fuel is a gas at room temperature and makes two products when it burns in a plentiful supply of air?
[Table_1]
517
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540
Which statements about exothermic and endothermic reactions are correct?
1. During an exothermic reaction, heat is given out.
2. The temperature of an endothermic reaction goes up because heat is taken in.
3. Burning methane in the air is an exothermic reaction.
566
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533
When sulfur is heated it undergoes a ......1...... change as it melts. Further heating causes the sulfur to undergo a ......2...... change and form sulfur dioxide. Which words complete gaps 1 and 2?
536
526
593
Which row correctly matches the experiment and observations to the identity of the underlined substance?
[Table_1]
538
504
572
A student was investigating the reaction between marble chips and dilute hydrochloric acid.
Which changes slow down the rate of reaction?
589
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584
The reactions shown may occur in the air during a thunderstorm.
$N_2 + O_2 \rightarrow 2NO$
$2NO + O_2 \rightarrow 2NO_2$
$NO + O_3 \rightarrow NO_2 + O_2$
Which row shows what happens to the reactant molecules in each of these reactions?
590
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580
Hydrochloric acid is added to magnesium metal and to sodium carbonate in separate tests. Which row shows the observations? [Table_1]
585
532
521
Which oxide dissolves in water to form a basic solution?
526
529
595
Which salt preparation uses a burette and a pipette?
522
547
515
Substance X reacts with warm dilute hydrochloric acid to produce a gas which decolourises acidified aqueous potassium manganate (VII).
Substance X gives a yellow flame in a flame test.
What is X?
530
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541
Part of the Periodic Table is shown. Which element is a soft solid that reacts violently with cold water?
534
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580
Which element is less reactive than the other members of its group in the Periodic Table?
570
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515
An element has the following properties.
● It forms coloured compounds.
● It acts as a catalyst.
● It melts at 1539°C.
In which part of the Periodic Table is the element found?
560
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557
Why are weather balloons sometimes filled with helium rather than hydrogen?
556
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573
Element E:
● forms an alloy
● has a basic oxide
● is below hydrogen in the reactivity series.
What is E?
514
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597
Some reactions of three metals and their oxides are shown.
[Table_1]
What is the order of reactivity of the metals?
577
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513
Which statement about the extraction of iron in a blast furnace is not correct?
515
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572
Stainless steel is an alloy of iron and other metals. It is strong and does not rust but it costs much more than normal steel.
What is not made from stainless steel?
508
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587
The diagram shows some uses of water in the home. For which uses is it important for the water to have been treated?
580
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599
Two experiments involving water are described.
1. Water turns purple when potassium manganate(VII) is added to it.
2. Adding water to sodium causes the temperature to increase.
Which row describes the role of water in 1 and 2?
513
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501
In which process is carbon dioxide \textbf{not} formed?
548
526
552
Which statement is not correct?
559
572
565
The structures of three substances are shown.
Why do these substances all belong to the same homologous series?
589
589
566
Which fraction of petroleum is not matched to its correct use?
[Table_1: Contains fractions and their corresponding uses]
581
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587
Cracking is an important process in the petroleum industry.
The products of cracking include ......1...... and an ......2...... of ......3...... relative molecular mass than the ......4...... that was cracked.
Which words complete gaps 1, 2, 3 and 4?
[Table_1]
556
560
556
Which compound rapidly decolourises aqueous bromine?
536
537
535
There are two methods for producing ethanol.
method 1 catalytic addition of steam to ethene
method 2 fermentation
Which statement is not correct?
578
529
543
Which statement about aqueous ethanoic acid is not correct?
567
510
505
The diagram shows part of the molecule of a polymer.
Which diagram shows the monomer from which this polymer could be manufactured?
568
547
593
