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Which row describes the arrangement and motion of the particles in a liquid?
[Table_1]
589
500
545
Which piece of apparatus is used to measure 24.8 $\text{cm}^3$ of gas produced during a reaction?
577
598
525
Calcium carbonate is insoluble in water. Sodium chloride is soluble in water.
Which sequence of steps is used to obtain a pure, dry sample of calcium carbonate from a mixture of calcium carbonate and aqueous sodium chloride?
542
543
544
A student uses paper chromatography to identify the food dyes in a coloured sweet, S. The student uses four known food dyes, W, X, Y, and Z, and ethanol as the solvent. The chromatogram obtained is shown. Which statements are correct?
1 S contains only two dyes.
2 X is insoluble in ethanol.
3 S contains Y and Z.
4 S contains W.
572
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The structure of an atom is shown.
Which element is the atom an isotope of?
566
552
509
What happens when sodium atoms combine with chlorine atoms to form sodium chloride?
548
520
546
Which row describes the formation of single covalent bonds in methane? [Table_1]
591
553
582
The compound magnesium nitrate has the formula $\text{Mg(NO}_3\text{)}_2$.
What is the relative formula mass of magnesium nitrate?
577
529
544
Which substance does not produce a gas at both electrodes during electrolysis?
589
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583
Which row describes the changes that occur when metals burn in oxygen?
[Table_1]
560
591
581
Which process is a physical change?
571
550
595
A student reacts strips of zinc with dilute sulfuric acid and measures the time taken to produce 100 cm$^3$ of hydrogen.
The experiment is repeated using different conditions.
The results are shown in the table.
[Table_1]
Which changes in conditions produce the results shown in experiment 2?
1 Add a catalyst.
2 Dilute the acid.
3 Use zinc powder.
4 Heat the acid.
532
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When blue-green crystals of nickel(II) sulfate are heated, water is produced and a yellow solid remains. When water is added to the yellow solid, the blue-green colour returns.
Which process describes these changes?
595
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577
Zinc is formed when zinc oxide is heated with carbon.
$$\text{zinc oxide + carbon} \rightarrow \text{zinc + carbon monoxide}$$
Which substance is oxidised in this reaction?
576
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529
Which row shows the colours of litmus and methyl orange with solutions of acids and bases?
[Table_1]
577
585
535
The positions of elements W, X, Y and Z in the Periodic Table are shown. Which elements form basic oxides?
501
573
592
Copper(II) sulfate is made when copper(II) carbonate reacts with dilute sulfuric acid.
$\text{CuCO}_3 + \text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{H}_2\text{O} + \text{CO}_2$
Pure copper(II) sulfate crystals are obtained.
Which reagent is in excess and how are the crystals obtained?
[Table]
581
538
591
Two separate tests are done on a solution of a compound, X.
The results are shown.
1 Adding aqueous ammonia forms a blue precipitate that dissolves in an excess of aqueous ammonia.
2 Adding dilute nitric acid and aqueous barium nitrate forms a white precipitate.
What is X?
588
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566
Part of the Periodic Table is shown.
Which row describes W, X, Y and Z?
504
593
562
Which statement about the properties of elements in Group I and in Group VII is correct?
512
542
523
Some information about four elements, P, Q, R and S, is shown.
[Table_1]
Which elements are transition elements?
547
596
552
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?
533
546
546
The diagrams show the structure of two substances used to make electrical conductors.
Which statement correctly describes X and Y?
593
517
552
Three metals, L, M, and N, are added separately to dilute hydrochloric acid and cold water. The results are shown.
[Table]
What is the order of reactivity of the metals?
558
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521
Iron is extracted from its ore in a blast furnace.
Hematite, coke, limestone and hot air are added to the furnace.
Which explanation is not correct?
577
532
548
Aluminium is used to make containers for storing food.
Which property makes it suitable for this use?
592
600
574
Water can be treated by filtration then chlorination.
Which uses do not need water of this quality?
1 water for cooling in industry
2 water for washing clothes
3 water for drinking
567
559
524
Which statement about acid rain is not correct?
516
600
575
The diagram shows an experiment to investigate how paint affects the rusting of iron.
What happens to the water level in tubes P and Q?
587
581
555
Which gas is produced when ammonium chloride is warmed with aqueous sodium hydroxide?
591
534
523
Which statement describes a disadvantage of sulfur dioxide?
587
513
526
The diagram represents a lime kiln used to heat limestone to a very high temperature.
What leaves the kiln at X?
589
537
577
The structures of four compounds are shown.
Which row gives the names of the compounds?
[Table_1]
530
515
553
Which fuel could be gasoline?
[Image_1: Flowchart]
510
517
559
A hydrocarbon W burns to form carbon dioxide and water. W decolourises bromine water. What is the name of W and what is its structure? [Table_1]
515
556
581
Which statements about homologous series are correct?
1. All members have similar chemical properties.
2. All members have the same molecular mass.
3. Ethane and ethene are members of the same homologous series.
4. Ethane and propane are members of the same homologous series.
522
590
537
Which statements about ethanol are correct?
1. It can be made by fermentation.
2. It is an unsaturated compound.
3. It burns in air and can be used as a fuel.
548
588
561
Which statement about aqueous ethanoic acid is correct?
596
540
506
Which substances are synthetic polymers?
1. *Terylene*
2. nylon
3. protein
4. poly(ethene)
509
591
579
