No questions found
Which row describes the separation and motion of particles in a gas?
[Table_1]
569
523
590
Which burette shows a reading of 12.1 cm³?
506
542
513
A solution of sodium chloride is mixed with a solution of silver nitrate.
A white precipitate of silver chloride and a colourless solution of sodium nitrate are formed.
Which method is used to separate the silver chloride from the mixture?
566
518
550
Which two particles have the same electronic structure?
576
553
514
Magnesium reacts with oxygen to form magnesium oxide.
In the reaction, each magnesium atom ......1...... two ......2...... .
Which words complete gaps 1 and 2?
549
592
598
Which row about the structures and uses of diamond and graphite is correct?
[Table_1]
579
573
578
Caffeine is a stimulant found in coffee.
[Image_1: Structural formula of caffeine]
Which formula represents caffeine?
515
562
588
Iron reacts with sulfuric acid to form iron(II) sulfate.
What is the equation for this reaction?
595
522
544
Which apparatus is used to plate a nickel object with silver?
556
571
568
When an acid is added to an alkali, the temperature of the reaction mixture rises.
Which words describe this reaction?
506
550
504
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]
551
554
578
Which process is a physical change?
524
502
518
Dilute hydrochloric acid is reacted with excess calcium carbonate and the total volume of gas is measured at regular intervals. The results are shown by line W on the graph. The experiment is repeated but with one change. The results of the second experiment are shown by line X on the graph.
Which change is made in the second experiment?
567
570
548
When hydrated copper(II) sulfate is heated, it produces white copper(II) sulfate. When water is added, the white copper(II) sulfate turns blue.
Which type of reaction is shown by these observations?
540
585
528
When magnesium is heated with zinc oxide a reaction occurs.
The equation is shown.
$\text{Mg + ZnO} \rightarrow \text{MgO + Zn}$
Which substance is oxidised?
596
504
572
Which row about sodium oxide and sulfur dioxide is correct?
[Table_1]
569
596
528
Copper(II) sulfate is a soluble compound that is made by reacting copper(II) oxide with dilute sulfuric acid.
This can be completed in the following steps.
1 Add excess copper(II) oxide to dilute sulfuric acid and heat the mixture.
2 Filter off any unreacted copper(II) oxide.
3 Heat to remove most of the water from the filtrate.
4 Leave the solution to cool and filter off the solid copper(II) sulfate which forms.
Which row shows the processes used in this preparation?
[Table showing processes: crystallisation, distillation, evaporation with rows A, B, C, D]
543
584
534
Tests are done on an aqueous solution.
[Table_1]
Which cations produce these observations?
1. aluminium, $Al^{3+}$
2. calcium, $Ca^{2+}$
3. zinc, $Zn^{2+}$
590
599
550
Which statement about the Periodic Table is correct?
507
501
581
Elements E and F are in Group I of the Periodic Table.
E has a higher melting point than F.
Elements J and L are in Group VII of the Periodic Table.
J has a higher density than L.
Which elements have the highest atomic numbers in each group?
553
505
510
What is a characteristic property of a transition element?
588
514
513
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?
591
553
546
Which statements about the metals zinc, magnesium, iron and sodium are correct?
1. They all conduct electricity.
2. They all have high melting points and boiling points.
3. They all form negative ions.
4. They all react with dilute acids to form hydrogen.
518
560
533
Which statement about the reactions of metals is correct?
587
565
581
Which metal is obtained by heating its oxide with carbon?
560
543
530
Which row links the property of the stated metal with its use?
[Table_1]
518
516
590
The diagram shows a stage in the purification of dirty water.
Which process does this apparatus show?
507
555
532
Which substance in polluted air damages stonework and kills trees?
574
591
558
A farmer has four different compounds that are used in fertilisers.
[Table_1]
Which two compounds are mixed to make an NPK fertiliser?
592
507
502
Waste vegetables are placed in a sealed container with air and left for a number of days.
Bacteria cause the vegetables to decompose. During the decomposition the bacteria respire.
What happens to the concentration of carbon dioxide and methane in the air in the container?
568
504
599
Which element has an oxide that is used as a food preservative?
543
583
531
Which substance gives off carbon dioxide on heating?
574
574
560
Which rows show the correct name for the structure shown? [Table_1]
596
580
597
Fuel oil and naphtha are two fractions obtained from petroleum.
What are the major uses of these fractions?
[Table_1]
546
526
515
Which statement explains why members of the same homologous series have similar chemical properties?
509
579
592
Which molecules are unsaturated hydrocarbons?
518
500
537
The results of tests carried out on an organic compound are shown.
[Table_1]
test result
appearance colorless liquid
effect of adding aqueous bromine no reaction
effect of applying a lighted splint burns
effect of adding litmus turns red
What is the organic compound?
541
518
545
Which word equation represents a reaction that occurs with ethanoic acid?
570
537
534
Four substances are listed.
1 carbohydrate
2 ethanol
3 protein
4 sodium chloride
Which substances are natural polymers?
593
584
551
