No questions found
‘Particles moving very slowly from an area of higher concentration to an area of lower concentration.’
Which process is being described?
540
511
567
A student mixes 25 cm$^3$ samples of dilute hydrochloric acid with different volumes of aqueous sodium hydroxide. In each case, the student measures the change in temperature to test if the reaction is exothermic. Which piece of apparatus is not needed?
514
599
517
Information about the solubility of four solids, P, Q, R and S, is given in the table.
[Table_1]
A student attempted to separate mixtures of these solids using the following method:
1. Add the mixture to a beaker of water and stir.
2. Filter the mixture.
3. Crystallise one of the solids from the filtrate.
Which of the following mixtures could not be separated by this method?
588
586
510
The table shows information about atoms of three different elements.
[Table_1]
What are the values of W, X, Y and Z?
600
510
593
The diagrams show the structures of two forms of the same element.
What are the reasons for using T in cutting tools and U as a lubricant?
511
585
501
Ions are formed by elements losing or gaining electrons.
Which statement is correct?
501
500
563
A molecule of X contains two carbon atoms, four hydrogen atoms and two oxygen atoms.
What is the formula of X?
519
588
587
Concentrated aqueous potassium chloride is electrolysed using platinum electrodes.
The solution contains the ions $K^+$, $Cl^-$, $H^+$ and $OH^-$.
Which electrodes are the ions attracted to during this electrolysis?
541
561
588
Which apparatus could be used to electroplate an iron nail with copper?
525
529
579
When anhydrous copper(II) sulfate is added to water a solution is formed and heat is given out.
!
Which row shows the temperature change and the type of reaction taking place?
![Table_1]
598
523
540
The combustion of element X releases large amounts of energy. What is X?
514
528
529
The rate of reaction between magnesium and excess dilute hydrochloric acid was followed by measuring the mass of magnesium present at regular time intervals. Two experiments were performed. Both experiments used 0.1 g of magnesium ribbon. The acid in experiment 1 was less concentrated than in experiment 2. Which graph shows the results of the experiments?
546
558
531
Which reaction is reversible?
587
546
581
Tin is formed when tin(II) oxide is heated with carbon.
What happens to the tin in the tin(II) oxide in this reaction?
504
522
574
Part of the Periodic Table is shown.
Which element forms an acidic oxide?
550
583
549
Four substances, P, Q, R and S, are tested as shown.
[Table_1]
What are P, Q, R and S?
590
543
530
Acids can react with metal oxides, carbonates and metals.
Which reactions produce a gas?
[Table_1]
521
523
593
The apparatus shown is used to prepare aqueous copper(II) sulfate.
What are X and Y?
562
583
574
Which statement about trends in the Periodic Table is not correct?
526
547
582
What is not a property of Group I metals?
595
504
509
Which statement about the element with proton number 54 is correct?
504
584
550
Which element is a transition element?
[Table_1]
590
511
544
Which row describes the trends in the properties of the Group VII elements as the group is descended?
[Table_1] where the table includes columns for colour, density, reactivity with halide ions, and rows labeled A, B, C, D with respective properties.
565
552
574
Four metals are listed in decreasing order of reactivity.
magnesium
zinc
iron
copper
Titanium reacts with acid and cannot be extracted from its ore by heating with carbon.
Where should titanium be placed in the list?
556
570
548
Impure iron from the blast furnace is converted to steel as shown.
Which statement about the process is correct?
571
502
530
A student added dilute hydrochloric acid to four metals and recorded the results. Some of the results are not correct.
[Table_1]
Which two results are correct?
558
524
550
Some properties of three metals, P, Q and R, are shown.
[Table_1]
Which metals would be suitable for use in electrical wiring and aircraft manufacture?
[Table_2]
560
562
593
One sample of sea-water is distilled while another sample of sea-water is filtered. Which statement about the samples is correct?
556
574
549
Air is a mixture of gases.
Which gas is present in the largest amount?
565
571
520
Which information about carbon dioxide and methane is correct? [Table_1]
Table Key: ✓ = true, ✗ = false.
538
527
562
A mixture of two substances, X and Y, is heated. The damp, red litmus paper turns blue. What are X and Y? [Image_1: A test tube containing X and Y being heated with gentle heat and red litmus paper at the top turning blue.]
553
551
534
In the experiment shown, a white precipitate forms in the limewater.
What are X and Y?
591
539
522
Which box corresponds to limestone?
518
542
582
Petroleum is an important fossil fuel.
Which row correctly describes petroleum?
[Table_1]
577
580
511
Butane reacts as shown.
$$\text{butane} \xrightarrow{\text{catalyst and heat}} \text{butene + hydrogen}$$
What is this type of reaction?
501
537
507
Which substance is in the same homologous series as methanol? [Image_1 shows molecular structures of four substances labeled A, B, C, D.]
542
523
532
Which statement could not be correct for an alkane?
513
508
531
In which conical flask will ethanol be produced?
501
539
591
Which row describes what happens when ethanol burns in air?
[Table_1]
547
551
561
