No questions found
In which changes do the particles move further apart?
$$\text{W} \rightleftharpoons \text{Y} \text{ (gas)}$$
$$\text{X} \rightleftharpoons \text{Z} \text{ (liquid)}$$
$$\text{X} \rightleftharpoons \text{Z} \text{ (solid)}$$
574
560
544
A sample of a dye is investigated by chromatography.
A line is drawn across a piece of chromatography paper and a spot of the dye is placed on it.
The paper is placed in water.
Which row is correct?
[Table_1]
594
591
570
One of the instructions for an experiment reads as follows.
Quickly add 50 $\text{cm}^3$ of acid.
What is the best piece of apparatus to use?
552
567
586
Diamond and graphite are macromolecules.
Which statement about diamond and graphite is not correct?
540
573
558
The table shows the electronic structure of four atoms.
[Table_1]
Which two atoms combine to form a covalent compound?
575
561
576
An aluminium atom has a nucleon number of 27 and a proton number of 13.
How many neutrons does this aluminium atom contain?
580
579
598
What happens when a bond is formed between a green gaseous element and a soft metallic element?
546
579
507
The equation shows the reaction between magnesium and sulfuric acid. [A_r: H, 1; O, 16; Mg, 24; S, 32]
$$ \text{Mg} + \text{H}_2\text{SO}_4 \rightarrow \text{MgSO}_4 + \text{H}_2 $$
In this reaction, which mass of magnesium sulfate is formed when 6g of magnesium react with excess sulfuric acid?
579
555
516
The diagram shows an electrical cable.
Which statement about the substances used is correct?
571
591
590
When substance X is electrolysed, the amount of gases P and Q formed is shown.
What is substance X?
530
580
553
The energy level diagram for the reaction between sodium hydrogen carbonate and dilute hydrochloric acid is shown.
Which row correctly describes the type of reaction and the energy of the reactants and products?
575
579
594
The diagram shows some properties that substances may have.
To which labelled part of the diagram does $^{235}U$ belong?
568
559
580
A liquid X reacts with solid Y to form a gas. Which two diagrams show suitable methods for investigating the rate (speed) of the reaction?
508
532
596
An experiment, S, is carried out to measure the volume of hydrogen produced when excess dilute sulfuric acid is added to zinc.
A second experiment, T, is carried out using the same mass of zinc but under different conditions.
The results of the two experiments are shown.
Which changes in the conditions between experiments S and T give curve T?
558
537
565
Aluminium reacts with iron(III) oxide as shown.
iron(III) oxide + aluminium \( \rightarrow \) iron + aluminium oxide
Which statement about this reaction is correct?
556
552
551
Which reaction is reversible?
507
502
523
Which statements are properties of an acid?
1 reacts with ammonium sulfate to form ammonia
2 turns red litmus blue
[Table_1]
503
586
584
Part of the Periodic Table is shown.
Which element forms an acidic oxide?
504
579
593
A method used to make copper(II) sulfate crystals is shown.
1. Place dilute sulfuric acid in a beaker.
2. Warm the acid.
3. Add copper(II) oxide until it is in excess.
4. Filter the mixture.
5. Evaporate the filtrate until crystals start to form.
6. Leave the filtrate to cool.
What are the purposes of step 3 and step 4? [Table_1]
594
528
575
The results of two tests on solid X are shown.
[Table_1]
What is X?
577
562
541
Where in the Periodic Table is the metallic character of the elements greatest? [Table_1]
556
541
598
Some properties of four elements, P, Q, R and S, are shown in the table.
Two of these elements are in Group I of the Periodic Table and two are in Group VII.
[Table_1]
Which statement is correct?
507
564
510
Which of the following could be a transition element?
[Table_1]
529
522
583
Two statements about argon are given.
1. Argon has a full outer shell of electrons.
2. Argon is very reactive and is used in lamps.
Which is correct?
544
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576
Three students, X, Y and Z, were told that solid P reacts with dilute acids and also conducts electricity.
The table shows the students' suggestions about the identity of P.
[Table_1]
X | Y | Z
copper | iron | graphite
Which of the students are correct?
534
507
532
W, X and Y are metals, one of which is copper and one of which is iron.
- W has a coloured oxide which can be reduced by carbon.
- X has a black oxide and is also found in nature as a pure metal.
- Y has an oxide which cannot be reduced by carbon.
[Table_1]
503
585
559
Tin is a metal that is less reactive than iron and is extracted from its ore cassiterite, SnO\(_2\).
Which statements about tin are correct?
1. Tin can be extracted from cassiterite using carbon.
2. Tin does not conduct electricity.
3. Tin is hard and shiny.
597
548
536
Which statement about the uses of metals is correct?
545
520
502
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?
537
586
556
A new planet has been discovered and its atmosphere has been analysed.
The table shows the composition of its atmosphere.
[Table_1]
Which gases are present in the atmosphere of the planet in a higher percentage than they are in the Earth's atmosphere?
586
596
578
Water was added to separate samples of anhydrous cobalt(II) chloride and anhydrous copper(II) sulfate.
Which row describes the colour changes that take place in these reactions?
[Table_1]
549
530
598
Which pollutant found in air does \textbf{not} have an effect on respiration?
572
571
533
A farmer’s soil is very low in both nitrogen (N) and phosphorus (P).
Which fertiliser would improve the quality of this soil most effectively?
[Table_1]
533
548
520
When limestone is heated it forms lime (calcium oxide) and carbon dioxide.
$\text{CaCO}_3(s) \rightarrow \text{CaO}(s) + \text{CO}_2(g)$
Which statement is not correct?
585
515
557
The diagram shows the separation of petroleum into fractions.
What could X, Y and Z represent?
549
519
554
Which of the compounds shown are in the same homologous series?
1. $CH_3OH$
2. $CH_3CH_2OH$
3. $CH_3COOH$
4. $CH_3CH_2CH_2OH$
548
540
513
Compound Q decolourises bromine water.
Compound Q has two carbon atoms in each molecule.
Which statement about compound Q is correct?
595
512
570
What is used in the production of ethanol from ethene?
587
570
582
Ethene forms an addition polymer as shown.
Which terms describe this polymer?
559
509
586
The diagram shows a molecule of an organic compound W.
Which statement is not correct?
583
523
543
