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The table shows the melting and boiling points of four elements.
Which element is a gas at room temperature and pressure?
[Table_1]
501
540
526
Four statements about the arrangement or movement of particles are given.
1. Particles are packed in a regular arrangement.
2. Particles are randomly arranged.
3. Particles move over each other.
4. Particles vibrate about fixed points.
Which statements describe the particles in a pure solid?
568
541
535
One atom of an element contains 12 electrons, 12 protons, and 13 neutrons.
How many nucleons does this atom contain?
547
555
510
A diagram representing a mixture of four particles is shown.
Which statement describes the mixture of particles?
513
520
575
Chlorine reacts with sodium to form sodium chloride. What happens to the sodium atoms during this reaction?
544
528
564
Nitrogen monoxide, NO, is a simple molecular compound.
Which row shows the properties of nitrogen monoxide?
[Table_1]
512
554
599
Metal X is in Group II of the Periodic Table.
X is reacted separately with dilute sulfuric acid and with oxygen.
Which row identifies the products of each reaction?
[Table_1]
500
533
550
What is the relative molecular mass, $M_r$, of sulfuric acid, $H_2SO_4$?
513
557
565
The equation for the production of ammonia, NH\(_3\), is shown. $$\text{N}_2(g) + 3\text{H}_2(g) \rightarrow 2\text{NH}_3(g)$$ Which mass of nitrogen is required to make 51 tonnes of ammonia?
518
547
517
The diagram shows the apparatus used to electroplate a nickel shape with silver. Which row identifies the negative electrode, the positive electrode and the electrolyte? [Table_1]
508
559
523
Concentrated aqueous sodium chloride and dilute sulfuric acid are each electrolysed separately using inert electrodes. Three statements about the electrolysis of these electrolytes are listed.
1. A gas is produced at each electrode for both electrolytes.
2. Oxygen is produced at the cathode for both electrolytes.
3. Hydrogen is produced at the cathode for both electrolytes.
Which statements are correct?
501
586
593
Which reaction pathway diagram represents an endothermic reaction?
536
559
570
The diagram shows a match. By striking the match, a chemical reaction takes place. Which row describes the chemical reaction? [Table_1]
557
533
550
Hydrogen peroxide decomposes to form water and oxygen. The equation is shown.
$$ \text{2H}_2\text{O}_2(l) \rightarrow \text{2H}_2\text{O}(l) + \text{O}_2(g) $$
Manganese(IV) oxide catalyses this reaction.
Which statements about manganese(IV) oxide are correct?
1. It increases the rate of the reaction.
2. It increases the total volume of oxygen gas produced at the end of the reaction.
3. It will have the same mass at the end of the reaction as it does at the start of the reaction.
562
523
541
Four students collect the gas produced from the reaction of calcium carbonate with dilute hydrochloric acid. Each student records the time taken to collect a volume of gas. Which results show the highest average rate of reaction?
536
566
555
The equation for the reaction between hydrogen and oxygen is shown. $$2H_2(g) + O_2(g) \rightarrow 2H_2O(g)$$ Which statement explains why this is a redox reaction?
541
512
559
Which statements about dilute ethanoic acid are correct?
1. It has a pH of 8.
2. It is an organic compound.
3. It turns universal indicator orange-yellow.
4. It reacts with magnesium to produce carbon dioxide.
568
591
596
An aqueous solution of Z turns universal indicator paper purple.
Which row identifies the colour of methyl orange and of thymolphthalein when they are added separately to an aqueous solution of Z?
[Table_1]
520
529
525
Which row describes the solubility of lead(II) chloride and lead(II) sulfate in water? [Table_1]
520
594
541
Four different groups of oxides are shown. 1 MgO FeO CuO 2 CaO SO_2 TiO_2 3 PbO CaO Cl_2O 4 NO_2 Br_2O P_2O_5 Which statement about these groups of oxides is correct?
562
508
573
Four steps in the preparation of a soluble salt from a dilute acid and a solid metal oxide are listed.\n1. Warm the dilute acid.\n2. Evaporate the solution to half of its volume and allow to cool.\n3. Add excess metal oxide.\n4. Filter to remove any unreacted solid.\nWhat is the correct order for these steps?
513
527
591
Which pair of elements react together most violently?
517
570
530
Rubidium is an element in Group I of the Periodic Table.
Which row describes a physical property and a chemical property of rubidium?
[Table_1]
534
522
571
Which row describes the state and colour of bromine at room temperature and pressure? [Table_1]
568
600
596
Part of the Periodic Table is shown. Which element is a metal?
572
589
596
Which compound is made from elements that are all in the same period?
533
577
595
Silver metal is separately tested with cold water, with steam and with dilute hydrochloric acid. Which row identifies the tests that show the chemical reactivity of silver? [Table_1]
533
585
533
Which statement about the extraction of iron from hematite is correct?
533
575
562
The diagram shows an experiment to investigate how paint affects the rusting of iron.
What happens to the water level in tubes S and T?
570
576
534
Which statement describes clean, dry air?
561
578
553
Which word equation describes photosynthesis?
514
551
537
Some adverse effects caused by air pollutants are listed.
- acid rain
- photochemical smog
- respiratory problems
518
523
552
Petroleum is an important raw material that is separated into useful products. Which terms describe petroleum and the method used to separate it? [Table_1]
577
551
592
Which statements about homologous series are correct?
1. All carboxylic acids have similar chemical properties.
2. All alcohols 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.
599
554
579
The formulae of two organic compounds, P and Q, are shown.
P: \( \text{CH}_3\text{CH}_2\text{CH}_2\text{OH} \)
Q: \( \text{CH}_3\text{CH} = \text{CH}\text{CH}_3 \)
Which type of organic compounds are P and Q?
588
597
504
Which fuel is manufactured by fermentation?
568
550
544
Which statement about the disposal of waste plastics is correct?
518
521
549
Dyes are coloured substances. The chromatogram of substance X and four different dyes, 1, 2, 3 and 4, is shown. Substance X contains only two of the dyes 1, 2, 3 and 4. Which two dyes are present in substance X?
542
533
540
The results of two tests on substance G are listed. • A flame test produces a yellow flame. • Substance G is added to aqueous sodium hydroxide and powdered aluminium and warmed carefully. A gas is given off which turns damp red litmus paper blue. What is G?
564
523
558
