No questions found
When iodine is heated it turns from a solid to a gas.
When liquid ammonia is cooled it turns into a solid.
When ice is heated it turns into water.
Which terms describe these changes of state?
[Table_1]
510
596
573
Which piece of apparatus cannot be used to collect and measure the volume of gas produced in an experiment?
572
551
596
Pure ethanol has a melting point of $-114^{\circ}\text{C}$ and a boiling point of $78^{\circ}\text{C}$.
What are the melting and boiling points of a sample of ethanol with glucose dissolved in it?
[Table_1]
530
567
588
Which atom has an equal number of protons, neutrons and electrons?
502
550
510
The bonding between elements X and Y in compound $XY_2$ is shown.
Which row shows the type of bond in $XY_2$ and the type of element X?
590
593
582
The 'lead' in a pencil is made of a mixture of graphite and clay.
When the percentage of graphite is increased, the pencil slides across the paper more easily.
Which statement explains this observation?
563
588
501
The equation for the reaction between magnesium and dilute sulfuric acid is shown.
The $M_r$ of MgSO$_4$ is 120.
$$\text{Mg} + \text{H}_2\text{SO}_4 \rightarrow \text{MgSO}_4 + \text{H}_2$$
Which mass of magnesium sulfate is formed when 12 g of magnesium completely reacts with dilute sulfuric acid?
567
599
511
The electrolysis of molten lead(II) bromide is shown.
Which statement describes what happens at the negative electrode?
507
524
597
Which statement about the combustion of fuels is correct?
595
500
515
Which statement about chemical reactions is correct?
568
536
586
The diagram shows a rate of reaction experiment.
Increasing the concentration of the acid and increasing the temperature both affect the rate of reaction.
Which row is correct?
514
572
580
Reaction X shows a test for water. Reaction Y occurs in the blast furnace for extracting iron.
$$\text{reaction X} \quad \text{CoCl}_2 + 6\text{H}_2\text{O} \rightleftharpoons \text{CoCl}_2.6\text{H}_2\text{O}$$
$$\text{reaction Y} \quad \text{C} + \text{CO}_2 \rightarrow 2\text{CO}$$
Reaction X is ......1...... . In reaction Y, the oxide CO2 is ......2...... .
Which words correctly complete gaps 1 and 2? [Table_1]
525
503
510
Which equation shows an oxidation reaction?
556
534
501
Which two gases each give the same result for the test shown? [Table_1]
581
558
537
Which methods are suitable for preparing both zinc sulfate and copper(II) sulfate?
1. reacting the metal oxide with warm dilute aqueous sulfuric acid
2. reacting the metal with dilute aqueous sulfuric acid
3. reacting the metal carbonate with dilute aqueous sulfuric acid
557
528
581
Two separate tests are done on separate solutions of compound X.
1. Addition of aqueous sodium hydroxide forms a green precipitate that dissolves in an excess of aqueous sodium hydroxide.
2. Addition of dilute nitric acid and aqueous silver nitrate forms a white precipitate.
What is compound X?
512
520
546
Which statement about the Periodic Table is correct?
560
510
579
Chlorine, bromine and iodine are elements in Group VII of the Periodic Table.
Which statement about these elements is not correct?
573
550
506
Which row describes the properties of a transition element?
[Table_1]
554
522
532
Which statement about the elements in Group VIII is correct?
549
556
556
Stainless steel is an alloy of iron, carbon and other metals. Which row is correct?
[Table_1]
500
508
552
A student is given metal Z and its oxide.
The student does some experiments to find out the position of metal Z in the reactivity series.
The results are shown.
- Metal Z reacted slowly with dilute hydrochloric acid.
- Metal Z reacted slowly with steam but not with water.
- The oxide of metal Z reacted when heated with carbon.
585
529
526
Iron is produced from iron ore in a blast furnace.
Which equation represents the main reaction that happens in zone 1?
588
542
544
Which row describes the use of an alloy and the property upon which the use depends?
[Table with options]
588
560
539
Dry air is passed over hot copper until all the oxygen has reacted.
The volume of gas at the end of the reaction is 120 cm3.
What is the starting volume of dry air?
577
571
548
A steel bicycle which had been left outdoors for several months was starting to rust.
What would not reduce the rate of corrosion?
587
557
537
Which statements about water are correct?
1. Household water contains dissolved salts.
2. Water for household use is filtered to remove soluble impurities.
3. Water is treated with chlorine to kill bacteria.
4. Water is used in industry for cooling.
539
571
564
Ammonium nitrate is a common fertiliser used by farmers to increase the yield of their crops.
Which compound reacts with ammonium nitrate to form ammonia?
589
510
512
Which process does not release a greenhouse gas?
520
542
571
Which row describes the uses of sulfur and sulfur dioxide?
[Table_1]
579
552
590
Limestone is used in many industrial processes. In which process is it not used?
551
514
564
Lime is used to treat an industrial waste.
Which change occurs in the treatment? [Table_1]
573
545
505
What is not the correct use of the fraction named?
[Table_1]
551
600
504
Four organic compounds are listed.
ethane
ethanoic acid
ethanol
ethene
Which bond do all four compounds contain?
536
572
543
Which compounds belong to the same homologous series?
566
550
526
Which substances can be obtained by cracking hydrocarbons?
542
594
598
The equations for two important processes used to manufacture ethanol are shown.
process 1 $C_6H_{12}O_6 \rightarrow 2C_2H_5OH + 2CO_2$
process 2 $C_2H_4 + H_2O \rightarrow C_2H_5OH$
Which statement is not correct?
537
567
530
Part of the label on the packet of a potato product is shown.
This potato product contains:
starch
ethanoic acid
sodium chloride
sugar
Which constituent is a natural polymer?
515
550
522
