No questions found
Which row describes the spacing and arrangement of particles in a solid, a liquid and a gas? [Table_1]
534
574
541
Which piece of apparatus is used to measure exactly 25.0 cm$^3$ of hydrochloric acid?
520
530
513
A mixture contains salt, sand, and sulfur.
Salt dissolves in water but not in xylene.
Sulfur dissolves in xylene but not in water.
Sand does not dissolve in water or xylene.
What is the order of the processes used to separate the salt, the sand and the sulfur from the mixture?
525
588
519
The structure of an atom is shown.
key: \(\bullet\) = electron, n = neutron, p = proton
Which row shows the nucleon number and proton number of this atom? [Table_1]
575
567
599
Which statements about potassium bromide are correct?
1. It has a high melting point.
2. It dissolves in water.
3. It conducts electricity when solid.
510
574
514
Which row describes the bonding in graphite and a use of graphite?
[Table_1]
585
598
513
Caffeine is a stimulant found in coffee. Which formula represents caffeine?
535
578
565
The fuel ethane, $\text{C}_2\text{H}_6$, burns in air to form carbon dioxide and water.
$$2\text{C}_2\text{H}_6 + 7\text{O}_2 \rightarrow 4\text{CO}_2 + 6\text{H}_2\text{O}$$
Which statement about burning ethane is correct?
534
600
592
Which statement about the electrolysis of concentrated aqueous sodium chloride is correct?
591
556
576
When an acid is added to an alkali, the temperature of the reaction mixture rises. Which words describe this reaction?
547
562
579
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]
531
584
533
Which process is a physical change?
554
524
539
A student adds excess zinc to dilute hydrochloric acid at 25°C. The hydrogen gas produced is collected and measured at room temperature and pressure. The results are plotted and labelled as curve X on the graph. The experiment is repeated at 50°C with all other conditions remaining the same. Which graph shows the results at 50°C?
571
593
512
Substance Y is a pink solid. When substance Y is heated gently it becomes a blue solid. When the blue solid is cooled down it remains blue. When water is added to the blue solid it becomes pink. What is substance Y?
540
552
536
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?
594
542
593
The diagram shows an experiment.
A small volume of aqueous P is poured on to solid Q and the tap of the funnel closed.
Which pairs of substances cause the syringe to fill with gas? [Table_1]
600
600
578
Part of the Periodic Table is shown.
Which elements form basic oxides?
561
515
597
Aqueous ammonium sulfate is made by reacting aqueous ammonia with dilute sulfuric acid. How is solid ammonium sulfate obtained from the resulting solution?
556
600
512
Which statement about the Periodic Table is correct?
598
560
509
Part of the Periodic Table is shown. Which element conducts electricity?
575
590
522
Some information about properties of Group I elements is shown.
[Table_1]
What are the values for X, Y and Z?
554
502
544
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?
534
515
554
Metal M is placed between zinc and iron in the reactivity series.
Which row shows the reactions of M and its oxide?
[Table_1]
595
571
542
Which statement about sodium is correct?
570
568
539
Iron from a blast furnace can be converted to steel.
Which statements about steel are correct?
1. Steel contains more carbon than the iron obtained from the blast furnace.
2. Steel is produced by blowing oxygen through the iron.
3. Calcium oxide is added to molten iron to remove basic oxides.
513
532
506
Which row links a property of aluminium to its stated use?
| property | use | |
|---|---|---|
| A | high strength | food containers |
| B | resistance to corrosion | food containers |
| C | high density | manufacture of aircraft |
| D | good electrical conductivity | manufacture of aircraft |
599
552
502
The diagram shows a stage in the purification of dirty water.
Which process does this apparatus show?
523
523
519
Which substance in polluted air damages stonework and kills trees?
595
572
515
Which reaction produces ammonia gas?
588
517
585
Which reactions produce carbon dioxide?
1. addition of dilute nitric acid to copper(II) carbonate
2. heating zinc carbonate
3. combustion of methane
552
505
546
Which element has an oxide that is used as a food preservative?
544
500
568
Which substance gives off carbon dioxide on heating?
522
593
525
Fuel oil and naphtha are two fractions obtained from petroleum. What are the major uses of these fractions? [Table_1]
516
530
589
Which compound is a member of the alkene homologous series?
585
593
549
Which type of covalent bond is found in both a molecule of methane and a molecule of ethane?
595
526
583
A large hydrocarbon undergoes cracking. A smaller hydrocarbon, X, and a gas are the only two products. Which row identifies hydrocarbon X and the gas?
[Table_1]
541
561
567
The structures of two hydrocarbons, M and N, are shown.
Which statement is correct?
543
595
521
Some information about four substances, P, Q, R and S, is listed.
P is made by combining many small molecules together.
Molecules of Q are the largest molecules found in petroleum.
R is produced by cracking alkanes.
S is nylon.
Which substances are synthetic polymers?
576
515
577
