No questions found
Which row describes the arrangement and motion of particles in a solid?
[Table_1]
503
587
591
A student measures 25.00 cm3 of dilute hydrochloric acid accurately.
Which apparatus is most suitable?
502
522
581
Which sequence is used to separate a soluble salt from a mixture of a soluble and an insoluble salt?
563
599
524
Which diagram shows the correct level of the solvent at the start of a chromatography experiment?
566
506
562
Which statement about the formation of ions in chemical reactions is correct?
539
517
587
Which row describes the formation of single covalent bonds in methane? [Table_1]
573
547
578
Which statement explains why graphite is used as a lubricant?
555
593
548
The compound magnesium nitrate has the formula $\text{Mg(NO}_3\text{)}_2$.
What is the relative formula mass of magnesium nitrate?
523
552
548
Samples of dilute sulfuric acid and concentrated hydrochloric acid are separately electrolysed. Which row describes the product at each electrode during the electrolysis of both substances? [Table_1]
526
585
565
Which row describes the energy level diagram and energy change in an exothermic reaction? [Table_1]
557
561
555
Which process is a physical change?
593
584
508
An experiment is set up as shown.
The mass of the conical flask and its contents is measured at 30 second intervals.
Which statement about the reaction and about changes to the reaction conditions is correct?
586
504
505
When blue-green crystals of nickel(II) sulfate are heated, water is produced and a yellow solid remains. When water is added to the yellow solid, the blue-green colour returns.
Which process describes these changes?
595
513
562
Different types of reaction are listed.
1. oxidation
2. decomposition
3. combustion
4. reduction
The equation shows the reaction of magnesium with oxygen.
$2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}$
Which types of reaction does magnesium undergo in this reaction?
554
557
549
Which colours are seen when litmus and methyl orange are added to separate samples of aqueous sodium hydroxide? [Table_1]
522
598
546
The positions of elements W, X, Y and Z in the Periodic Table are shown.
Which elements form basic oxides?
529
555
524
An acid is neutralised by adding an excess of an insoluble solid base.
A soluble salt is formed.
How is the pure salt obtained from the reaction mixture?
584
552
570
A substance is tested with three different reagents. Which row shows the results obtained with aqueous iron(II) nitrate?
[Table_1]
512
587
550
Part of the Periodic Table is shown.
Which row describes the properties of X, Y and Z?
| good conductor of electricity | high melting point |
|:----------------------------:|:------------------:|
| A. X | Z |
| B. Y | Z and X |
| C. Y and Z | Z |
| D. Z and X | X |
527
549
570
The melting points and boiling points of the elements of Group I of the Periodic Table are shown.
[Table_1]
Which pair of elements are liquid at 800 \(^{\circ}\)C?
507
585
582
The table gives some information about four metals, Q, R, S and T.
[Table_1]
Which statements are correct?
1. T forms a coloured sulfate.
2. Q and S are transition elements.
3. The density of R is 0.53 g/cm³.
4. R shows catalytic activity.
512
523
518
The electronic structures of helium, neon, and argon are shown.
Which row describes these gases?
[Table_1]
578
553
585
The diagrams show the structure of two substances used to make electrical conductors.
Which statement correctly describes X and Y?
515
571
507
Three different metals are reacted separately with dilute hydrochloric acid and with water. The results are shown.
[Table_1]
What is the order of reactivity of the metals starting with the most reactive?
550
546
599
Iron is extracted from its ore in a blast furnace. Hematite, coke, limestone and hot air are added to the furnace. Which explanation is not correct?
546
531
552
Which property of aluminium makes it useful in the manufacture of aircraft?
523
577
527
Water can be treated by filtration then chlorination.
Which uses do not need water of this quality?
1. water for cooling in industry
2. water for washing clothes
3. water for drinking
551
571
557
The following gases pollute the atmosphere.
1. sulfur dioxide
2. oxides of nitrogen
3. carbon monoxide
Which gases contribute to acid rain?
509
557
532
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?
503
512
511
Ammonia gas is produced when compound X is warmed with an ammonium salt. What is X?
590
583
597
Which statement describes a disadvantage of sulfur dioxide?
529
544
506
The diagram represents a lime kiln used to heat limestone to a very high temperature.
What leaves the kiln at X?
583
542
531
A hydrocarbon W burns to form carbon dioxide and water. W decolourises bromine water. What is the name of W and what is its structure? [Table_1]
533
549
524
Which statement about homologous series is not correct?
572
583
502
Which statements about ethanol are correct?
1. It can be made by fermentation.
2. It is an unsaturated compound.
3. It burns in air and can be used as a fuel.
572
502
575
What are the properties of aqueous ethanoic acid?
[Table_1]
528
536
590
Which polymers are found in foods?
1. carbohydrates
2. poly(ethene)
3. protein
4. Terylene
557
582
537
