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The diagrams show particles in a container.
Which two diagrams show the process of evaporation?
580
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Which piece of apparatus is used to measure exactly 26.3 cm3 of a liquid?
515
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The melting points and boiling points of pure substances W, X and Y are shown.
[Table_1]
The substances are chlorine, ethanol and sulfur.
Which row identifies W, X and Y?
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570
In which atom is the number of protons equal to the number of neutrons?
588
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516
Which row identifies an alloy, a pure metal and a non-metal?
[Table_1]
544
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566
A covalent molecule Q contains exactly six shared electrons.
What is Q?
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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?
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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 12g of magnesium completely reacts with dilute sulfuric acid?
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589
What is observed at each electrode when molten lead(II) bromide is electrolysed using platinum electrodes?
[Table_1]
579
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585
Which gas is used as a fuel?
529
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509
Burning fuels is an exothermic reaction.
What is meant by the term \textit{exothermic}?
580
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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?
511
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Water is added to anhydrous copper(II) sulfate.
What happens during the reaction?
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521
Which equation shows an oxidation reaction?
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Dilute nitric acid is added to a solid, F. A gas, G, is produced which is denser than air and extinguishes a burning splint. What are F and G? [Table_1]
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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
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Two salt solutions, X and Y, are tested.
The table shows the results.
| test | X | Y |
|---|---|---|
| a few drops of aqueous sodium hydroxide are added | green precipitate formed | red-brown precipitate formed |
| a few drops of dilute nitric acid and a few drops of barium nitrate are added | no change seen | white precipitate formed |
| a few drops of dilute nitric acid and a few drops of silver nitrate are added | white precipitate formed | no change seen |
What are X and Y?
539
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523
Which element is in the same period of the Periodic Table as silicon?
579
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596
Which statement about the halogens is correct?
541
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561
Which row shows the catalytic activity of transition elements and their compounds? [Table_1] | | catalytic activity of transition elements | catalytic activity of compounds of transition elements | |----------------------|------------------------------------------|------------------------------------------------------| | A | good | good | | B | good | poor | | C | poor | good | | D | poor | poor |
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Which statement about the noble gases is not correct?
551
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The following statements are made about the metals copper, iron, magnesium and zinc.
1. Their oxides are acidic.
2. They all conduct electricity in the solid state.
3. They all have high melting points.
4. They all react with dilute acids to form hydrogen.
Which statements are correct?
536
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588
Three metals, X, Y and Z, were reacted with water. The oxides of the same three metals were also heated strongly with carbon.
The results are shown.
[Table_1]
What is a correct conclusion about X, Y and Z?
527
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548
In a blast furnace, iron ore is mixed with coke and limestone, and heated in hot air. Compound R is formed. Compound R then reduces the iron ore to iron. Which equation shows the formation of compound R?
592
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539
Which statement explains why aluminium is used in the manufacture of aircraft?
533
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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?
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529
A steel bicycle which had been left outdoors for several months was starting to rust.
What would not reduce the rate of corrosion?
530
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559
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.
589
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Farmers use fertilisers to replace minerals in the soil that have been removed by the crops they grow.
Which elements in the soil are replaced by adding fertilisers?
538
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570
Which statement is correct?
500
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523
Which statement about sulfur and its compounds is not correct?
587
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511
Which process is used to convert limestone (calcium carbonate) into lime?
578
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562
Lime is used to treat an industrial waste.
Which change occurs in the treatment?
[Table_1]
505
507
593
What is not the correct use of the fraction named?
[Table_1]
536
515
574
Four organic compounds are listed.
ethane
ethanoic acid
ethanol
ethene
Which bond do all four compounds contain?
538
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527
The first three members of a homologous series are shown.
Why do these molecules represent a homologous series?
505
564
547
Which substances can be obtained by cracking hydrocarbons?
568
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598
Polymers are long-chain molecules made from small molecules linked together.
Four polymers or types of polymer are listed.
1. carbohydrates
2. nylon
3. proteins
4. Terylene
Which of these polymers or types of polymer are synthetic?
568
532
572
