No questions found
Which conditions cause gas particles to move the fastest and the furthest apart? [Table_1]
510
539
599
Which statement describes a liquid at room temperature?
522
522
579
A compound, X, has a melting point of 71°C and a boiling point of 375°C. Which statement about X is correct?
547
561
587
What is the nucleon number of an atom?
517
501
563
An atom has three electron shells. There are three electrons in the outer shell. How many protons and how many neutrons are in this atom? [Table_1]
546
539
547
Which row gives the number of covalent bonds in one molecule of ammonia and in one molecule of hydrogen chloride? [Table_1]
552
573
519
Which statements about the structure and bonding in diamond are correct?
1. Each carbon atom in diamond is bonded to three other carbon atoms only.
2. Diamond contains many strong covalent bonds.
3. Diamond contains layers of carbon atoms, which can slide over each other.
4. Diamond has a giant structure.
532
542
561
Magnesium burns in oxygen to form magnesium oxide. The equation for the reaction is shown. $$2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}$$ Which mass of magnesium oxide is formed when 48 g of magnesium is burned?
567
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530
Propane, C_3H_8, is burned in a limited amount of oxygen. Which equation represents this reaction?
529
519
582
The isotope of which element is used to define the relative atomic mass of other elements?
526
514
521
What is the definition of electrolysis?
574
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554
Which statement about electroplating a copper spoon with silver is correct?
550
572
527
Which row describes the reaction pathway diagram and energy change in an exothermic reaction? [Table_1]
578
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595
The table shows the initial and final temperatures for four different reactions.\n\n[Table_1]\n\nWhich reactions are endothermic?
511
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549
Which process is a chemical change?
586
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596
A student reacts strips of zinc with dilute sulfuric acid and measures the time taken to produce 100 \textrm{cm}^3 of hydrogen.
The experiment is repeated using different conditions.
The results are shown in the table.
[Table_1]
Which changes in conditions produce the results shown in experiment 2?
1 Add a catalyst.
2 Dilute the acid.
3 Use zinc powder.
4 Heat the acid.
573
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599
When blue copper(II) sulfate is heated, a white solid and water are formed.
The white solid turns blue and gives out heat when water is added to it.
Which terms describe the blue copper(II) sulfate and the reactions?
[Table_1] The table categorizes if blue copper(II) sulfate is a mixture or hydrated and if the reaction can be reversed or cannot be reversed.
562
578
547
Which statements about a redox reaction are correct?
1. Oxidation is the gain of oxygen.
2. Both oxidation and reduction take place in a redox reaction.
3. Reduction is the gain of oxygen.
506
506
510
Which row identifies a basic oxide and describes an alkali?
[Table_1]
508
531
587
Which indicators turn blue when added to aqueous ammonia?
1. litmus
2. thymolphthalein
3. universal indicator
597
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550
Ammonium chloride reacts with solution X to produce alkaline gas Y. The equation is shown.
ammonium chloride + solution X \rightarrow alkaline gas Y
Which row identifies X and Y?
[Table_1]
520
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577
The solubility of some salts is shown. [Table_1] Which two aqueous solutions produce an insoluble salt when mixed together?
569
536
564
The table shows some properties of the halogens.
[Table_1]
Which statement describes astatine?
584
571
531
J, L and M are elements in the Periodic Table. \begin{itemize} \item J has the highest density. \item L has the highest reactivity with water. \item M has the highest atomic number. \end{itemize} Which row identifies the elements J, L and M? \[ \begin{array}{|c|c|c|c|} \hline & J & L & M \\ \hline \text{A} & \text{copper} & \text{lithium} & \text{bromine} \\ \text{B} & \text{lithium} & \text{copper} & \text{bromine} \\ \text{C} & \text{bromine} & \text{lithium} & \text{copper} \\ \text{D} & \text{copper} & \text{bromine} & \text{lithium} \\ \hline \end{array} \]
535
571
595
Which statement about elements in Group I of the Periodic Table is correct?
582
514
525
Which diagram shows a mixture of noble gases?
562
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539
Which statements about the alloy brass are correct? 1. It is harder than pure copper. 2. It does \textbf{not} conduct electricity. 3. It is a mixture of copper and nickel. 4. It is stronger than pure copper.
553
566
585
The bodies of aircraft are often made using aluminium. Which two properties of aluminium make it suitable for this use? [Table_1]
572
552
587
Four metals, P, Q, R and S, are added separately to water and to dilute hydrochloric acid. The table shows the results.
[Table_1]
Which conclusion can be made from these observations?
509
533
538
Iron is extracted from its ore in the blast furnace.
Which statement about one of the reactions in the blast furnace is correct?
561
534
543
Which pollutants found in river water lead to deoxygenation?\n1. nitrates\n2. harmful microbes\n3. metal compounds\n4. phosphates
528
592
515
Three effects of air pollutants are listed.
1. photochemical smog
2. respiratory problems
3. acid rain
Which effects are caused by oxides of nitrogen?
571
540
537
Fractional distillation is used to separate petroleum into its fractions.
Which statement about the fractional distillation of petroleum is correct?
539
527
530
Fertilisers are mixtures of different compounds used to increase the growth of crops. Which pair of substances contain the three essential elements for plant growth?
532
574
598
Which row gives the relative molecular mass, $M_r$, of the first member of the named homologous series? [Table_1]
556
566
567
A hydrocarbon decolourises bromine water. Which statement about the hydrocarbon is correct?
516
543
502
Which statement describes how ethanol is manufactured from ethene?
512
514
588
Ethanol acid reacts with aqueous sodium carbonate. Which gas is given off in this reaction?
563
581
533
A mixture containing an aqueous salt, sand and hot water is stirred.
The mixture is then poured into the apparatus shown.
What is X?
563
512
575
A scientist uses a titration to calculate the concentration of acid in a sample of lemon juice. A measured volume of aqueous lemon juice and a few drops of an indicator are added to a flask. The aqueous lemon juice is then titrated against 0.1 mol/dm^3 aqueous sodium hydroxide. Which piece of apparatus is used to add the aqueous sodium hydroxide to the flask?
554
573
572
