No questions found
Which row describes the arrangement and motion of the particles in a liquid?[Table_1]
531
514
591
Which gas has the lowest rate of diffusion at room temperature and pressure?
510
556
586
Which diagram represents one helium atom?
529
576
527
The diagram shows part of an ionic lattice structure. Which compound does the diagram represent?
522
545
540
Which statement about nitrogen molecules and ethene molecules is correct?
546
557
543
Sulfur is a simple molecule with the formula $S_8$. Which row describes and explains the melting point of sulfur? [Table_1]
595
523
544
Which row identifies a property and an explanation of the property for both diamond and silicon(IV) oxide?
[Table_1]
588
541
570
Which statement about the structure of metals explains why metals are malleable?
541
590
592
What is the formula of iron(III) oxide?
591
557
527
Calcium carbonate is heated. Calcium oxide and carbon dioxide gas are formed. The equation for the reaction is shown. $$\text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2$$ 225 kg of calcium carbonate is heated until there is no further change in mass. The yield of calcium oxide is 85 kg. What is the percentage yield?
570
540
556
The apparatus used for electrolysis is shown.
Which statement is correct?
591
538
503
Which statement about the electrolysis of aqueous copper(II) sulfate is correct?
555
533
576
Which statement describes an advantage of using a hydrogen–oxygen fuel cell in a car compared to a gasoline engine?
591
536
555
Two reaction pathway diagrams are shown. Which arrow represents the activation energy for a reaction which releases thermal energy?
513
600
536
Which statements about the Haber process are correct? \n 1. A high temperature is used because the reaction is slow at room temperature. \n 2. A high pressure is used because there are more moles of gaseous reactants than moles of gaseous product. \n 3. A nickel catalyst is used to increase the rate of reaction. \n 4. An iron catalyst is used to increase the equilibrium yield of ammonia.
550
539
598
Which substance is a raw material used to manufacture sulfuric acid?
600
547
541
Which colours are seen when litmus and methyl orange are added to separate samples of aqueous sodium hydroxide? [Table_1]
527
512
519
Information about the solubility in water of four oxides is shown. Which oxide, when added to water, gives a solution with a pH less than pH 7? [Table_1]
568
522
526
Copper(II) sulfate is made when copper(II) carbonate reacts with dilute sulfuric acid.$$\text{CuCO}_3 + \text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{H}_2\text{O} + \text{CO}_2$$ Pure copper(II) sulfate crystals are obtained. Which reagent is in excess and how are the crystals obtained? [Table_1]
569
503
526
Which statement about elements in Group I or Group VII of the Periodic Table is correct?
505
516
501
Some information about an element from Group VII of the Periodic Table is shown. [Table_1] What is the element?
576
577
575
Manganese(IV) oxide, MnO\(_2\), is a black solid.
The equation for the reaction between manganese(IV) oxide and dilute hydrochloric acid is shown.
MnO\(_2\) + 4HCl \(\rightarrow\) MnCl\(_2\) + 2H\(_2\)O + Cl\(_2\)
The reaction produces a pale pink solution.
Which properties of transition elements does this reaction show?
1. They can act as catalysts.
2. They form coloured compounds.
3. They have high melting points.
4. They have variable oxidation numbers.
592
511
527
Part of a steel ship is protected from rusting using a sacrificial metal. What is a suitable sacrificial metal?
564
577
570
Which row gives a use for the named metal and two properties which both explain this use? [Table_1]
520
520
516
The apparatus used for the extraction of aluminium by electrolysis is shown. Which equation represents the reaction at the anode?
543
525
589
Which gas is both an element and present in clean, dry air?
581
574
556
Oxides of nitrogen formed in a car's engine are removed using a catalytic converter.
What happens to the oxides of nitrogen in the catalytic converter?
593
507
540
What is the equation for photosynthesis?
577
580
581
Four statements about members of the same homologous series are listed.
1. They have the same volatility.
2. They have the same molecular formula.
3. They have the same functional group.
4. They have the same general formula.
Which statements are correct?
547
575
576
Ethene reacts with steam to produce ethanol. Which row describes each compound? [Table_1]
521
531
516
Which process is used to make an alkene from a long-chain alkane?
534
592
512
Which fraction obtained from petroleum has the lowest boiling point?
541
550
519
Alkanes undergo substitution reactions with chlorine in the presence of ultraviolet light. Which equation shows a reaction of this type?
577
580
523
Information about two reactions of ethene is listed.
• Reaction 1 requires a nickel catalyst.
• Reaction 2 requires an acid catalyst.
Which substance reacts with ethene in each reaction?
[Table_1]
545
569
549
Which process converts CH$_3$CH$_2$OH to CH$_3$COOH?
560
563
500
The structure of an ester is shown.
Which row identifies the name of the ester and the two compounds from which it is made?
592
566
526
Which statements about monomers or polymers are correct?
1. Monomers are \textbf{always} joined together by addition reactions.
2. A polymer can be formed from a single type of monomer.
3. A polymer can be formed by joining two different types of monomer.
4. Water is \textbf{always} produced when monomer molecules join together.
570
522
600
The diagram shows the structure of a naturally occurring polymer, Q.
What is Q?
586
574
572
Which row shows how the boiling point and the melting point of water change when a soluble impurity is added to the water? [Table_1]
584
503
596
X is a white powder. The following tests are done on X. \n\n \bullet When a few drops of aqueous sodium hydroxide are added to a solution of X, no precipitate is seen. \n \bullet When X is heated with aqueous sodium hydroxide, no gas is formed. \n \bullet X gives a lilac colour when put into a flame. \n \bullet When acidified aqueous silver nitrate is added to a solution of X, a yellow precipitate is seen. \n\n What is X?
589
528
512
