IGCSE chemistry 2 2022 Leave a Comment / By Admin / November 15, 2024 Welcome to your IGCSE chemistry 2 2022 1. Question 1 Which gas has the fastest rate of diffusion? H2 CO2 SO2 CH4 None 2. Question 2 In which state does 1 dm3 of methane contain the most particles? gas at room temperature gas at 100 D solid liquid None 3. Question 3 Which statement explains why isotopes of the same element have the same chemical properties? They have the same electronic structure They have the same proton number They have the same relative mass They have the same nucleon number None 4. Question 4 The electronic structures of atoms P and Q are shown.P and Q form an ionic compound. What is the formula of the compound? PQ P2Q P2Q3 PQ2 None 5. Question 5 Fermentation of sugar produces a mixture of ethanol solution and solid yeast. How is the solid yeast removed from the mixture? filtration crystallisation distillation fractional distillation None 6. Question 6 Which row explains why copper is a good conductor of electricity at room temperature? B D A C None 7. Question 7 Which pair of statements about diamond and graphite is correct? Diamond and graphite are both pure carbon. They are both macromolecules Diamond and graphite can both be used as electrodes. Graphite is also used as a lubricant Diamond is hard with a high melting point. Graphite is soft with a low melting point Diamond has covalent bonds. Graphite has ionic bonds None 8. Question 8 Sodium nitride contains the nitride ion, N3–. Sodium nitride is unstable and decomposes into its elements.What is the equation for the decomposition of sodium nitride? D B A C None 9. Question 9 Compound X contains carbon, hydrogen and oxygen only. By mass, it contains 26.7% carbon and 2.2% hydrogen. What is the empirical formula of X? C2HO CHO2 CHO CH2O None 10. Question 10 Caesium fluoride is an ionic compound. Which statements about caesium fluoride are correct? It is soluble in water It has a high melting point It is highly volatile It conducts electricity when solid None 11. Question 11 Which diagram shows the direction of movement of ions and electrons during the electrolysis of molten sodium chloride? B C A D None 12. Question 12 Calcium carbonate, CaCO3, reacts with dilute hydrochloric acid to produce carbon dioxide. The equation for the reaction is shown. The relative formula mass of calcium carbonate is 100.10 g of calcium carbonate is reacted with an excess of dilute hydrochloric acid. Which mass of carbon dioxide is produced? 2.8 g 2.2 g 4.4 g 44 g None 13. Question 13 Molten sodium chloride and concentrated aqueous sodium chloride are electrolysed using platinum electrodes. What are the products at the negative electrode (cathode) in each electrolysis? B D A C None 14. Question 14 An object is electroplated with silver using an aqueous silver salt as the electrolyte. Which row is correct? C B D A None 15. Question 15 Which row describes the changes that occur in an endothermic reaction? B A C D None 16. Question 16 Which statement about fuels is correct? Hydrogen is used as a fuel although it is difficult to store Heat energy is only produced by burning fuels Methane is a good fuel because it produces only water when burned Uranium is burned in air to produce energy None 17. Question 17 Which statement about endothermic and exothermic reactions is correct? In an exothermic reaction, the reactants are higher on an energy level diagram than the products In an endothermic reaction, the activation energy is always higher than in an exothermic reaction In an exothermic reaction, more energy is absorbed in bond breaking than is released in bond forming In an endothermic reaction, less energy is absorbed in bond breaking than is released in bond forming None 18. Question 18 The reaction used to manufacture ammonia from nitrogen and hydrogen is reversible. An equilibrium is established between ammonia, nitrogen and hydrogen. Which statement describes the equilibrium? The rate of the backward reaction is greater than the rate of the forward reaction Both the forward reaction and the backward reaction have the same rate The forward and backward reactions have both stopped The rate of the forward reaction is greater than the rate of the backward reaction None 19. Question 19 How does increasing the concentration affect the reacting particles in a chemical reaction? B C D A None 20. Question 20 Methyl orange is added to dilute hydrochloric acid and to aqueous sodium hydroxide. What is the colour of the methyl orange in each solution? C A D B None 21. Question 21 Zinc oxide is an amphoteric oxide. Which types of substances will react with zinc oxide? bases only neither acids nor bases acids only acids and bases None 22. Question 22 Information about some silver compounds is shown. Which equation shows a reaction which cannot be used to make a silver salt? B C A D None 23. Question 23 Aqueous ethanoic acid is a weak acid. Aqueous sodium hydroxide is a strong base. Aqueous ethanoic acid is neutralised by aqueous sodium hydroxide. Which statements are correct?1 Aqueous ethanoic acid accepts protons from hydroxide ions.2 The aqueous ethanoic acid used is fully dissociated into ions.3 The aqueous sodium hydroxide used is fully dissociated into ions.4 The reaction produces a salt and water. 3 and 4 1 and 3 1 and 2 2 and 4 None 24. Question 24 Three properties of element X are listed. .It contains atoms with a full outer shell of electrons..It is monoatomic..It is unreactive.In which part of the Periodic Table is the element placed? Group I Group VIII transition elements Group VII None 25. Question 25 Which word equation represents a reaction that occurs? B C A D None 26. Question 26 Which statement about the extraction of aluminium is correct? Hematite is mainly aluminium oxide Molten cryolite is used to raise the melting point of the aluminium oxide Aluminium is formed at the cathode during the electrolysis of aluminium oxide Oxygen gains electrons at the anode during the electrolysis of aluminium oxide None 27. Question 27 Metal M is mixed with copper to produce brass. What is M? vanadium chromium nickel zinc None 28. Question 28 The table gives some properties of an elementWhich other property does this element have? forms an acidic oxide A acts as a catalyst brittle highly reactive with water None 29. Question 29 Ammonia is produced using the Haber process. Which row shows the source of the raw materials and the reaction conditions? C A B D None 30. Question 30 How many species are acting as bases in this reversible reaction? 3 2 0 1 None 31. Question 31 The equation for a reaction occurring in the Contact process is shown.What is the catalyst used in this reaction? phosphoric(V) acid iron sulfuric acid vanadium(V) oxide None 32. Question 32 Which information about carbon dioxide and methane is correct? B C A D None 33. Question 33 The structure of an ester is shown.What are the names of the carboxylic acid and the alcohol that react together to form this ester? A C B D None 34. Question 34 Which statements about lime are correct?1 Lime is made by heating calcium carbonate (limestone).2 Lime is used to desulfurise flue gases.3 Lime is used to treat alkaline soil.4 The chemical name for lime is calcium oxide. 1, 2 and 4 3 and 4 1 and 3 1 and 4 only None 35. Question 35 Which structure is correctly named? B A C D None 36. Question 36 The structure of part of a polymer is shownWhich monomers can be used to make this polymer? 2 and 3 1 and 2 3 and 4 1 and 4 None 37. Question 37 Carboxylic acids are made by the oxidation of alcohols. Which carboxylic acid is produced from CH3CH2OH? propanoic acid butanoic acid methanoic acid ethanoic acid None 38. Question 38 Propene, C3H6, reacts with bromine, Br2, in an addition reaction. Which structure represents the product of this reaction? A B C D None 39. Question 39 Which statements about ethanol are correct?1 Ethanol is used as a solvent.2 Ethanol can be made directly from ethane.3 Ethanol is a covalent compound. 1 only 1 and 2 C 1 and 3 2 and 3 None 40. Question 40 Which diagram represents the structure of nylon? A C B D None Time's upTime is Up!
