IGCSE chemistry 2 2022 Leave a Comment / By Admin / November 15, 2024 Welcome to your IGCSE chemistry 2 2022 Question 1 Which gas has the fastest rate of diffusion? H2 CH4 SO2 CO2 None Question 2 In which state does 1 dm3 of methane contain the most particles? gas at room temperature liquid D solid gas at 100 None Question 3 Which statement explains why isotopes of the same element have the same chemical properties? They have the same relative mass They have the same proton number They have the same nucleon number They have the same electronic structure None 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 PQ2 P2Q3 None Question 5 Fermentation of sugar produces a mixture of ethanol solution and solid yeast. How is the solid yeast removed from the mixture? crystallisation fractional distillation distillation filtration None Question 6 Which row explains why copper is a good conductor of electricity at room temperature? C D B A None Question 7 Which pair of statements about diamond and graphite is correct? Diamond is hard with a high melting point. Graphite is soft with a low melting point Diamond has covalent bonds. Graphite has ionic bonds 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 None 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? C D B A None 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? CH2O CHO2 CHO C2HO None Question 10 Caesium fluoride is an ionic compound. Which statements about caesium fluoride are correct? It is soluble in water It is highly volatile It conducts electricity when solid It has a high melting point None Question 11 Which diagram shows the direction of movement of ions and electrons during the electrolysis of molten sodium chloride? D C A B None 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 44 g 4.4 g None 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? A B C D None Question 14 An object is electroplated with silver using an aqueous silver salt as the electrolyte. Which row is correct? D B C A None Question 15 Which row describes the changes that occur in an endothermic reaction? A D C B None Question 16 Which statement about fuels is correct? Hydrogen is used as a fuel although it is difficult to store Uranium is burned in air to produce energy Methane is a good fuel because it produces only water when burned Heat energy is only produced by burning fuels None 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 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? Both the forward reaction and the backward reaction have the same rate The forward and backward reactions have both stopped The rate of the backward reaction is greater than the rate of the forward reaction The rate of the forward reaction is greater than the rate of the backward reaction None Question 19 How does increasing the concentration affect the reacting particles in a chemical reaction? C A D B None 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? B C A D None Question 21 Zinc oxide is an amphoteric oxide. Which types of substances will react with zinc oxide? acids only bases only acids and bases neither acids nor bases None Question 22 Information about some silver compounds is shown. Which equation shows a reaction which cannot be used to make a silver salt? C D B A None 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 2 1 and 3 2 and 4 None 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 transition elements Group VIII Group VII None Question 25 Which word equation represents a reaction that occurs? C A B D None Question 26 Which statement about the extraction of aluminium is correct? 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 Hematite is mainly aluminium oxide Oxygen gains electrons at the anode during the electrolysis of aluminium oxide None Question 27 Metal M is mixed with copper to produce brass. What is M? vanadium zinc nickel chromium None Question 28 The table gives some properties of an elementWhich other property does this element have? brittle highly reactive with water A acts as a catalyst forms an acidic oxide None Question 29 Ammonia is produced using the Haber process. Which row shows the source of the raw materials and the reaction conditions? D B A C None Question 30 How many species are acting as bases in this reversible reaction? 2 0 3 1 None 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 Question 32 Which information about carbon dioxide and methane is correct? D B C A None 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? B A C D None 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 and 4 only 3 and 4 1, 2 and 4 1 and 3 None Question 35 Which structure is correctly named? A C D B None 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 1 and 4 3 and 4 None Question 37 Carboxylic acids are made by the oxidation of alcohols. Which carboxylic acid is produced from CH3CH2OH? butanoic acid ethanoic acid methanoic acid propanoic acid None Question 38 Propene, C3H6, reacts with bromine, Br2, in an addition reaction. Which structure represents the product of this reaction? D A C B None 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. C 1 and 3 1 and 2 1 only 2 and 3 None Question 40 Which diagram represents the structure of nylon? A B D C None Time's upTime is Up!
