FORM 3 CHEMISTRY TEST ONLINE TEST SERIES CHLORINE AND SULPHUR 1. Carbon and chlorine form a chloride. What is the formula of this chloride? A. CCl2 B. CCl4 C. CaCl2 D. CaCl4 2. Which property would all the hydrogen compounds of the Group VII elements possess? A. be covalent B. be solids at room temperature C. form alkaline aqueous solutions D. conduct electricity when molten 3. Which equation represents the reaction between hydrochloric acid and sodium hydroxide? A. Cl – + Na+ → NaCl B. 2H+ + O2- → H2O C. 1/2O2 + H2 → H2O D. H+ + OH- → H2O 4. Naturally occurring bromine has a relative atomic mass of 80 and consists entirely of two isotopes of relative isotopic masses 79 and 81. What can be deduced about naturally-occurring bromine from this information only? A. Bromine isotopes have different numbers of protons. B. Bromine contains the two isotopes in equal proportions. C. Bromine has different oxidation states. D. Bromine is radioactive. 5. Every year millions of tonnes each of chlorine and sodium hydroxide are manufactured by the electrolysis of brine using a ‘diaphragm cell’. What is the purpose of the diaphragm in such a cell? A. to prevent chlorine gas escaping into the factory B. to prevent the build up of pressure in the electrolysis cell C. to provide a large surface area of electrode D. to stop the products of electrolysis from reacting together 6. Which statement describes the halogens chlorine, bromine and iodine? A. Their bond energies decrease with increasing proton number. B. Their first ionisation energies increase with increasing proton number. C. They are all coloured gases at room temperature. D. They are all good reducing agents. 7. Sulfur dioxide, SO2, is added to wines to prevent oxidation of ethanol by air. To determine the amount of SO2, a sample of wine is titrated with iodine, I2. In this reaction, one mole of SO2 is oxidised by one mole of I2. What is the change in oxidation number of sulfur in this reaction? A. +2 to +4 B. +2 to +6 C. +4 to +5 D. +4 to +6 8. Sulfur dioxide is used to bleach wood pulp in the production of paper. It is also used as an additive in the production of jam and marmalade, often in the form of sulfite compounds. When it is present in quantities greater than 10 mg / kg it is required to be listed as an ingredient of the jam. Why is sulfur dioxide added to jam? A. It is a bleaching agent and removes the undesirable colours from the fruit used in the jam. B. It is a preservative that destroys unwanted bacteria and enzymes. C. It is a reducing agent and removes the acids that give the jam a sharp taste. D. It is an acidic gas and maintains the pH of the jam at a suitable value to give it a sharp taste. 9. How does concentrated sulfuric acid behave when it reacts with sodium chloride? A. as an acid only B. as an acid and oxidising agent C. as an oxidising agent only D. as a reducing agent only 10. Which environmental problem is not made worse by the release of oxides of nitrogen from car engines? A. acidification of lakes B. corrosion of buildings C. photochemical smog D. the hole in the ozone layer Loading … Question 1 of 10
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