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SingaporeChemistryQuick questions
Inorganic Chemistry
Quick questions on Sulfur and its compounds: Singapore A-Level H2 Chemistry
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is formation of sulfur dioxide?Show answer
Fossil fuels contain sulfur impurities. When they burn, the sulfur is oxidised:
What is sulfur dioxide as a preservative?Show answer
Sulfur dioxide and sulfites are used to preserve foods and wine because they inhibit the growth of bacteria and moulds and act as antioxidants, preventing browning. Their use is regulated because some people are sensitive to sulfites.
What are controlling sulfur emissions?Show answer
Flue-gas desulfurisation removes from power-station emissions by passing the flue gases through a spray or slurry of a base, usually calcium oxide or calcium carbonate:
What is q1?Show answer
Write the equation for the key equilibrium step of the Contact process and name the catalyst. [2 marks]
What is q2?Show answer
Explain why sulfur dioxide is added to some foods and drinks. [2 marks]
What is q3?Show answer
Write the equation for the removal of sulfur dioxide by calcium oxide in flue-gas desulfurisation. [1 mark]
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