CAIE IGCSE Chemistry 6.3.8 Symbol Equation for the Conversion of Questions
Follow the Contact process, identify the vanadium(V) oxide catalyst step and write the reversible sulfur dioxide oxidation equation.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- write 2SO2 + O2 ⇌ 2SO3 with correct balancing and a reversible arrow
- identify the vanadium(V) oxide-catalysed step in the Contact process
- order the Contact-process stages from sulfur combustion through sulfuric acid formation
- link industrial sulfuric acid manufacture to the Contact process without confusing it with Haber
CAIE IGCSE Chemistry 6.3.8 Symbol Equation for the Conversion of Questions question 1
The flow chart shows part of the process for the manufacture of sulfuric acid and its electrolysis.
What are gases 1,2 and 3 ?
gas 1
gas 2
gas 3
sulfur dioxide
hydrogen
sulfur trioxide
sulfur dioxide
oxygen
sulfur trioxide
sulfur trioxide
hydrogen
sulfur dioxide
sulfur trioxide
oxygen
sulfur dioxide
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