The most suitable method to use when separating an insoluble solid from a liquid is?
A. evaporation B. filtration C. magnetization D. sublimation E. distillation Correct Answer: Option B – filtration
The earthly impurities in iron ore are removed in the blast furnace by the reaction?
A. CO2 + C →2CO B. Fe2O3 + 3CO →2Fe + 3CO2 C. SiO2 + CaO →CaSiO3 D. CaCO3 → CaO + CO2 E. C +CO2 → CO2 Correct Answer: Option C – SiO2 + CaO →CaSiO3
120cm³ of hydrogen was sparked with 60cm³ of oxygen at 110°C. What was the volume of stream produced? The equation for the reaction is 2H2(g) + O2(g) → 2H2O(g)
A. 30cm³ B. 60cm³ C. 90cm³ D. 120cm³ E. 180cm³ Correct Answer: Option D – 120cm³
Which of the following statements best explains cracking? It is a process
A. in which an alkene adds on itself repeatedly to form long-chain polymers B. in which large hydrocarbon molecules are broken into smaller units C. for measuring the octane number of petrol D. in which carbon chain results in a zigzag arrangement E. in which aromatic...Products
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