43
The following are miscible with water except
- A. ethylethanoate
- B. methanol
- C. ethanoic acid
- D. methanoic acid
- E. ethanol
44
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
45
Which of the following hydrocarbons is not likely to be present in petrol?
- A. C14H30
- B. C10H22
- C. C9H20
- D. C7H16
- E. C5H12
46
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
47
120cm3 of hydrogen were sparked with 60cm 3 of oxygen at 110oC. 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
48
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 theoctane number of petrol
- D. in which carbon chain results in a zigzag arrangement
- E. in which aromatic hydrocarbons are produced
49
Which of the following reactions represents the laboratory preparation of hydrogen?
- A. C(s) + H 2 O(l) → CO(g) + H2(g)
- B. 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
- C. Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g)
- D. Cu(s) + H2O(l) → CuO(s) + H2(g)
- E. 2AI(s) + 3H2O(l) → Al2O3(s) + 3H2(g)
50
The major raw material in a plastic industry is
- A. ethanol
- B. sulphur
- C. methylethanoate
- D. ethene
- E. ethane