The major raw material in a plastic industry is

A. ethanol

B. sulphur

C. methylethanoate

D. ethene

E. ethane

Which of the following reactions represents the laboratory preparation of hydrogen?

A. C_(s) + H ₂ O_(l) → CO_(g) + H_2(g)

B. 2Na_(s) + 2H₂O_(l) → 2NaOH_(aq) + H_2(g)

C. Zn_{(s) + 2HCI(aq) → ZnCI2(aq) + H2(g)}

D. Cu_(s) + H₂O_(l) → CuO_(s) + H_2(g)

E. 2AI_(s) + 3H₂O_{(l) → Al2O3(s) + 3H2(g)}

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

120cm³ of hydrogen were sparked with 60cm ³ of oxygen at 110^oC. What was the volume of stream produced? The equation for the reaction is 2H_2(g) + O_2(g) → 2H₂O_(g)

A. 30cm₃

B. 60cm₃

C. 90cm₃

D. 120cm₃

E. 180cm₃

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

Which of the following hydrocarbons is not likely to be present in petrol?

A. C₁₄H₃₀

B. C₁₀H₂₂

C. C₉H₂₀

D. C₇H₁₆

E. C₅H₁₂

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