Chemistry Past Questions

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21
Brass and bronze are both metallic alloys. Which of the following constituents is common to both alloys?
  • A. Tin
  • B. Zinc
  • C. Copper
  • D. Lead
  • E. Aluminium
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22
Which of the following gases may not be dried with concentrated sulphuric acid?
  • A. HCl
  • B. N2
  • C. Cl2
  • D. SO2
  • E. NH3
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23
Which of the following reactions does not take place in the smelting of iron in a blast furnace?
  • A. CaCO3(s) CaO(s) + CO2(g)
  • B. C(s) + O2(g) CO2(g)
  • C. 3FeCO(s) + 2OCO2(g) FeO4(s)
  • D. SiO2(s) + CaO(s) CaCO3(s)
  • E. CO2(g) + C(s) 2CO(g)
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24
Which of the following is not a member of the homologous series of the paraffins (alkanes)?
  • A. C3H8
  • B. C5H12
  • C. C7H16
  • D. C15H32
  • E. C24H48
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25
When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called
  • A. ionic bond
  • B. electrovalent bond
  • C. covalent bond
  • D. co-ordinate bond
  • E. hydrogen bond
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