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Chemistry 1998 JAMB Past Questions

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11
The property used in obtaining oxygen and nitrogen industrially from air is the?
  • A. boiling point
  • B. density
  • C. rate of diffusion
  • D. solubility
View Answer & Discuss (1) JAMB 1998
12

Potassium tetraoxomanganate (VII) is often added to impure water to?

  • A. reduce organic impurities
  • B. reduce inorganic impurities
  • C. destroy bacteria and algae
  • D. remove permanent hardness
View Answer & Discuss (3) JAMB 1998
13
The soil around a battery manufacturing factory is likely to contain a high concentration of?
  • A. Ca2+ salts
  • B. Pb2+ salts
  • C. Mg2+ salts
  • D. Al3+ salts
View Answer & Discuss (2) JAMB 1998
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14

Excess phosphorus was burnt in a gas jar and the residual gas passed successively over concentrated KOH solution and concentration H2SO4 before being collected in a flask. The gases collected are?

  • A. carbon (IV) oxide, nitrogen and the rare gases
  • B. nitrogen and the rare gases
  • C. carbon (IV) oxide, nitrogen (IV) oxide and the rare gases
  • D. carbon (IV) oxide
View Answer & Discuss (6) JAMB 1998
15
If an element X of an atomic number Z and mass number Y is irradiated by an intense concentration of neutrons, the relevant nuclear equation is?
  • A. yzX + 10n → y - 1z + 1X
  • B. yzX + 10n → y + 1zX
  • C. yzX + 10n → yz + 1X
  • D. yzX + 10n → y + 1z - 1X
View Answer & Discuss (6) JAMB 1998
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