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Chemistry JAMB Past Questions

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1321
Which of the following statements is true? When the potassium atom forms its ion
  • A. it gains one electron and becomes neutral
  • B. its atomic number decreases
  • C. it achieves electronic configuration of orgon
  • D. it loses one proton
  • E. it loses one neutron
View Answer & Discuss (10) JAMB 1979
1322
Which of the following contains two amphoteric oxides?
  • A. sodium oxide, Zinc oxide , Magnesium oxide
  • B. Aluminium oxide, Calcium oxide, Zinc oxide
  • C. Potassium oxide, Lithium oxide, Carbon monoxide
  • D. Silver oxide, Lead oxide, Sodium oxide
  • E. Sulphur dioxide, Aluminium oxide, Carbon monoxide
View Answer & Discuss (11) JAMB 1979
1323
Helium atoms are chemically unreactive because
  • A. there are no electrons around the nucleus
  • B. the number of protons equals the number of electrons
  • C. there are equal number of protons and neutrons in the nucleus
  • D. the outer electron shell is completely filled
  • E. the atoms contain only protons
View Answer & Discuss (5) JAMB 1979
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1324

\(50cm^{3}\) of hydrogen are sparked with \(20cm^{3}\) of oxygen at \(100°C\) and \(1atm\) . The total volume of the residual gases in

  • A. 50 cm3
  • B. 10 cm3
  • C. 40 cm3
  • D. 30 cm3
  • E. 70 cm3
View Answer & Discuss (14) JAMB 1979
1325

How many grams of HBr would exactly be required to react with 2 g of propyne? (C =12, H=1, Br = 80)

  • A. 4. 1 g
  • B. 6. 1 g
  • C. 8. 1g
  • D. 16.2g
View Answer & Discuss (10) JAMB 1979
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