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Chemistry Past Questions

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391

When a crystal was added to the clear solution of its salt, the crystal did not dissolve and the solution remained unchanged. This showed that the solution was

  • A. supersaturated
  • B. concentrated
  • C. unsaturated
  • D. saturated
View Answer & Discuss (16) JAMB 2006
392

A particle that contains 11 protons, 12 neutrons and 10 electrons is probably a

  • A. neutral non-metal
  • B. metallic ion
  • C. non-metallic ion
  • D. neutral metal
View Answer & Discuss (4) JAMB 2006
393

A difference between chemical and physical change is that in a chemical change

  • A. oxygen is consumed
  • B. heat is supplied
  • C. a reversible process oocurs
  • D. a new substance is formed
View Answer & Discuss (1) JAMB 2006
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394
The volume of 2.5 moles of oxygen at s.t.p is
[Molar volume of a gas at s.t.p = 22.4 dm3]
  • A. 50.0 dm3
  • B. 84.0 dm3
  • C. 28.0 dm3
  • D. 56.0 dm3
View Answer & Discuss (3) JAMB 2006
395

Nuclear fission involves the splitting of a heavy element into two nuclei of

  • A. nearly equal masses with a release of energy and radiation
  • B. equal masses with a release of energy
  • C. equal masses with a release of energy and radiation
  • D. unequal masses without any release of energy
View Answer & Discuss JAMB 2006
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