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Chemistry JAMB Past Questions

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661

Which of the following statements is an exception in the assumptions of the kinetic theory of gases?

  • A. Gases are composed of many elastic particles
  • B. The particles are of negligible size
  • C. The particles are in constant random motion
  • D. The particles are of negligible mass
  • E. The particles collide with each other
View Answer & Discuss (28) JAMB 1980
662

Which of the following statements is true?

  • A. Metals conduct electricity while non-metals do not
  • B. Metals have high density, non-metals have low density
  • C. Metals form basic oxides, non-metals form acidic oxides
  • D. In the electro chemical series, metals are above hydrogen while non-metals are below hydrogen
  • E. Metals lose elections while non-metals gain electron during chemical reactions
View Answer & Discuss (43) JAMB 1980
663
Which of the following is a physical change?
  • A. The bubbling of chlorine into water
  • B. The bubbling of chlorine into a jar contanining hydrogen
  • C. The dissolution of sodium chloride in water
  • D. The passing of steam over heated iron
View Answer & Discuss (6) JAMB 1990
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664

In a reaction: \(SnO_{2} + 2C → Sn + 2CO\) the mass of coke containing 80% carbon required to reduce 0.302 kg of pure tin oxide is?
(Sn - 119, O - 16, C - 12).

  • A. 0.40 kg
  • B. 0.20 kg
  • C. 0.06 kg
  • D. 0.04 kg
View Answer & Discuss (22) JAMB 1990
665

Cr\(_2\)O\(_7\)\(^{2-}\) + 6Fe\(^{2+}\) + 14H\(^+\) → 2Cr\(^{3+}\) +6Fe\(^{3+}\) + 7H\(_2\)O. In the above , the oxidation number of chromium changed from?

  • A. +7 to +3
  • B. +6 to +3
  • C. +5 to +3
  • D. -2 to +3
View Answer & Discuss (18) JAMB 1990
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