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Chemistry Past Questions

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1181
The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as?
  • A. Brownian movement
  • B. condensation
  • C. evaporation
  • D. liquefaction
View Answer & Discuss (5) JAMB 1986
1182

What mass of a divalent metal M (atomic mass = 40) would react with excess hydrochloric acid to liberate 224cm^3 dry hydrogen gas measured at S.T.P?

  • A. 8.0 g
  • B. 4.0 g
  • C. 0.8 g
  • D. 0.4 g
View Answer & Discuss (34) JAMB 1986
1183
The boiling point of water is higher than that of methanol because?
  • A. water is oxide while methanol is an alcohol
  • B. inter molecular forces in water are stronger than those in methanol
  • C. water is an inorganic compound while methanol is organic
  • D. water is an ionic compound while methanol is a covalent compound
  • E. water is more reactive than methanol
View Answer & Discuss (4) JAMB 1980
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1184

Chlorine, bromine and iodine resemble each other in that all?

  • A. dissolve in alkalis
  • B. react violently with hydrogen without heating
  • C. displace each other from solutions of their salts
  • D. are gases
  • E. are liquids
View Answer & Discuss (27) JAMB 1980
1185

Element X has a total of 19 electrons and can react with oxygen to form an oxide. Which of the following statements is NOT true of the oxide of the element?

  • A. When exposed to air, it slowy changes to liquid
  • B. its solution in water conducts electricity
  • C. Its solution in water, on evaporationm gives a white solid
  • D. Its solution in water liberates hydroge when in contact with aluminium metal
  • E. Its oxide, when stronlgy heated, regenerates the elements X
View Answer & Discuss (22) JAMB 1980
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