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981
The metal that will react with water only in the form of steam to librate hydrogen gas is?
  • A. calcium
  • B. aluminium
  • C. iron
  • D. zinc
View Answer & Discuss (17) JAMB 1998
982
A common characteristic shared by iron and aluminium is that both?
  • A. are extracted by reduction methods
  • B. form only basic oxides
  • C. show oxidation states of +2 and +3
  • D. form soluble hydroxides
View Answer & Discuss (15) JAMB 1998
983
Alloys are often used in preference to pure metals because?
  • A. metals are too hard
  • B. merals are ductile
  • C. metallic properties are improve in alloys
  • D. alloys are a mixture of metals
View Answer & Discuss (2) JAMB 1998
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984
One mole of hydrocarbon contains 6g of hydrogen. If the molecular weight is 54, the hydrocarbon is an?
  • A. alkanone
  • B. alkane
  • C. alkene
  • D. alkyne
View Answer & Discuss (7) JAMB 1998
985
On cracking medicinal paraffin, a gas is evolved which gives a pop sound with a lighted splinter and an oily liquid which decolourizes bromine solution is also obtained. The products of the cracking are ?
  • A. carbon (IV) oxide and alkyne
  • B. carbon (ll) oxide and alkene
  • C. hydrogen gas and alkene
  • D. hydrogen gas and alkane
View Answer & Discuss (2) JAMB 1998
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