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WAEC offline past questions - with all answers and explanations in one app - Download for free
76
What properties of duralumin make it more useful than its constituent metals?
  • A. It is heavy with a high melting point
  • B. It is malleable and has high density
  • C. It is strong and light
  • D. It is hard and ductile
View Answer & Discuss (5) JAMB 1999
77
The pair of metals in the reactivity series that are usually extracted by the electrolysis of their ores is
  • A. magnesium and zinc
  • B. magnesium and calcium
  • C. copper and zinc
  • D. lead and calcium
View Answer & Discuss (8) JAMB 1999
78
A metal that can be extracted from cassitertite is
  • A. cacium
  • B. magnesium
  • C. tin
  • D. copper
View Answer & Discuss (2) JAMB 1999
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
79
Which of the following metals is passive to concentrated trioxonitrate (V) acid?
  • A. Iron
  • B. Tin
  • C. Copper
  • D. Zinc
View Answer & Discuss (9) JAMB 1999
80
The hydrocarbon that burns in air with a sooty flames is
  • A. C2H6
  • B. C3H8
  • C. C4H10
  • D. C6H6
View Answer & Discuss (4) JAMB 1999
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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208