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Chemistry Past Questions

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1866
Zinc displaces copper from an aqueous solution of copper (ll) salt because
  • A. copper is a transition element
  • B. copper is a moderately reactive metal
  • C. Zinc and copper have reducing prperties
  • D. zinc is more reactive than copper
  • E. zinc reacts with both acids and alkalis
View Answer & Discuss (2) WAEC 1993
1867
The alloy used for metal work and plumbing contains
  • A. lead and tin
  • B. iron and carbon
  • C. copper and tin
  • D. aluminium and copper
  • E. lead and antimony
View Answer & Discuss (2) WAEC 1993
1868
The components of universal indicator solution can best be separated by
  • A. chromatography
  • B. filtration
  • C. evaporation
  • D. crystallization
  • E. fractional distillation
View Answer & Discuss (2) WAEC 1994
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1869
The number of replaceable hydrogen atoms in one acid indicates its
  • A. basicity
  • B. acidity
  • C. alkalinity
  • D. reactivity
  • E. pH value
View Answer & Discuss (3) WAEC 1994
1870

Catalytic hydrogenation of alkenes produces compounds with the general formula

  • A. CnH2n+1 OH
  • B. CnH2n+1
  • C. CnH2n+2
  • D. CnH2n-2
  • E. Cx(H2O)y
View Answer & Discuss (2) WAEC 1994
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