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Chemistry 1979 JAMB Past Questions

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21
0.1 Faraday of electricity was passed through a solution of copper (ll) sulphate. The maximum weight of copper deposited on the cathode would be [Cu = 64]
  • A. 64.0g
  • B. 32.0g
  • C. 16.0g
  • D. 6.4 g
  • E. 3.2g
View Answer & Discuss (8) JAMB 1979
22

Which one of these compounds will NOT give an oxygen gas on heating?

  • A. Manganese dioxide
  • B. Hydrogen peroxide
  • C. Zinc nitrate
  • D. Sodium nitrate
  • E. Ammonium nitrate
View Answer & Discuss (13) JAMB 1979
23
In the extraction of aluminum from purified bauxite by electrolysis, cryolite is used because
  • A. it makes bauxite a better conductor of electricity
  • B. it makes bauxite melt at a lower temperature
  • C. it makes aluminium purer
  • D. it prevents aluminium from getting oxidized
  • E. it protects the carbon electrodes used in the process
View Answer & Discuss (12) JAMB 1979
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24

In the redox reaction\( 2Fe^{2+} + CI_2 → 2Fe^{3+} + 2Cl^-\)

  • A. Cl2 is reduced because it has lost electrons
  • B. Cl2 is reduced because its oxidation number has decreased
  • C. Cl2 is reduced because its molecule is change to two ions
  • D. Fe2+ is reduced because it has lost electrons
  • E. Fe2+ is reduced because it has gained electrons
View Answer & Discuss (8) JAMB 1979
25

An anhydride is?

  • A. a compound wich has no water of crystallization
  • B. an oxide whose solution in water has a PH greater than 7
  • C. an oxide whose solution in water has a PH less than 7
  • D. an oxide that has hydrogen atoms
  • E. an amphoteric oxide
View Answer & Discuss (23) JAMB 1979
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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