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Chemistry JAMB Past Questions

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861
Which of these metals CANNOT replace hydrogen from alkaline solutions?
  • A. Alulinium
  • B. Zinc
  • C. Tin
  • D. Iron
View Answer & Discuss (12) JAMB 1994
862
Clothes should be properly rinsed with water after bleaching because?
  • A. the bleach decolourizes the cothes
  • B. chlorine reacts with fabrics during bleaching
  • C. the clothes are sterilized during bleaching
  • D. hydrogen chloride solution is produced during bleaching
View Answer & Discuss (3) JAMB 1994
863

Which of these solutions will give a white precipitate with a solution of barium chloride acidified with hydrochloric acid?

  • A. Sodium trioxocarbonate (IV)
  • B. Sodium tetraoxosulphate (IV)
  • C. Sodium trioxosulphate (IV)
  • D. Sodium sulphide
View Answer & Discuss (6) JAMB 1994
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864
SO3 is NOT directly dissolved in water in the preparation of H2SO4 by the contact process because?
  • A. the reaction between SO3 and water is violently exothermic
  • B. acid is usually added to water and never water to acid
  • C. SO3 does not dissolve in water readily
  • D. SO3 is an acid gas
View Answer & Discuss (4) JAMB 1994
865

In an electrolytic set-up to protect iron from corrosion, the iron is?

  • A. made cathode
  • B. made anode
  • C. used with a metal of lower electropositive potential
  • D. initially coated with tin
View Answer & Discuss (14) JAMB 1994
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