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Chemistry Past Questions

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931
Given that 15.00 cm3 of H2
SO4 was required to completely neutralize 25.00 cm3 of 0.125 mol dm-3 NaOH, calculate the molar concentration of the acid solution:
  • A. 0.925 mol dm-3
  • B. 0.156mol dm-3
  • C. 0.104 mol dm-3
  • D. 0.023 mol dm-3
View Answer & Discuss (5) JAMB 1997
932
When platinum electrodes are used during the electrolysis of copper (ll) tetraoxosulphate (lV) solution, the solution gets progressively?
  • A. acidic
  • B. basic
  • C. neutral
  • D. amphoteric
View Answer & Discuss (5) JAMB 1997
933
How many Faraday of electricity are required to deposit 0.20 mole of nickel, if 0.10 Faraday of electricity deposited 2.98g of nickel during electrolysis of its aqueous solution?

(Ni = 58.7, 1F = 96 500 C mol-)
  • A. 0.20
  • B. 0.30
  • C. 0.40
  • D. 0.50
View Answer & Discuss (10) JAMB 1997
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934
What is the oxidation number of Z in K3ZCl6?
  • A. -3
  • B. +3
  • C. -6
  • D. +6
View Answer & Discuss (3) JAMB 1997
935
2H2S(g) + SO2(g) + H2O(I) → 3S(s) + 3H2O(I)..........(i) 3CuO(s) + 2NH3(g) → 3Cu(s) + 3H2O(I) + N2(g).........(II) In the equations above, the oxidizing agent (I) and the reducing agent in (II) respectively are?
  • A. H2S and NH3
  • B. SO2 and CuO
  • C. SO2 and NH3
  • D. H2S and CuO
View Answer & Discuss (8) JAMB 1997
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