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Chemistry Past Questions

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1456

Which of the following salts will turn blue litmus red?

  • A. Sodium tetrahydroxozincate (ll)
  • B. Sodium hydrogentetraoxosulphate (VI)
  • C. Sodium trioxocarbonate (lV)
  • D. Zinc chloride hydroxide
View Answer & Discuss (3) JAMB 2014
1457
Zn (s) + CuSO 4(aq) → ZnSO 4(aq) + Cu (s)
In the reaction above, the oxidation number of the reducing agent changes from
  • A. 0 to + 4
  • B. 0 to + 2
  • C. + 1 to + 2
  • D. + 1 to + 3
View Answer & Discuss (3) JAMB 2014
1458

\(H_2O_{(g)} + C_{(s)} → H_{2(g)} + CO_{(g)}\)

The oxidizing agent in the reaction above is

  • A. CO(g)
  • B. C(s)
  • C. H2O(g)
  • D. H(2)(g)
View Answer & Discuss (4) JAMB 2014
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1459

Calculate the quantity of electricity in coulombs required to liberate 10g of copper from a copper compound

[Cu=64, F = 96500 Cmol-1]

  • A. 32395.5
  • B. 30156.3
  • C. 60784.5
  • D. 15196.5
View Answer & Discuss (4) JAMB 2014
1460
How many faraday of electricity is required to produce 0.25 mole of copper?
  • A. 1.00F
  • B. 0.01F
  • C. 0.05F
  • D. 0.50F
View Answer & Discuss (3) JAMB 2014
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