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Chemistry 2006 JAMB Past Questions

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41

In the electrolysis of CuSO\(_4\)(g) using platinum electrodes, the reaction at the anode is

  • A. 4H+ + 4e- → 2H2
  • B. 4OH- + 4e- → 2H2O + O2
  • C. 2OH - 2e- → 2OH
  • D. 2OH- + 2OH- → 2H2O + O2
View Answer & Discuss (5) JAMB 2006
42

Na\(_2\)CO\(_3\)(g) + 2HCl(aq) → 2NaCl(aq) + H\(_2\)O(l) + CO\(_2\)(g)
How many moles of sodium trioxocarbonate (IV) are there in a 25 cm\(^3\) solution which required 10cm\(^3\) of 0.05 mol dm\(^3\) hydrochloric acid solution to neutralize it?

  • A. 1.000 mole
  • B. 0.100 mole
  • C. 0.010 mole`
  • D. 0.111 mole
View Answer & Discuss (21) JAMB 2006
43

If the heat of combustion of hydrogen is -285.8kJ,
What is the heat of formation of water?

  • A. +571.6 kJ
  • B. -571.6 kJ
  • C. -285.8 kJ
  • D. +285.8 kJ
View Answer & Discuss (16) JAMB 2006
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44

5SO\(_2\)(g) + 2KMnO\(_4\)(aq) + 2H\(_2\)O(l) → K\(_2\)SO\(_4\) + 2MnSO\(_4\)(aq) + 2H\(_2\)SO\(_4\)(aq)
In the reaction above, the products give a

  • A. purple solution
  • B. purple precipitate
  • C. colourless precipitate
  • D. colourless solution
View Answer & Discuss (2) JAMB 2006
45

In the diagram above, gas X is

  • A. hydrogen
  • B. chlorine
  • C. oxygen
  • D. hydrogen chloride
View Answer & Discuss (3) JAMB 2006
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