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Chemistry Past Questions

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61

The solution with the lowest pH value is 

  • A. 5 ml of (m/10) HCl
  • B. 10 ml of (m/10) HCl
  • C. 15 ml of (m/5) HCl
  • D. 20 ml of (m/8) HCl
View Answer & Discuss (35) JAMB 1999
62

The solubility product of Cu(IO3)2 is 1.08 * 10-7. Assuming that neither ions react appreciable with water to form H+ and OH-, what is the solubility of this salt?

  • A. 2.7 * 10-8 mol dm-3
  • B. 9.0 * 10-8 mol dm-3
  • C. 3.0 * 10-3 mol dm-3
  • D. 9.0 * 10-3 mol dm-3
View Answer & Discuss (41) JAMB 1999
63
The entropy and enthalpy of a system are a measure of
  • A. degree of disorderlinesss and heat content respectively
  • B. heat content and degree of disorderliness respectively
  • C. heat content of a system only
  • D. degree of disorderliness only
View Answer & Discuss (6) JAMB 1999
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64
2SO2(g) + O2(g) ↔ 2SO3(g). In the chemical reaction above, the substance that will increase the rate of production of sulphur (VI) oxide is
  • A. manganese (IV) oxide
  • B. finely divided iron
  • C. vanadium (V) oxide
  • D. nickel
View Answer & Discuss (11) JAMB 1999
65

N\(_2\)O\(_4\)(g) ↔ 2NO\(_2\)(g). Increase in total pressure of the equilibrium reaction above will

  • A. produce more of NO2(g) in the mixture
  • B. convert all of N2O4(g) to NO2(g)
  • C. have no effect on the concentrations of NO2(g)and N2O4(g)
  • D. produce more of N2O4(g) in the mixture
View Answer & Discuss (10) JAMB 1999
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