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Chemistry JAMB Past Questions

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1111
Which of the following solutions will conduct the least amount of electricity?
  • A. 2.00 M aqueous solution of NaOH
  • B. 0.01 M aqueous solution of NaOH
  • C. 0.01 M aqueous solution of hexanoic acid
  • D. 0.01 M aqueous solution of sugar
View Answer & Discuss (10) JAMB 1986
1112

How many coulombs of electricity are passed through a solution in which 6.5 amperes are allowed to run for 1.0 hour?

  • A. 3.90 x 102 coulombs
  • B. 5.50 x 103 coulombs
  • C. 6.54 x 103 coulombs
  • D. 2.34 x 104 coulombs
View Answer & Discuss (8) JAMB 1986
1113
Which of these represents a redox reaction?
  • A. AgNO3 + NaCl → AgCAl + NaNO3
  • B. H2S + Pb(NO3) → PbS + 2HNO3
  • C. CaCO3 → CaO + CO2
  • D. Zn + 2HCl → ZnCl2 + H2
View Answer & Discuss (4) JAMB 1986
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1114
20 cm3 of 1.0 molar NH4OH solution when neutralized with 20.05cm3 of 0.1 molar HCl liberated -102 joules of heat. Calculate the heat of neutralization of NH4OH?
  • A. -51.O KJ mol-
  • B. +57.3 KJ mol-
  • C. +57.O KJ mol-
  • D. +51.0 KJ mol-
View Answer & Discuss (7) JAMB 1986
1115

What is the consequences of increasing pressure on the equilibrium reaction ZnO(s) + H2(g) Zn(s) + H2O(I)?

  • A. The equilibrium is driven to the left
  • B. The equilibrium is driven to the right
  • C. There is no effect
  • D. More ZnO is produced
View Answer & Discuss (15) JAMB 1986
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