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Chemistry JAMB Past Questions

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1086
A certain industrial process is represented by the chemical equation 2A(g) + B(g) \(\to\) C(g) + 3D(g) \(\Delta\)H = X kJmol-1. Which of the following conditions will favour the yield of the products?
  • A. increase in temperature, decrease in pressure
  • B. increase in temperature, increase in pressure
  • C. decrease in temperature,increase in pressure
  • D. decrease in temperature, decrease in pressure
  • E. constant in temperature, increase in pressure
View Answer & Discuss (22) JAMB 1985
1087
2MnO-4 + 10Cl- + 16H+ → 2Mn2+ + 5Cl2 + 8H2O. Which of the substances serves as an oxidizing agent?
  • A. Mn2+
  • B. Cl-
  • C. H2O
  • D. MnO-4
  • E. Cl2
View Answer & Discuss (5) JAMB 1985
1088
Which of the following metals will displace iron from a solution of iron(ll)tetraoxosulphate(lV)?
  • A. Copper
  • B. Mercury
  • C. Silver
  • D. Zinc
  • E. Gold
View Answer & Discuss (2) JAMB 1985
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1089

In the reaction H2(g)O \(\to\) H2(g) + 1/2O2(g)

ΔH = -2436000 KJ, which of the following has no effect on the equilibrium position?

  • A. Adding argon to the system
  • B. Lowering the temperature
  • C. Adding hydrogen to the system
  • D. Decreasing the pressure
  • E. Increasing the temperature
View Answer & Discuss (5) JAMB 1985
1090
Complete hydrogenation of ethyne yields?
  • A. benzene
  • B. methane
  • C. ethane
  • D. ethene
  • E. propane
View Answer & Discuss (3) JAMB 1985
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