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Chemistry Past Questions

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1

2SO2(g) + O2(g) ↔ 2SO3(g)
ΔH = -189 kJ mol-1
The equilibrium constant for the reaction above is increased by?

  • A. decreasing the temperature of the system
  • B. Increase the pressure of the system
  • C. The addition of a catalyst to the system
  • D. Increasing the surface area of the vessel
View Answer & Discuss (16) JAMB 2001
2

C(s) + H2O(g) → H2(g) + CO2(g)
ΔG for the reaction above at 1300k is -43KJ. At this temperature, the reaction is?

  • A. not feasible
  • B. at equilibrium
  • C. feasible
  • D. exothermic
View Answer & Discuss (12) JAMB 2009
3

Two equal bulbs, one containing ammonia and the other nitrogen are opened mouth - to - mouth to each other at room temperature. The entropy in the mixture of gases is likely to?

  • A. remain unchange
  • B. increase
  • C. decrease
  • D. change
View Answer & Discuss (9) JAMB 2009
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
4

A catalyst increase the rate of a chemical reaction by providing a path that?

  • A. raise the activiation energy
  • B. increase the temperature
  • C. lowers the activation energy
  • D. increase the concentration
View Answer & Discuss (1) JAMB 2009
5

CuO(s) + H\(_2\)(g) ↔ Cu(s) + H\(_2\)O(g)
What is the effect of increasing the pressure on the equilibrium reaction above?

  • A. The equilibrium is shifted to the left
  • B. The equilibrium is shifted to the right
  • C. There is no effect
  • D. More H2(g) is produced
View Answer & Discuss (9) JAMB 2009
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WAEC offline past questions - with all answers and explanations in one app - Download for free
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709