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Chemistry 1999 WAEC Past Questions

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26
The property of calcium chloride which makes it useful as a drying agent is that it is
  • A. ionic
  • B. deliquescent
  • C. a strong electrolyte
  • D. a normal salt
View Answer & Discuss WAEC 1999
27
Which of the following lowers the activation energy of a chemical reaction?
  • A. Freezing mixture
  • B. Reducing agent
  • C. Water
  • D. Catalyst
View Answer & Discuss (2) WAEC 1999
28
Consider the reaction represented by the following equation: H2(g) + 12(g) → 2HI(g). The number of effective collisions of molecules of the reactants decreases as
  • A. the temperature is raised
  • B. the pressure increased
  • C. the volume of the system is increased
  • D. a catalysty is intoduced into the system
View Answer & Discuss WAEC 1999
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29
What will be the effect of increase in pressure on the following system at equilibrium? 2NH2(g) N2(g) + 3H2(g)
  • A. Activation energy will decrease
  • B. the forward reaction will be favoured
  • C. the concentration of ammonia will increase
  • D. the reaction will go to completion
View Answer & Discuss (4) WAEC 1999
30
Which of the following is not correct about oxidation number convention? The oxidation number of a/an
  • A. element in the free state is zero
  • B. monatomic ion is equal to its charge
  • C. alkali meta like sodium in its compounds is + 1
  • D. atom of a diatomic molecules is + 2
View Answer & Discuss WAEC 1999
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709