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Chemistry 2021 WAEC Past Questions

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21

Under which conditions of pressure (p) and temperature (T) would the volume of an inflated ballon increase? When

  • A. P and T are increased
  • B. both T and P are decreased
  • C. T is increased and P is decreased
  • D. T is decreased and P is increased
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22

The collision between ideal gas molecules are considered to be perfectly elastic because

  • A. they collide without losing energy
  • B. they move randomly in a straight line
  • C. their average kinetic energy is variable
  • D. the distance between them is large compared to their size
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23

Elements with high ionization energies would-------

  • A. lose electrons easily
  • B. have large atomic radii
  • C. have high effective nuclear charges
  • D. have low atomic numbers
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24

Which of the following statements about Group VII elements is correct?

  • A. they are present in the same physical state
  • B. they are strong reducing agents
  • C. their reactivity decreases down the group
  • D. they exist as monoatomic molecules
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Consider the following diagram and use it to answer the question below

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25

Which of the following cell notations represent the diagram

  • A. B\(^{2}\)+/B/ /A/A\(^{3+}\)
  • B. A\(^{3+}\) /A/ /B/B\(^{2+}\)
  • C. B/B\(^{2+}\)/ /A/\(^{3+}\)
  • D. A/A\(^{3+}\)/ /B\(^{2+}\)/B
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WAEC offline past questions - with all answers and explanations in one app - Download for free
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
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208