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Chemistry 1997 WAEC Past Questions

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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1

The phenomenon observed when dust particles collide randomly in a beam of sunlight is known as?

  • A. Tyndal effect
  • B. diffusion
  • C. osmosis
  • D. brownian movement
  • E. dialysis
View Answer & Discuss (6) WAEC 1997
2
The mass number of an element is the sum of its
  • A. electrons, neutrons and protons
  • B. electrons and protons
  • C. protons and neutrons
  • D. orbital electrons
  • E. valence electrons
View Answer & Discuss (1) WAEC 1997
3
How many unpaired electrons are there in an atom of an element with the following electronic configuration? 1s22s22p6
  • A. o
  • B. 1
  • C. 2
  • D. 6
  • E. 8
View Answer & Discuss (1) WAEC 1997
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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4
Radon is used as a tracer in medical research because it
  • A. is monatomic
  • B. is radioactive
  • C. is a noble gas
  • D. has a complete valence shell
  • E. has a low boiling point
View Answer & Discuss (2) WAEC 1997
5
What is the most probable group of an element which is a soft, silvery white solid and reacts violently with water?
  • A. Group 0
  • B. Group 1
  • C. Group 4
  • D. Group 6
  • E. Group 7
View Answer & Discuss WAEC 1997
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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