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Chemistry Past Questions

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6

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 (8) WAEC 1997
7

The sub-atomic particles located in the nucleus of an atom are?

  • A. neutron and proton
  • B. proton and electron
  • C. proton and ions
  • D. neutron and electron
View Answer & Discuss (1) JAMB 2022
8

How many neutrons are present in atom with mass number and atomic number 37 and 17 respectively?

  • A. 18
  • B. 20
  • C. 37
  • D. 17
View Answer & Discuss (3) JAMB 2022
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
9
GAS CO\(_2\) N\(_2\)

O\(_2\)

% BY VOLUME 4 72 24

The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?

  • A. CO\(_2\) and O\(_2\)
  • B. N\(_2\) and CO\(_2\)
  • C. CO\(_2\), O\(_2\) and N\(_2\)
  • D. O\(_2\) and N\(_2\)
View Answer & Discuss (13) JAMB 2022
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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 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