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Chemistry Past Questions

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31

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 (7) JAMB 2022
32

An organic compound contains 69% carbon, 15.3% hydrogen and 30.7% oxygen. Calculate the the empirical formula [C=12, H = 1, O = 16]

  • A. C\(_4\)H\(_12\)O
  • B. C\(_3\)H\(_9\)O
  • C. C\(_4\)H\(_9\)O
  • D. C\(_3\)H\(_8\)O
View Answer & Discuss (6) JAMB 2022
33

Which of the following best represent solid gas mixture?

  • A. milk
  • B. kerosene
  • C. soil
  • D. smoke
View Answer & Discuss (1) JAMB 2022
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34

H\(^+\) + OH\(^-\) → H\(_2\)O

The equation above illustrates

  • A. precipitation
  • B. hydration
  • C. hydrolysis
  • D. neutralization
View Answer & Discuss (11) JAMB 2022
35
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 (23) JAMB 2022
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