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Chemistry 2014 JAMB Past Questions

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1
A mixture is different from a compound because
  • A. the properties of a compound are those of its individual constituents while those of a mixture differ from its constituents
  • B. a mixture is always homogeneous while a compound is not
  • C. the constituent of a compound are chemically bound together while those of a mixture are not
  • D. a mixture can be represented by a chemical formula while a compound cannot
View Answer & Discuss (4) JAMB 2014
2
What is the percentage of sulphur in sulphur (IV) oxide?
  • A. 66%
  • B. 25%
  • C. 40%
  • D. 50%
View Answer & Discuss (2) JAMB 2014
3
A gas X diffuses twice as fast as gas Y. if the relative molecular mass of X is 32, calculate the relative molecular mass of Y.
  • A. 128
  • B. 8
  • C. 16
  • D. 64
View Answer & Discuss (11) JAMB 2014
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4
200 cm3 of a gas at 25oC exerts a pressure of 700 mmHg. Calculate its pressure if its volume increase 350 cm3 at 75oC.
  • A. 342.53 mmHg
  • B. 1430.54 mmHg
  • C. 467.11 mmHg
  • D. 400.00 mmHg
View Answer & Discuss (9) JAMB 2014
5
An element X has electron configuration 1s2 2s2 2p6 3s2 3p5. Which of the following statements is correct about the element?
  • A. lt has a completely filled p-orbital
  • B. lt has 5 electrons in its outermost shell.
  • C. lt belongs to group ll on the periodic table
  • D. lt is a halogen
View Answer & Discuss (8) JAMB 2014
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