JAMB 2014 : Chemistry

1A 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
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2What is the percentage of sulphur in sulphur (IV) oxide

  • A. 0.66
  • B. 0.25
  • C. 0.4
  • D. 0.5
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3A 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
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4200 of a gas at exerts a pressure of 700 mmHg. Calculate its pressure if its volume increase 350 at .

  • A. 342.53 mmHg
  • B. 1430.54 mmHg
  • C. 467.11 mmHg
  • D. 400.00 mmHg
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5An element X has electron configuration . 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. It is a halogen
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