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Chemistry JAMB Past Questions

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1436

At S. T. P how many litres of hydrogen can be obtained from the reaction of 500 cm\(^3\) of 0.5 M H\(_2\)SO\(_4\) with excess zinc metal?
(Gram molecular volume of H\(_2\) = 22.4 dm\(^3\))

  • A. 22.4 dm 3
  • B. 11 . 2 dm 3
  • C. 6. 5 dm 3
  • D. 5. 6 dm 3
  • E. 0. 00 dm 3
View Answer & Discuss (9) JAMB 1984
1437
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 (5) JAMB 2014
1438
What is the percentage of sulphur in sulphur (IV) oxide?
  • A. 66%
  • B. 25%
  • C. 40%
  • D. 50%
View Answer & Discuss (2) JAMB 2014
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1439
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 (19) JAMB 2014
1440

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 (11) JAMB 2014
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