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Chemistry 2005 JAMB Past Questions

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31

A heterogenous mixture can be defined as any mixture

  • A. of a solute and a solvent
  • B. whose composition is uniform
  • C. whose composition is not uniform
  • D. formed by solids and liquids
View Answer & Discuss (2) JAMB 2005
32

The pressure of 100cm\(^3\) of oxygen at 35\(^0\)C is 750mmHg. What will be the volume of gas if the pressure is reduced to 100mmHg without changing the temperature?

  • A. 650 cm3
  • B. 850 cm3
  • C. 580 cm3
  • D. 750 cm3
View Answer & Discuss (9) JAMB 2005
33

I. Treatment of cancer
II. Detection of leakages in water mains
III. Detection of the ages of ancient tools
IV. Preparation of drugs
Which combination of the above refers to the uses of radioactive isotopes?

  • A. I and III
  • B. I and II
  • C. I, II and III
  • D. I, II, III and IV
View Answer & Discuss (11) JAMB 2005
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34

What is the valence shell electron configuration of the element with atomic number 17?

  • A. 1s2 2s2 2p6 3s2 3p4
  • B. 1s2 2s2 2p6 3s2 3p5
  • C. 2s2 2p6
  • D. 3s2 3p5
View Answer & Discuss (40) JAMB 2005
35

The density of a certain gas is 1.98gdm\(^{-3}\) at s.t.p. What is the molecular mass of the gas?

  • A. 44.0 g
  • B. 54.0 g
  • C. 26.0 g
  • D. 31.0 g
View Answer & Discuss (4) JAMB 2005
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