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351

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
352

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
353

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
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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354

When pure aluminium metal is heated to red hot in the presence of nitrogen gas, the compound formed is

  • A. Al2N
  • B. Al2N2
  • C. AlN
  • D. Al2N3
View Answer & Discuss (8) JAMB 2005
355

A dense white fume is formed when ammonia gas reacts with

  • A. O2(g)
  • B. H2(g)
  • C. Cl2(g)
  • D. HCl(g)
View Answer & Discuss (6) JAMB 2005
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