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Chemistry JAMB Past Questions

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1481
The flame used by welders in cutting metals is
  • A. butane gas flame
  • B. acetylene flame
  • C. kerosene flame
  • D. oxy-acetylene flame
  • E. oxygen flame
View Answer & Discuss JAMB 1983
1482
Consecutive members of an alkane homologous serires differ by
  • A. CH
  • B. CH2
  • C. CH3
  • D. CnHn
  • E. CnH
View Answer & Discuss (1) JAMB 1983
1483
If an element has the electronic configuration 1s 2 2s2 2p3 3s2 3p4, it is
  • A. a metal
  • B. an alkaline earth metal
  • C. an s-block element
  • D. a p-Block element
  • E. a transition element
View Answer & Discuss (11) JAMB 1983
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1484
Some copper (ll) sulphate pentahydrate (CuSO4 5H2O), was heated at 120 oC with the following results. Wt of crucible = 10.00 g; Wt of crucible + CuSO4 5H2O =14.98g; Wt of crucible + residue = 13.54 g. How many molecules of water of crystalization were lost?

[H = 1, Cu = 63.5, O = 16, S = 32]
  • A. 1
  • B. 2
  • C. 3
  • D. 4
  • E. 5
View Answer & Discuss (8) JAMB 1983
1485
The three-dimensional shape of methane is
  • A. hexagonal
  • B. trigonal
  • C. linear
  • D. tetrahedral
  • E. cubical
View Answer & Discuss (2) JAMB 1983
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