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Chemistry JAMB Past Questions

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1376
An acid and its conjugate base
  • A. can neutralise each other to form a salt
  • B. differ only by a proton
  • C. differ only by the opposite charges they carry
  • D. are always neutral substances
View Answer & Discuss (10) JAMB 1989
1377
The same current is passed for the same time through solutions of AgNO3 and CuSO4 connected in series. How much silver will be deposited if 1.0 g of copper is produced?
[Cu = 63.5, S = 32, O = 16, Ag = 108, N = 14]
  • A. 1.7 g
  • B. 3.4 g
  • C. 6. 8 g
  • D. 13. 6 g
View Answer & Discuss (13) JAMB 1989
1378

What is discharged at the cathode during the electrolysis of copper (ll) tetraoxosulphate (VI) solution?

  • A. Cu 2+ only
  • B. H + only
  • C. Cu 2+ and H
  • D. Cu 2+ and SO 2-
View Answer & Discuss (16) JAMB 1989
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1379
An element, Z froms an anion whose formula is [Z(CN)6]y. If Z has an oxidation number of +2, what is the value of y?
  • A. - 2
  • B. - 3
  • C. - 4
  • D. - 5
View Answer & Discuss (8) JAMB 1989
1380
The combustion of ethene, C 2H 4, is given by the equation C 2H 4 + 30 2 → 2CO2 + 2H2 O; ∆H = - 1428 KJ. If the molar heats of formation of water and carbon (IV) oxide are - 286 kJ and - 396 kJ respectively, calculate the molar heat of formation of ethene in KJ
  • A. - 2792
  • B. + 2792
  • C. - 64
  • D. + 64
View Answer & Discuss (8) JAMB 1989
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