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Chemistry 2012 JAMB Past Questions

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21
A major factor considered in selecting a suitable method for preparing a simple salt is its
  • A. Crystalline from
  • B. melting point
  • C. reactivity with dilute acids
  • D. solubility in water
View Answer & Discuss JAMB 2012
22
The oxidation number of boron in NaBH 4 is
  • A. -3
  • B. -1
  • C. +1
  • D. +3
View Answer & Discuss (6) JAMB 2012
23

\(Na_2O_{2(s)} + H_2O_{(1)}\)→ \(NaOH_{(s)} +O_{2(g)}\)
The substance that is oxidized in the reaction above is

  • A. \(Na_2O_{2(s)}\)
  • B. NaOH(aq)
  • C. H2O(1)
  • D. O2(g)
View Answer & Discuss (8) JAMB 2012
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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24

What number of moles of Cu 2+ will be deposited by 360 coulombs of electricity?
[f = 96500 C mol -1]

  • A. 5.36 x 10 -4 mole
  • B. 1. 87 x 10 10 -3 mole
  • C. 9. 35 x 10 -4 mole
  • D. 3. 73 x 10 -3
View Answer & Discuss (5) JAMB 2012
25

A metal M displaces zinc from ZnCl solution
This shows that

  • A. electrons flow from zinc to M
  • B. M is more electropositive than zinc
  • C. M is more electonegative than zinc
  • D. zinc is more electropositive than M
View Answer & Discuss (1) JAMB 2012
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