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Chemistry 1984 JAMB Past Questions

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11
For the reaction 2Fe3+ 2I- \(\to\) 2Fe2+ + I2, which of the following statements is TRUE?
  • A. Fe is oxidized to Fe3+
  • B. Fe3+ is oxidized to Fe2+
  • C. I- is oxidized to I2
  • D. I- is reduced to I2
  • E. I- is displacing an electron from Fe3+
View Answer & Discuss (7) JAMB 1984
12
In dilute solution the heat of the reaction NaOH + HCl = NaCl + H2O is - 57.3kJ. Therefore the heat of the reaction 2NaOH + H2SO4 \(\to\) Na2SO4 + 2H2O is
  • A. + 28.65 kJ
  • B. - 28.65KJ
  • C. + 57.3KJ
  • D. - 114.6 KJ
  • E. - 229.2 KJ
View Answer & Discuss (6) JAMB 1984
13
Which of the following methods may be used to prepare trioxonitrate (V) acid (nitric acid) in the laboratory?
  • A. Heating ammonia gas with tetraoxosulphate (VI) acid
  • B. Heating ammonium trioxonitrate (V) with tetraoxosulphate (VI) acid
  • C. Heating sodium trioxonitrate (V) with tetraoxosulphate (VI) acid
  • D. Heating potassium trioxonitrate (V) with calcium hydroxide
  • E. Heating a mixture of ammonia gas and oxygen.
View Answer & Discuss (4) JAMB 1984
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14
Lime - water, which is used in the laboratory for the detection of carbon(iv)oxide is an aqueous solution of
  • A. Ca(OH)2
  • B. CaCO3
  • C. CaHCO3
  • D. CaSO4
  • E. N2CO3
View Answer & Discuss (1) JAMB 1984
15
An element that can exist in two or more different structural forms which possess the same chemical properties is said to exhibit.
  • A. polymerism
  • B. isotopy
  • C. isomorphism
  • D. isomerism
  • E. allotrophy
View Answer & Discuss (16) JAMB 1984
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