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Chemistry 2001 NECO Past Questions

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1
20 cm3 of 0.09 mol dm3 solution of tetraoxosuiphate (Vi) acid requires 30cm3 of sodium hydroxide solution for complete neutralization. The molar concentration of sodium hydroxide is [H = 1; S = 32; 0 = 16; Na = 23]
  • A. 0.03 mol dm3
  • B. 0.12 mol dm3
  • C. 0.27 mol dm3
  • D. 0.45 mol dm3
  • E. 0.90 mol dm3
View Answer & Discuss (6) NECO 2001
2
The decreasing order of the oxidising power of the halogens is
  • A. Br>I>Cl>F
  • B. F>I>Cl>Br
  • C. F>Cl>Br>l
  • D. I>Br>Cl>F
  • E. Cl>Br>F>I
View Answer & Discuss (6) NECO 2001
3

Which statement BEST describes the process of oxidation?

  • A. addition of hydrogen
  • B. loss of oxygen
  • C. decrease in oxidation number
  • D. loss of electrons
  • E. gain of elections.
View Answer & Discuss (5) NECO 2001
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4

Animal charcoal differs from wood charcoal in that it

  • A. has a dark colour
  • B. has a high carbon content
  • C. is a good absorbent
  • D. is crystalline.
  • E. is rich in phosphate content
View Answer & Discuss (3) NECO 2001
5

The atomic number of iron is 56. The number of unpaired electrons in the Fe3+ ion is

  • A. 1
  • B. 2
  • C. 3
  • D. 4
  • E. 5
View Answer & Discuss (17) NECO 2001
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