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Chemistry 2011 JAMB Past Questions

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11
What type of bond exits between an element X with atomic number 12 and Y with atomic number 17?
  • A. Electrovalent
  • B. Metallic
  • C. Covalent
  • D. Dative
View Answer & Discuss (5) JAMB 2011
12

Hardness of water is mainly due to the presence of

  • A. calcium hydroxide or magnesium hydroxide
  • B. calcium trioxocarbonate (IV) or calcium tetraoxosulphate (VI)
  • C. sodium hydroxide or magnesium hydroxide
  • D. calcium chloride or sodium chloride salts
View Answer & Discuss (6) JAMB 2011
13

A suitable solvent for iodine and naphthalene is

  • A. carbon (IV) sulphide
  • B. ethanol
  • C. water
  • D. benzene
View Answer & Discuss (12) JAMB 2011
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14

Which of the following noble gases is commonly found in the atmosphere?

  • A. Xenon
  • B. Neon
  • C. Helium
  • D. Argon
View Answer & Discuss (6) JAMB 2011
15
N2O4(g) ↔ 2NO2(g) ΔH = +ve
In the reaction above, an increase in temperature will
  • A. increase the value of the equilibrium constant
  • B. decreases the value of the equilibrium constant
  • C. increase in the reactant production
  • D. shift the equilibrium to the left
View Answer & Discuss (10) JAMB 2011
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