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Chemistry Past Questions

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3271

The figure above shows the electrolysis of molten sodium chloride. Z is the

  • A. anode where the Cl\(^-\) ions are oxidized
  • B. cathode where the Cl\(^-\) ions are reduced
  • C. anode where the Na\(^+\) ions are reduced
  • D. cathode where the Na\(^+\) ions are oxidized
View Answer & Discuss (6) JAMB 2018
3272

The knowledge of half-life can be used to

  • A. Create an element
  • B. Detect an element
  • C. to combine elements
  • D. Irradiate an element
View Answer & Discuss (10) JAMB 2018
3273

An element X forms the following compounds with chlorine; XCl\(_4\), XCl\(_3\), XCl\(_2\). This illustrates the

  • A. law of multiple proportions
  • B. law of chemical proportions
  • C. law of simple proportions
  • D. law of conservation of mass
View Answer & Discuss (3) JAMB 2018
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3274

The hydrogen ion concentration of a sample of orange juice is 2.0 X 10\(^{-11}\)moldm\(^{-3}\). What is its p\(^{OH}\)? [log102 = 0.3010]

  • A. 3.30
  • B. 13.00
  • C. 10.70
  • D. 11.30
View Answer & Discuss (10) JAMB 2018
3275

2SO\(_2\) \(_{(g) }\)+ O\(_2\) \(_{(g) }\) ↔ 2SO\(_3\)\(_{(g) }\) ΔH = -395.7kJmol\(^{-1}\)
In the equation, an increase in temperature will shift the equilibrium position to the

  • A. left and equilibrium constant decreases
  • B. left and equilibrium constant increases
  • C. right and equilibrium constant increases
  • D. right and equilibrium constant decreases
View Answer & Discuss (7) JAMB 2018
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