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Chemistry Past Questions

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4566

In the electrolysis of brine using neutral electrode, which ion is discharged at the anode?

  • A. 2H\(^+\)
  • B. Na\(^+\)
  • C. Cl\(^-\)
  • D. OH\(^-\)
View Answer & Discuss (7) JAMB 2025
4567

The time required to deposit 4.5g of copper from CuSO\(_4\) solution by passing a current of 2.5 Amperes is (Cu = 64g ; 1F = 96500C/mol)

  • A. 2714 sec
  • B. 2527 sec
  • C. 5428 sec
  • D. 6785 sec
View Answer & Discuss (6) JAMB 2025
4568

Which of the following pairs of elements will exhibit diagonal relationship?

  • A. Be and Si
  • B. Na and Be
  • C. Li and Al
  • D. B and Si
View Answer & Discuss (10) JAMB 2025
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4569

The following is not a water pollutant?

  • A. warm water affluent
  • B. inorganic fertilizers
  • C. oxygen gas
  • D. biodegradable waste
View Answer & Discuss (2) JAMB 2025
4570

Acid radicals are present in 

  • A. CO\(_3\)\(^{2-}\), PO\(_4\)\(^{3-}\), Mg\(^{2+}\)
  • B. CO\(_3\)\(^{2-}\), SO\(_4\)\(^{2-}\), Na\(^+\)
  • C. CO\(_3\)\(^{2-}\), SO\(_4\)\(^{2-}\), NO\(_3\)\(^-\)
  • D. CO\(_3\)\(^{2-}\), SO\(_4\)\(^{2-}\), K\(^+\)
View Answer & Discuss (2) JAMB 2025
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