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Thursday, 02 April 2026
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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 16:
A saturated solution of AgCl was found to have a concentration of 1.30 x 10-5 mol dm-3. The solubility product of AgCl therefore is?
  • A 1.30 x 10-5 mol2 dm-6
  • B 1.30 x 10-7 mol2 dm-6
  • C 1.69 x 10-10 mol2 dm-6
  • D 2.60 x 10-12 mol2 dm-6
View Answer & Explanation
Question 17:
The hydroxyl ion concentrated, (OH-), in a solution of sodium hydroxide of pH 10.0 is?
  • A 10-10 mol dm-3
  • B 10-6 mol dm-3
  • C 10-4 mol dm-3
  • D 10-2 mol dm-3
View Answer & Explanation
Question 18:
Which of the aqueous solutions with the pH values below will liberate hydrogen when it react with magnesium metals?
  • A 13.0
  • B 7.0
  • C 6.5
  • D 3.0
View Answer & Explanation
Question 19:
Given that 15.00 cm3 of H2
SO4 was required to completely neutralize 25.00 cm3 of 0.125 mol dm-3 NaOH, calculate the molar concentration of the acid solution:
  • A 0.925 mol dm-3
  • B 0.156mol dm-3
  • C 0.104 mol dm-3
  • D 0.023 mol dm-3
View Answer & Explanation
Question 20:
When platinum electrodes are used during the electrolysis of copper (ll) tetraoxosulphate (lV) solution, the solution gets progressively?
  • A Acidic
  • B Basic
  • C Neutral
  • D Amphoteric
View Answer & Explanation