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Thursday, 02 April 2026
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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 1:
Which of the following equimolar solutions will have the highest pH?
  • A CH3COOHa
  • B NaOH
  • C HCl
  • D NH4OH
View Answer & Explanation
Question 2:
Which of the following equimolar solutions will have the highest pH?
  • A CH3COOHa
  • B NaOH
  • C HCl
  • D NH4OH
View Answer & Explanation
Question 3:
Which of the following ions require the largest quantity of electricity for discharge at an electrode?
  • A 4.0 moles of Cl-
  • B 3.0 moles of Na+
  • C 2.5 moles of Cu2+
  • D 2.0 moles of Al3+
View Answer & Explanation
Question 4:
Phenolphthalein in acidic solution is
  • A Red
  • B Orange
  • C Colourless
  • D Yellow
View Answer & Explanation
Question 5:
When iron is exposed to moisture and it rusts, the value of ΔG for the reaction is
  • A Neutral
  • B Zero
  • C Positive
  • D Negative
View Answer & Explanation