Jamb Chemistry 2005 Past Questions and Answers

Question 1:

• JAMB 2005

Which of the following equimolar solutions will have the highest pH?

A. CH₃COOHa
B. NaOH
C. HCl
D. NH₄OH

Question 2:

• JAMB 2005

Which of the following equimolar solutions will have the highest pH?

A. CH₃COOHa
B. NaOH
C. HCl
D. NH₄OH

Question 3:

• JAMB 2005

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⁺

Question 4:

• JAMB 2005

Phenolphthalein in acidic solution is

A. Red
B. Orange
C. Colourless
D. Yellow

Question 5:

• JAMB 2005

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