Jamb Chemistry 1997 Past Questions and Answers

Question 16:

• JAMB 1997

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

Question 17:

• JAMB 1997

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

Question 18:

• JAMB 1997

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

Question 19:

• JAMB 1997

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

Question 20:

• JAMB 1997

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