Acids, bases and salts - Jamb Chemistry Past Questions and Answers

Question 86:

• JAMB 1995

The option above shows the PH changes for the titration of a

A. Strong acid versus strong base
B. Weak acid versus strong base
C. Strong acid versus weak base
D. Weak acid versus weak base

Question 87:

• 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 88:

• 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 89:

• 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 90:

• JAMB 1997

In the diagram above the gas Y could be

A. Hydrogen chloride
B. Oxygen
C. Carbon (IV) oxide
D. Chlorine