Solubility - Jamb Chemistry Past Questions and Answers

Question 66:

• JAMB 2006

When a crystal was added to the clear solution of its salt, the crystal did not dissolve and the solution remained unchange. This showed that the solution was

A. Supersaturated
B. Concentrated
C. Unsaturated
D. Saturated

Question 67:

• JAMB 2007

A supersaturated solution is said to contain

A. More solute than it can dissolve at that temperature in the presence of undissolved solute
B. As much solute as it can dissolve at that temperature in the presence of undissolved solute
C. As much solute as it can dissolve at that temperature
D. More solute than it can dissolve at that temperature

Question 68:

• JAMB 2008

The vulcanizer's solution is prepared by dissolving rubber in

A. Ethanol
B. Kerosine
C. Benzene
D. Petrol

Question 69:

• JAMB 2008

117.0g of sodium chloride was dissolved in the solubility in 1.0dm³ of distilled water at 25^oC. Determine the solubility in mol dm^-3 of sodium chloride at that temperature
[Na = 23, Cl = 35.5]

A. 1.0
B. 2.0
C. 3.0
D. 4.0

Question 70:

• JAMB 2010

Calculate the solubility in mol dm-3 of 40g of CuSO4 dissolved in 100g of water at 120oC.
[Cu = 64, S = 32, O = 16]

A. 4.00
B. 2.50
C. 0.40
D. 0.25