Solubility - Jamb Chemistry Past Questions and Answers

Question 46:

• JAMB 1995

Deliquescent substances are also?

A. Efflorescent
B. Anhydrous
C. Hygroscopic
D. Insoluble

Question 47:

• JAMB 1995

The difference between colloides and and suspensions is brought out clearly by the fact that while colloids?

A. Do not scatter light, suspensions do
B. Can be separated by filtration, suspension cannot be so separated
C. Can be separated by a membrane, suspensions cannot
D. Do not settle out on standing, suspensions do

Question 48:

• JAMB 1995

In general, an increase in temperature increases the solubility of a solute in water because?

A. More solute molecules collide with each other
B. Most solutes dissolve with the evoltion of heat
C. More solute molecules dissociate at hihger temperatures
D. Most solutes dissolve with absorption of heat

Question 49:

• 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 50:

• JAMB 1998

Which of the following is observed when a solution of iron (III) chloride is mixed with a solution of sodium hydroxide?

A. A gas is evolved
B. A deep blue precipitate is formed
C. The resultant solution turns green turns
D. A brown precipitate is formed