Solubility - Jamb Chemistry Past Questions and Answers

Question 36:

• JAMB 1989

What is the partial pressure of hydrogen gas collected
over water at standard atmospheric pressure and 25 ^oC if the saturation vapour pressure of water at saturation vapour pressure of water is 23 mm Hg at that temperature?

A. 737 mm Hg
B. 763 mm Hg
C. 777 mm Hg
D. 783 mm Hg

Question 37:

• JAMB 1990

The solubility in moles per dm³ of 20g of CuSO₄ dissolve in 100 of water at 180°C is?
(Cu = 63.5, S = 32, O = 16)

A. 0.13
B. 0.25
C. 1.25
D. 2.00

Question 38:

• JAMB 1991

Oxygen gas can be prepared by heating?

A. Ammonium trioxonitrate (V)
B. Ammonium trioxonitrate (III)
C. Ppotassium trioxonitrate (V)
D. Mamgamese (IV) oxide

Question 39:

• JAMB 1992

On which of the following is the solubility of a gaseous substance dependent? I. Nature of solvent II. Nature of solute III. Temperature IV. Pressure

A. I, II, III and IV
B. I and II only
C. II only
D. I, III and IV only

Question 40:

• JAMB 1992

An emulsion paint consists of ?

A. Gas or liquid particles dispersed in liguid
B. Liquid particles dispersed in liquid
C. Solid particles dispersed in liquid
D. Solid particles dispersed in solid