Solubility - Jamb Chemistry Past Questions and Answers

Question 26:

• JAMB 1985

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. At room temperature (300 K)

A. Y is twice as soluble as X
B. X is twice as soluble as Y
C. X and Y are soluble to the same extent
D. X is three times as soluble as Y
E. Y is three times as soluble as X

Question 27:

• JAMB 1985

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. If 80 g each of X and Y are taken up in 100 g of water at 353 K we shall have

A. Only 10g of X undissolved
B. Only 16 g of Y undissolved
C. 10 g of X and 16 g of Y undissolved
D. All X and Y dissolved
E. All X and Y undissolved

Question 28:

• JAMB 1985

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. If the molar mass of X is 36 g, the number of moles of X dissolved at 343 K is

A. 0.2 moles
B. 0.7 moles
C. 1.5 moles
D. 2.0 moles
E. 3.0 moles

Question 29:

• JAMB 1985

Use the above options to the question. The products formed on hydrolysis of

A. A
B. B
C. C
D. D
E. E

Question 30:

• JAMB 1985

In the experiment, which of the following observations would suggest that a solid sample is a mixture? The

A. Solid can be ground to a fine powder
B. Density of the solid is 2.25gdm^-3
C. Solid begins to melt at 573k but is not completely melted until 648k
D. Solid absorbs moisture from the atmosphere and turns into liquid
E. Solid melts at 300k