Jamb Chemistry 1985 Past Questions and Answers

Question 31:

• 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 32:

• 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 33:

• 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 34:

• JAMB 1985

The oxidation of

A. 2-butanone
B. 2-butanal
C. Butane
D. Butanoic acid
E. 3-butanal

Question 35:

• JAMB 1985

The I.U.P.A.C name for the compound

A. 2-methyl-3-pentene
B. 4-methyl-2-pentane
C. 2-methyl-2-pentene
D. 4-methylpent-2-ene
E. 2-methyl-3-pentane