Jamb Chemistry Past Questions and Answers

Question 666:

• JAMB 1990

If 10.8 g of silver is deposited in a silver coulometer volume of oxygen liberated is?

A. 0.56 dm³
B. 5.60 dm³
C. 11.20 dm³
D. 22.40 dm³

Question 667:

• JAMB 1990

0.1 faraday of electricity deposited 2.95 g of nickel during electrolysis of an aqueous solution.
Calculate the number of moles of nickel that will be deposited by 0.4 faraday?
(Ni = 58.7)

A. 0.20
B. 0.30
C. 0.04
D. 5.87

Question 668:

• JAMB 1990

Changes in the physical in the scheme above.The letter X,Y and Z respectively represent

A. Sublimation, condensation and freezing
B. Sublimation, vapourization and solidification
C. Freezing, condensation and sublimation
D. Evaporation, liquefaction and solidification

Question 669:

• JAMB 1990

Use the graph above to answer this question. The structure of cis-2-butene is

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

Question 670:

• JAMB 1990

What is the IUPAC name for the hydrocarbon

A. 2-ethyl-4-methylpent-2-ene
B. 3,5-dimethylhex-3-ene
C. 2,4-dimethylhex 3-ene
D. 2-methyl-4-ethylpent-3-ene