Jamb Chemistry 1980 Past Questions and Answers

Question 36:

• JAMB 1980

In the above experiment X is

A. Pure nitrogen
B. A mixture of nitrogen and oxygen
C. A mixture of nitrogen and carbondioxide
D. A mixture of oxygen and inert gases
E. A mixture of nitrogen and inert gases

Question 37:

• JAMB 1980

The IUPAC name for the compound is

A. 2,3-dimethylpent-2,3-ene
B. 2, 3- dimethylpent-2-ene
C. 3, 4-dimethylpent-3-ene
D. 3,4-dimethylpentene
E. 3,4-dimethlhept-2-ene

Question 38:

• JAMB 1980

Which of the following compounds will take up the molecules of bromine?

A. L
B. Ll
C. Lll
D. L and ll
E. L and lll

Question 39:

• JAMB 1980

Which of the following is the correct order in the above diagram increasing boiling point, of the isomeric \(C_{5}H_{12}\) compounds?

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

Question 40:

• JAMB 1980

The following graph demonstrates the rate of reaction between calcium carbonate (marble)and dilute hydrochloric acid. The graph shows that the rate of reaction is initially greatest when

A. The initial slope of the curve is steepest and this occur when small pieces of marble are used and is due to a small surface area of reactant
B. The occur when large pieces of marble are used and is due to a small surface area of reactant
C. The initial slope of the curve is steepest and this occurs when small pieces of marble are used and is due to a large surface area of reactant
D. The initial slope of the curve is steepest and this occur when large surface area of reactant
E. The initial slope of the curve is least steep and this occur when small pieces of marble are used and is due to the increased surface area of the reactant