Jamb Chemistry 1979 Past Questions and Answers

Question 1:

• JAMB 1979

An organic compound X has the following properties: I. It is not miscible with water. ll. lt has boiling point of 77^oC lll. lt has a sweet odour lV. lt is insoluble in sodium hydrogen carbonate solution . V lt does not decolourize bromine water X is therefore

A. Methane
B. Ethanoic acid
C. Ethene
D. Ethyl ethanoate
E. Carbon tetrachloride

Question 2:

• JAMB 1979

An organic compound X has the following properties: I. It is not miscible with water. ll. lt has boiling point of 77^oC lll. lt has a sweet odour lV. lt is insoluble in sodium hydrogen carbonate solution . V lt does not decolourize bromine water X is therefore

A. Methane
B. Ethanoic acid
C. Ethene
D. Ethyl ethanoate
E. Carbon tetrachloride

Question 3:

• JAMB 1979

Which are the correct IUPAC names for H-CO\(_2\)CH\(_3\) and CH \(\equiv\) CH

A. Methyl methanoate and ethene
B. Metanoic acid and ethyne
C. Ethyl methanoate and ethyne
D. Methyl methanoate and ethyne
E. Ethanoic acid and ethene

Question 4:

• JAMB 1979

Which of the following substances are all made by the process of polymerization?

A. Nylon and soap
B. Ethanoic acid margarine and ethanol
C. Nylon and artificial rubber
D. Soap and butane
E. Margarine and nylon

Question 5:

• JAMB 1979

The reaction of zinc with copper (ll) ions in aqueous solution can be represented as follows: Cu ²⁺(aq) +Zn (s) → Cu(s) + Zn ²⁺(aq).Which of the following is the most complete description of this reaction?

A. Cpper (ll) ions are being reduced
B. Zinc is being oxidized.
C. Copper (ll) ions and zinc are being reduced
D. Copper (ll) ions and zinc are being oxidized
E. Copper(ll) ions are being reduced and zinc oxidized