Organic Compounds - Jamb Chemistry Past Questions and Answers

Question 101:

• JAMB 1989

The gas responsible for most of the fatal explosions in coal mines is

A. Butane
B. Ethene
C. Ethane
D. Methane

Question 102:

• JAMB 1989

Three liquids X, Y and Z containing only hydrogen and carbon were burnt on a spoon. X and Y burnt with sooty flames while Z did not. Y is able to discharge the colour of bromine water whereas X and Z cannot. Which of the liquids would be aromatic in nature?

A. X and Z
B. Y
C. X
D. Z

Question 103:

• JAMB 1989

It can be deduced from the vapour pressure curves above that

A. Liqiud 1 has the highest boiling point
B. Liquid ll has the highest boiling point
C. Liquid lll has the highest boiling point
D. Liquid lll has the lowest boiling point

Question 104:

• JAMB 1989

In the above set up substances X and Y are respectively

A. Lime water copper (ll) tetraoxosulphate (lV)
B. Potassium trioxocarbonate and alkaline pyrogallol
C. Potassium hydroxide and alkaline pyrogallol
D. Potassium trioxocarbonate (lV) and concentrated tetraoxosulphate (IV) acid

Question 105:

• JAMB 1989

What is the IUPAC name for the compound

A. 1-chloro-2-methylprop-2,3-ene
B. 1-chloro-2-methylprop-2-ene
C. 3-chloro-2-methylprop-1-ene
D. 3-chloro-2methylprop-1,2-ene