Jamb Chemistry 1980 Past Questions and Answers

Question 31:

• JAMB 1980

Cellulose and starches can be classified as one of the following?

A. Sugars
B. Sucrose
C. Hydrocarbons
D. Carbohydrates
E. Isomers

Question 32:

• JAMB 1980

If one of the following oxides is heated with hydrogen or carbon using a bunsen burner, it is not reduced to the metal. Which one is it?

A. Lead oxide
B. Magnesium oxide
C. Copper oxide
D. Tin oxide
E. Iron oxide

Question 33:

• JAMB 1980

Which of the following statement is false?

A. Acids react with some metals, liberating hydrogen
B. Acids react with carbonates, liberating carbondioxide
C. Acids conduct electricity and are decomposed by the current, liberating hydrogen at the anode
D. Acids have a sour taste
E. Acids change the colour of indicators

Question 34:

• JAMB 1980

A mixture of ethanol, sodium dichromate, and water is allowed to drop gradually into a boiling solution containing one part concentrated H₂SO₄ and the liberate gas is collected by cooling it with ice water to give a liquid. This liquid is?

A. Ethanoic acid
B. Acetaldehyde
C. Ethyl acetate
D. Methanol
E. Ethylene

Question 35:

• JAMB 1980

When chlorine gas is passed into a solution of sulphur dioxide?

A. Sulphur dioxide is reduced to sulphur
B. The chlorine is oxidized to hydrochloric acid
C. Dilute sulphuric acid and hydrochloric acid are produced
D. Hydrochloric acid and sulphur are produced
E. Sulphur trioxide is the only product