Waec Chemistry 1995 Past Questions and Answers

Question 21:

• WAEC 1995

The gas produced when a mixture of sodium propanoate and soda lime is heated is

A. Methane
B. Pentane
C. Ethane
D. Butene
E. Ethyne

Question 22:

• WAEC 1995

In which of the following processes are larger molecules broken down into smaller molecules?

A. Vulcanization of rubber
B. Hydrogenation of palm oil
C. Hydrolysis of starch
D. Polymerization
E. Esterification

Question 23:

• WAEC 1995

The following alkanols will yield alkanoic acids on reacting with excess acidified K₂Cr₂O₇ except

A. CH₃CH₂OH
B. (CH₃)₂CHCH₂OH
C. (CH₃)₃CCH₂OH
D. (CH₃)₃COH
E. CH₃CH₂CH₂CH₂OH

Question 24:

• WAEC 1995

Which of the following is an alloy of mercury?

A. Stainless steel
B. Soft solder
C. Coinage bronze
D. Amalgam
E. Duralumin

Question 25:

• WAEC 1995

The function of limestone in the extraction of iron in the blast furnace is

A. Removal of the earthly impurities
B. Decomposition of the iron ore
C. Conversion of iron (lll) to iron (ll) compounds
D. Generation of heat for the process
E. Conversion of coke to carbon(ll)oxide