Chemistry 2012 Waec Past Questions and Answers

Question 41 :

• WAEC 2012

Which of the following industrial processes depends on the action of enzymes?

A. Liquefaction of air
B. Manufacture of soap
C. Brewing of beer
D. Catalytic cracking

Question 42 :

• WAEC 2012

Which of the following pollutants is not usually recycled?

A. Aluminium cans
B. Glass bottles
C. Nuclear wastes
D. Paper wastes

Question 43 :

• WAEC 2012

A metal that is widely used in the manufacture of paints and overhead electric cables is

A. Aluminium
B. Copper
C. Iron
D. Lead

Question 44 :

• WAEC 2012

Brass is a mixture of

A. Cu and Sn
B. Cu and Zn
C. Cu and Mg
D. Cu and Pb

Question 45 :

• WAEC 2012

Which of the following substances is mainly responsible for the depletion of the ozone layer?

A. Oxgyen
B. Chlorofluorocarbon
C. Carbon (ll) oxide
D. Nitrogen (ll) oxide