Waec Chemistry 2009 Past Questions and Answers

Question 36:

• WAEC 2009

Which of the following substances is the anode in the dry Leclanche cell ?

A. Carbon rod
B. Muslin bag
C. The seal
D. Zinc container

Question 37:

• WAEC 2009

Consider the reaction represented by the equation: 2H₂SO _4(aq0 + C_(s) → 2H₂O_(l) + 2SO_2(g) + CO _2(g) H₂SO ₄ is acting as

A. A catalyst
B. An oxidizing agent
C. A reducing agent
D. A sulphonating agent

Question 38:

• WAEC 2009

Which of the following oxides of nitrogen has oxidation number of + 1?

A. KNO₃
B. N₂O
C. N₂O₃
D. NO

Question 39:

• WAEC 2009

The separation of petroleum fractions depends on the differences in their

A. Boiling points
B. Molar masses
C. Melting point
D. Solubilities

Question 40:

• WAEC 2009

Which of the following raw materials is used in the plastic industry ?

A. Calcium
B. Ethene
C. Hydrogen
D. Methane