Waec Chemistry Past Questions For Year 2010
Question 21
Which of the following oxides is basic?
- A. NO2
- B. AI2O3
- C. SO2
- D. CaO
Question 22
The minimum amount of energy required for effective collisions between reacting particles is known as
- A. activation energy
- B. bond energy
- C. kinetic energy
- D. potential energy
Question 23
Which of the following statements about the electrolysis of CuSO4(aq) using copper cathode and platinum anode is not correct?
- A. Copper is deposited at the cathode
- B. Oxygen is liberated at the anode
- C. it is used for the purification of copper
- D. The solution becomes acidic
Question 24
Which of the following statements about the cell notation Mg/Mg2+//Cu2+/Cu is correct?
- A. copper is the anode
- B. Manesium is reduced
- C. Magnesium is the anode
- D. The double line represents the electrodes
Question 25
The rate of chemical reaction of solids are not affected by
- A. catalyst
- B. pressure
- C. particle size
- D. temperature
