Waec Chemistry 2010 Past Questions and Answers

Question 16:

• WAEC 2010

A given volume of oxygen diffused through a porous partition in 8 seconds. How long would it take the same volume of carbon (IV) oxide to diffuse under the same condition? [C = 12.0, O = 16.0]

A. 5.8 seconds
B. 6.8 seconds
C. 9.4 seconds
D. 11.0 seconds

Question 17:

• WAEC 2010

Which of the following gases contains the highest number of atoms at s.t.p?

A. 6 moles of neon
B. 3 moles of oxygen
C. 2 moles of chlorine
D. 1 mole of ethane

Question 18:

• WAEC 2010

The determination of heat of combustion is carried out with

A. A thermometer
B. A bomb calorimeter
C. An evaporating dish
D. A boiling tube

Question 19:

• WAEC 2010

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 20:

• WAEC 2010

Which of the following oxides is basic?

A. NO₂
B. AI₂O₃
C. SO₂
D. CaO