Year :
2010
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
11 - 20 of 38 Questions
| # | Question | Ans |
|---|---|---|
| 11. |
Consider the neutralization reaction represented by the following equation: Na2CO3 + 2HNO 3 → 2NaNO3 + H2O + CO2 The stoichiometric ratio of acid to base is A. 2:2 B. 2:1 C. 1:2 D. 1:1 Detailed SolutionThe mole ratio of acid to base = 2:1 |
|
| 12. |
A solution of sodium trioxocarbonate (IV) contains 10.6g in 250cm3 of solution. Calculate the concentration of the solution. [Na2CO3 = 106.0] A. 0.4 mol dm-3 B. 1.0 mol dm-3 C. 10.6 mol dm-3 D. 25.0 mol dm-3 |
A |
| 13. |
What is the volume occupied by 2 moles of ammonia at s.t.p? A. 44.8 dm-3 B. 22.4 dm-3 C. 11.2 dm-3 D. 5.6 dm-3 |
A |
| 14. |
Which of the following apparatuses can be used to measure accurately a specific volume of a liquid? A. Beaker B. Conical flask C. Measuring cylinder D. Pipette |
C |
| 15. |
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 |
C |
| 16. |
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 |
A |
| 17. |
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 |
B |
| 18. |
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 |
A |
| 19. |
Which of the following oxides is basic? A. NO2 B. AI2O3 C. SO2 D. CaO |
D |
| 20. |
Which of the following equimolar solutions would have the highest conductivity? A. NH4NO3(aq) B. NaNO3(aq) C. Mg(NO3)2(aq) D. AI(NO3)3(aq) |
B |
| 11. |
Consider the neutralization reaction represented by the following equation: Na2CO3 + 2HNO 3 → 2NaNO3 + H2O + CO2 The stoichiometric ratio of acid to base is A. 2:2 B. 2:1 C. 1:2 D. 1:1 Detailed SolutionThe mole ratio of acid to base = 2:1 |
|
| 12. |
A solution of sodium trioxocarbonate (IV) contains 10.6g in 250cm3 of solution. Calculate the concentration of the solution. [Na2CO3 = 106.0] A. 0.4 mol dm-3 B. 1.0 mol dm-3 C. 10.6 mol dm-3 D. 25.0 mol dm-3 |
A |
| 13. |
What is the volume occupied by 2 moles of ammonia at s.t.p? A. 44.8 dm-3 B. 22.4 dm-3 C. 11.2 dm-3 D. 5.6 dm-3 |
A |
| 14. |
Which of the following apparatuses can be used to measure accurately a specific volume of a liquid? A. Beaker B. Conical flask C. Measuring cylinder D. Pipette |
C |
| 15. |
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 |
C |
| 16. |
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 |
A |
| 17. |
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 |
B |
| 18. |
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 |
A |
| 19. |
Which of the following oxides is basic? A. NO2 B. AI2O3 C. SO2 D. CaO |
D |
| 20. |
Which of the following equimolar solutions would have the highest conductivity? A. NH4NO3(aq) B. NaNO3(aq) C. Mg(NO3)2(aq) D. AI(NO3)3(aq) |
B |