Year :
2021
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
11 - 20 of 50 Questions
| # | Question | Ans |
|---|---|---|
|
Study the graphs below and use them to answer the question below. |
||
| 11. |
Which of the graphs illustrates the variation of the solubility of a salt in water (y-axis), with an increase in temperature (x-axis) if the dissolution process is exothermic? A. I B. II C. III D. IV |
D |
| 12. |
The formation of ethene from dehydration of ethanol can be described as------- A. an addition reaction B. an elimination reaction C. an oxidation reaction D. a substitution reaction |
B |
| 13. |
Which of the following gasses is highly soluble in water at room temperature A. ammonia B. carbon (IV) oxide C. chlorine D. nitrogen |
A |
| 14. |
A molecular of phosphorus is A. diatomic B. triatomic C. tetraatomic D. monoatomic |
C |
| 15. |
The most common method of preparing insoluble salts is by A. filtration B. decomposition C. neutralization D. double decomposition |
D |
| 16. |
What number of moles of oxygen would exert a pressure of 10 atm at 320 K in an 8.2 dm\(^{2}\) cylinder?[R = 0.082 atm dm\(^{3}\) mol\(^{-1}\) K\(^{-1}\)] A. 0.32 B. 1.56 C. 3.13 D. 31.25 |
C |
| 17. |
The basic property of salts used as drying agents is by A. efforescence B. high melting point C. hygroscopy D. low solubility |
A |
| 18. |
What would be observed when aqueous ammonia is added in drops and then in excess to a solution of copper(II) ions? A. blue precipitate is formed which is soluble in excess ammonia B. brick red precipitate is produced which is insoluble in excess ammonia C. which precipitate is formed which is excess in ammonia D. green precipitate is formed which is insoluble in excess ammonia |
A |
| 19. |
When CuSO\(_{4(aq)}\) is added to Pb(NO\(_{3}\))\(_{2(aq)}\)-------- A. there would be no visible change B. a blue precipitate would be formed C. the resulting solution would become colourless D. a white precipitate would be formed |
D |
| 20. |
Consider the structure below --missing photo-- A. 5 B. 4 C. 3 D. 2 |
A |
|
Study the graphs below and use them to answer the question below. |
||
| 11. |
Which of the graphs illustrates the variation of the solubility of a salt in water (y-axis), with an increase in temperature (x-axis) if the dissolution process is exothermic? A. I B. II C. III D. IV |
D |
| 12. |
The formation of ethene from dehydration of ethanol can be described as------- A. an addition reaction B. an elimination reaction C. an oxidation reaction D. a substitution reaction |
B |
| 13. |
Which of the following gasses is highly soluble in water at room temperature A. ammonia B. carbon (IV) oxide C. chlorine D. nitrogen |
A |
| 14. |
A molecular of phosphorus is A. diatomic B. triatomic C. tetraatomic D. monoatomic |
C |
| 15. |
The most common method of preparing insoluble salts is by A. filtration B. decomposition C. neutralization D. double decomposition |
D |
| 16. |
What number of moles of oxygen would exert a pressure of 10 atm at 320 K in an 8.2 dm\(^{2}\) cylinder?[R = 0.082 atm dm\(^{3}\) mol\(^{-1}\) K\(^{-1}\)] A. 0.32 B. 1.56 C. 3.13 D. 31.25 |
C |
| 17. |
The basic property of salts used as drying agents is by A. efforescence B. high melting point C. hygroscopy D. low solubility |
A |
| 18. |
What would be observed when aqueous ammonia is added in drops and then in excess to a solution of copper(II) ions? A. blue precipitate is formed which is soluble in excess ammonia B. brick red precipitate is produced which is insoluble in excess ammonia C. which precipitate is formed which is excess in ammonia D. green precipitate is formed which is insoluble in excess ammonia |
A |
| 19. |
When CuSO\(_{4(aq)}\) is added to Pb(NO\(_{3}\))\(_{2(aq)}\)-------- A. there would be no visible change B. a blue precipitate would be formed C. the resulting solution would become colourless D. a white precipitate would be formed |
D |
| 20. |
Consider the structure below --missing photo-- A. 5 B. 4 C. 3 D. 2 |
A |