Year :
1992
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
11 - 20 of 37 Questions
| # | Question | Ans |
|---|---|---|
| 11. |
The scum formed when soap is mixed with hard water could be A. calcium trioxocarbonate (IV) B. propane- 1, 2, 3 - triol C. calcium hydrogentrioxocarbonate (IV) D. magnesium tetraoxosulphate (IV) E. calcium stearate |
A |
| 12. |
What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45 mins? (1F = 96500C) A. 11F B. 0.12F C. 0.22F D. 1.1F E. 2.2F |
A |
| 13. |
''The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants''. This statement is associated with the A. Kinetic theory B. rate law C. atomic theory D. collision theory E. gas laws |
D |
| 14. |
What is the following compounds will not decompose when heated strongly ? A. NaHCO3 B. K2CO3 C. MgCO3 D. Ca(HCO3)2 E. ZnCO3 |
B |
| 15. |
What is the change in the oxidation number of phosphorus in the the reaction represented by the following equation? 4P (s) + 5O(2)(g) → 2P2O5(g) A. 0 to + 2 B. 0 to 5 C. +4 to + 2 D. +4 to +5 E. +4 to +7 |
B |
| 16. |
When iron rusts, it undergoes A. deliquescence B. chemical decomposition C. hydrolysis D. redox reaction E. combustion |
D |
| 17. |
Consider the compounds represented by the following general formula: X2SO4 Y2(SO4)3, 24H2OX and Y could respectively be A. K and AI B. Fe and K C. AI and Fe D. AI and K E. Cr and K |
A |
| 18. |
Which of the following involves the decomposition enzymic action? A. Esterification B. Fermentation C. Dehydration D. Polymerization E. Saponification |
B |
| 19. |
The following salts are readily soluble in water except A. Na2CO3 B. Pb(NO3)2 C. KCI D. CuCO3 E. PbSO4 |
D |
| 20. |
When sucrose is warmed with Fehling's solution A. a silver mirror is produced B. the solution turns milky C. a brick-red precipitate is formed D. there is no precipitate E. a blue coloration is produced |
D |
| 11. |
The scum formed when soap is mixed with hard water could be A. calcium trioxocarbonate (IV) B. propane- 1, 2, 3 - triol C. calcium hydrogentrioxocarbonate (IV) D. magnesium tetraoxosulphate (IV) E. calcium stearate |
A |
| 12. |
What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45 mins? (1F = 96500C) A. 11F B. 0.12F C. 0.22F D. 1.1F E. 2.2F |
A |
| 13. |
''The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants''. This statement is associated with the A. Kinetic theory B. rate law C. atomic theory D. collision theory E. gas laws |
D |
| 14. |
What is the following compounds will not decompose when heated strongly ? A. NaHCO3 B. K2CO3 C. MgCO3 D. Ca(HCO3)2 E. ZnCO3 |
B |
| 15. |
What is the change in the oxidation number of phosphorus in the the reaction represented by the following equation? 4P (s) + 5O(2)(g) → 2P2O5(g) A. 0 to + 2 B. 0 to 5 C. +4 to + 2 D. +4 to +5 E. +4 to +7 |
B |
| 16. |
When iron rusts, it undergoes A. deliquescence B. chemical decomposition C. hydrolysis D. redox reaction E. combustion |
D |
| 17. |
Consider the compounds represented by the following general formula: X2SO4 Y2(SO4)3, 24H2OX and Y could respectively be A. K and AI B. Fe and K C. AI and Fe D. AI and K E. Cr and K |
A |
| 18. |
Which of the following involves the decomposition enzymic action? A. Esterification B. Fermentation C. Dehydration D. Polymerization E. Saponification |
B |
| 19. |
The following salts are readily soluble in water except A. Na2CO3 B. Pb(NO3)2 C. KCI D. CuCO3 E. PbSO4 |
D |
| 20. |
When sucrose is warmed with Fehling's solution A. a silver mirror is produced B. the solution turns milky C. a brick-red precipitate is formed D. there is no precipitate E. a blue coloration is produced |
D |