Year :
2003
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
21 - 30 of 37 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
Determine the amount of electrons needed to deposit 6.4g of copper during the electrolysis of copper (ll) tetraoxosulphate (IV) solution [Cu = 64] A. 0.10 mole B. 0.20 mole C. 1.0 mole D. 2.0 mole |
B |
| 22. |
A given fuel has an octane number of 100. This means that A. the knocking tendency of the fuel is low B. the fuel is a mixture of several hydrocarbons C. a large amount of alkanes is present in the fuel D. the fuel needs to be cracked before use |
A |
| 23. |
The equation for the reaction at the anode during the electrolysis of concentrated sodium chloride solution is A. 2CI- (aq) → CI,sub>2(g) + 2e- B. 40H-(aq) → 2H2O(I) + O2(g) + 4e - C. Na+(aq) + e- → Na(s) D. 2H+(aq) + 2e- → H2(g) |
A |
| 24. |
Which of the following compounds has the same empirical formula as benzene? A. C2H2 B. C2H4 C. C4H6 D. C6H12 |
A |
| 25. |
A given fuel has an octane number of 100. This means that A. the knocking tendency of the fuel is low B. the fuel is a mixture of several hydrocarbons C. a large amount of alkanes is present in the fuel D. the fuel needs to be cracked before use |
A |
| 26. |
Wine containing 8% to 17% ethanol can be converted to gin containing about 40% ethanol by A. evaporation B. distilation C. fermentation D. oxidation |
B |
| 27. |
Which of the following substances could be responsible for the banana taste of a food flavour? A. Methylbenzene B. Butanol C. Ethanol D. Pentylethanoate |
D |
| 28. |
What is the organic product of the reaction of C2H 5OH with excess acidified K 2Cr 2O7(aq)? A. CH3COOH B. C2H5OC2H5 C. HCOOCH 3 D. C2H5CHO |
A |
| 29. |
The reaction of vegetable oil with a solution of wood ash is A. saponification B. neutralization C. hydrogenation D. esterification |
A |
| 30. |
What process does the following equation represent ? (C 6H 10O 5) + nH2O → nC6H 12O?6 A. Polymerization of glucose B. Hydrolysis of starch C. Fermentation of sugar D. Dehydration of carbohydates |
B |
| 21. |
Determine the amount of electrons needed to deposit 6.4g of copper during the electrolysis of copper (ll) tetraoxosulphate (IV) solution [Cu = 64] A. 0.10 mole B. 0.20 mole C. 1.0 mole D. 2.0 mole |
B |
| 22. |
A given fuel has an octane number of 100. This means that A. the knocking tendency of the fuel is low B. the fuel is a mixture of several hydrocarbons C. a large amount of alkanes is present in the fuel D. the fuel needs to be cracked before use |
A |
| 23. |
The equation for the reaction at the anode during the electrolysis of concentrated sodium chloride solution is A. 2CI- (aq) → CI,sub>2(g) + 2e- B. 40H-(aq) → 2H2O(I) + O2(g) + 4e - C. Na+(aq) + e- → Na(s) D. 2H+(aq) + 2e- → H2(g) |
A |
| 24. |
Which of the following compounds has the same empirical formula as benzene? A. C2H2 B. C2H4 C. C4H6 D. C6H12 |
A |
| 25. |
A given fuel has an octane number of 100. This means that A. the knocking tendency of the fuel is low B. the fuel is a mixture of several hydrocarbons C. a large amount of alkanes is present in the fuel D. the fuel needs to be cracked before use |
A |
| 26. |
Wine containing 8% to 17% ethanol can be converted to gin containing about 40% ethanol by A. evaporation B. distilation C. fermentation D. oxidation |
B |
| 27. |
Which of the following substances could be responsible for the banana taste of a food flavour? A. Methylbenzene B. Butanol C. Ethanol D. Pentylethanoate |
D |
| 28. |
What is the organic product of the reaction of C2H 5OH with excess acidified K 2Cr 2O7(aq)? A. CH3COOH B. C2H5OC2H5 C. HCOOCH 3 D. C2H5CHO |
A |
| 29. |
The reaction of vegetable oil with a solution of wood ash is A. saponification B. neutralization C. hydrogenation D. esterification |
A |
| 30. |
What process does the following equation represent ? (C 6H 10O 5) + nH2O → nC6H 12O?6 A. Polymerization of glucose B. Hydrolysis of starch C. Fermentation of sugar D. Dehydration of carbohydates |
B |