Year :
1996
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
11 - 20 of 36 Questions
| # | Question | Ans |
|---|---|---|
| 11. |
An arrangement of two different metals in aqueous solutions of their salts to produce an electronic current is known as A. electrochemical cell B. activity series C. thermocouple D. voltameter E. galvanometer |
A |
| 12. |
In which of the following compounds is the oxidation number of nitrogen equal to + 3? A. NO 2 B. N 2O C. NO D. HNO2 E. HNO3 |
D |
| 13. |
Which of the following statements is not correct about electrolysis? A. Reduction occurs at the anode B. Anions migrate to the anode C. Positive ions migrate to the cathode D. Concentration affects the discharge of ions E. Electrolytes conduct electric current |
A |
| 14. |
Which of the following is not correct about a catalyst? It A. remains unchanged chemically at the end of a reaction B. helps to establish equilibrium faster reversible reaction C. can start a chemical rection which will normally not take place D. is usually specific in its action E. alters the rate of chemical reaction |
C |
| 15. |
The rate of production of hydrogen gas from the reaction between zinc granules and hydrochloric acid can be increased by A. cooling the reaction mixture B. using zinc powder instead of zinc granules C. using zinc rod instead of zinc granules D. carrying out the reaction at a higher pressure E. carrying out the reaction in a closed vessel |
B |
| 16. |
What does X represent in the following equation? H 2(g) + 1/2O2(g) → H2O (l); ∆H = xKJ. A. Bond energy B. Activation energy C. Ionization energy D. Enthalpy of neutralization E. Enthalpy of formation |
E |
| 17. |
If the third member of a homologous series is C3H8, the fifth member will be A. C 5H8 B. C5H9 C. C5H10 D. C5H11 E. C5H12 |
E |
| 18. |
Which of the following exhibits resonance? A. Benzene B. Butane C. Pentene D. Octana E. Hexene |
A |
| 19. |
On exposing palm wine to air for some days, it becomes sour owing to the conversion of A. glucose to ethanol B. glucose to gluconic acid C. ethanol to ethanoic acid D. ethanol to ethanal E. palm wine to palmitic acid |
C |
| 20. |
When acidified KMnO4 solution is decolorised by ethene, the gas acts as A. a straight-chain hydrocarbon B. a saturated hydrocarbon C. a reducing agent D. a dehydrating agent E. an oxidizing agent |
C |
| 11. |
An arrangement of two different metals in aqueous solutions of their salts to produce an electronic current is known as A. electrochemical cell B. activity series C. thermocouple D. voltameter E. galvanometer |
A |
| 12. |
In which of the following compounds is the oxidation number of nitrogen equal to + 3? A. NO 2 B. N 2O C. NO D. HNO2 E. HNO3 |
D |
| 13. |
Which of the following statements is not correct about electrolysis? A. Reduction occurs at the anode B. Anions migrate to the anode C. Positive ions migrate to the cathode D. Concentration affects the discharge of ions E. Electrolytes conduct electric current |
A |
| 14. |
Which of the following is not correct about a catalyst? It A. remains unchanged chemically at the end of a reaction B. helps to establish equilibrium faster reversible reaction C. can start a chemical rection which will normally not take place D. is usually specific in its action E. alters the rate of chemical reaction |
C |
| 15. |
The rate of production of hydrogen gas from the reaction between zinc granules and hydrochloric acid can be increased by A. cooling the reaction mixture B. using zinc powder instead of zinc granules C. using zinc rod instead of zinc granules D. carrying out the reaction at a higher pressure E. carrying out the reaction in a closed vessel |
B |
| 16. |
What does X represent in the following equation? H 2(g) + 1/2O2(g) → H2O (l); ∆H = xKJ. A. Bond energy B. Activation energy C. Ionization energy D. Enthalpy of neutralization E. Enthalpy of formation |
E |
| 17. |
If the third member of a homologous series is C3H8, the fifth member will be A. C 5H8 B. C5H9 C. C5H10 D. C5H11 E. C5H12 |
E |
| 18. |
Which of the following exhibits resonance? A. Benzene B. Butane C. Pentene D. Octana E. Hexene |
A |
| 19. |
On exposing palm wine to air for some days, it becomes sour owing to the conversion of A. glucose to ethanol B. glucose to gluconic acid C. ethanol to ethanoic acid D. ethanol to ethanal E. palm wine to palmitic acid |
C |
| 20. |
When acidified KMnO4 solution is decolorised by ethene, the gas acts as A. a straight-chain hydrocarbon B. a saturated hydrocarbon C. a reducing agent D. a dehydrating agent E. an oxidizing agent |
C |