Year :
1992
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
21 - 30 of 37 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
Which of the following gases will have the highest rate of diffusion under the same conditions? (H = 1, C =12, O = 16, S = 32, CI = 35.5) A. O2 B. CI2 C. HCI D. H2S E. CO2 |
A |
| 22. |
The formula (CH3),3 COH is that of a A. polyhdric alkanol B. secondary alkanol C. tertiary alkanol D. primary alkanol E. trihydric alkanol |
C |
| 23. |
What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10,23 mol-1) A. 3.2 X 10 23 B. 6.0 X 1023 C. 1.2 X 1024 D. 1.6 X 1024 E. 2.0 X 1024 |
C |
| 24. |
Which of the following compounds is not correct about the reaction of sodium material for the manufacture of plastics? A. Ethyne B. Ethane C. Monochloroethene D. Propene E. Butadiene |
B |
| 25. |
The energy required to remove the most loosely bound electron from an atom in the gaseous state is known as the A. bond energy B. ionization energy C. potential energy D. activation energy E. kinetic energy |
B |
| 26. |
Vulcanization of rubber A. stops the growth of fungus on the rubber B. increases the solubility of the rubber C. decreases the elasticity of the rubber D. hardnes the rubber through cross-linkage E. removes sulphur from the rubber |
D |
| 27. |
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information? A. the reaction vessel gets hotter as the reaction proceeds B. ∆H for the reaction is positive C. the rate of the reaction increases with time D. the activation energy of the reaction is high E. the rate of the reaction increases with time |
A |
| 28. |
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information? A. the reaction vessel gets hotter as the reaction proceeds B. ∆H for the reaction is positive C. the rate of the reaction increases with time D. the activation energy of the reaction is high E. the rate of the reaction increases with time |
A |
| 29. |
Which of the following statement is not correct about esterification? A. It is a slow reaction B. the process is reversible C. it is similar to hydrolysis D. it is catalysed by acids E. the products usually have a fruity smell |
C |
| 30. |
Which of the following statements is not correct? The 4s orbital A. is defined by the quantum number 1 = O B. is of higher energy than the 3d orbital C. contains a maximum of two electrons D. is spherical about the nucleus E. is filled before the 4p orbital |
B |
| 21. |
Which of the following gases will have the highest rate of diffusion under the same conditions? (H = 1, C =12, O = 16, S = 32, CI = 35.5) A. O2 B. CI2 C. HCI D. H2S E. CO2 |
A |
| 22. |
The formula (CH3),3 COH is that of a A. polyhdric alkanol B. secondary alkanol C. tertiary alkanol D. primary alkanol E. trihydric alkanol |
C |
| 23. |
What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10,23 mol-1) A. 3.2 X 10 23 B. 6.0 X 1023 C. 1.2 X 1024 D. 1.6 X 1024 E. 2.0 X 1024 |
C |
| 24. |
Which of the following compounds is not correct about the reaction of sodium material for the manufacture of plastics? A. Ethyne B. Ethane C. Monochloroethene D. Propene E. Butadiene |
B |
| 25. |
The energy required to remove the most loosely bound electron from an atom in the gaseous state is known as the A. bond energy B. ionization energy C. potential energy D. activation energy E. kinetic energy |
B |
| 26. |
Vulcanization of rubber A. stops the growth of fungus on the rubber B. increases the solubility of the rubber C. decreases the elasticity of the rubber D. hardnes the rubber through cross-linkage E. removes sulphur from the rubber |
D |
| 27. |
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information? A. the reaction vessel gets hotter as the reaction proceeds B. ∆H for the reaction is positive C. the rate of the reaction increases with time D. the activation energy of the reaction is high E. the rate of the reaction increases with time |
A |
| 28. |
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information? A. the reaction vessel gets hotter as the reaction proceeds B. ∆H for the reaction is positive C. the rate of the reaction increases with time D. the activation energy of the reaction is high E. the rate of the reaction increases with time |
A |
| 29. |
Which of the following statement is not correct about esterification? A. It is a slow reaction B. the process is reversible C. it is similar to hydrolysis D. it is catalysed by acids E. the products usually have a fruity smell |
C |
| 30. |
Which of the following statements is not correct? The 4s orbital A. is defined by the quantum number 1 = O B. is of higher energy than the 3d orbital C. contains a maximum of two electrons D. is spherical about the nucleus E. is filled before the 4p orbital |
B |