Year :
2013
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
21 - 30 of 47 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
The percentage by mass of calcium in Ca(OCI)2 is [Ca = 40.0; CI = 35.5; O = 16.0] A. 28.0% B. 31.6% C. 43.8% D. 44.5% |
A |
| 22. |
The gas law which describes the relationship between volume and temperature is A. Boyle's law B. Charles' law C. Dalton's law D. Graham's law |
B |
| 23. |
Which of the following phenomenna lead to decrease in volume of a liquid in an open container? A. Brownian motion B. Diffusion C. Evaporation D. Sublimation |
C |
| 24. |
The pressure exerted by a gas is a function of the A. total volume of the gas B. speed of the gaseous molecules C. mass of each gaseous molecule D. frequency of collision between gaseous molecules |
D |
| 25. |
Which of the following gases are arranged in increasing order of diffusion rate? [H = 1 .0; C = 12; N = 14; O = 16; S = 32] A. SO 2 O2, NH3 H2 B. H2S,NH2,O2,SO2 C. CO2,N2O,O2,SO2 D. NH3,NO2,N2,CO2 |
A |
| 26. |
Which of the following variables is a measure of the average kinetic energy of the molecule of a gas? A. Density B. Pressure C. Temperature D. Volume |
C |
| 27. |
When heat is absorbed during a chemical reaction, the reaction is said to be A. adiabatic B. endothermic C. exothermic D. isothermal |
B |
| 28. |
The aqueous solution which has pH > 7 is A. FeCI3(aq) B. CuSO4(aq) C. KNO3(aq) D. Na2CO3(aq) |
D |
| 29. |
Which of the following acids would readily react with CaCO3 to liberate CO2? A. CH3COOH B. H2SO4 C. H2SO3 D. HNO3 Detailed SolutionH2SO4(aq)+CaCO3(aq)→CaSO4(aq)+CO2(g)+H2O(l) |
|
| 30. |
Which of the following compounds crystallizes without water of crystallization? A. MgSO4 B. Na2CO3 C. NaCI D. FeSO4 |
C |
| 21. |
The percentage by mass of calcium in Ca(OCI)2 is [Ca = 40.0; CI = 35.5; O = 16.0] A. 28.0% B. 31.6% C. 43.8% D. 44.5% |
A |
| 22. |
The gas law which describes the relationship between volume and temperature is A. Boyle's law B. Charles' law C. Dalton's law D. Graham's law |
B |
| 23. |
Which of the following phenomenna lead to decrease in volume of a liquid in an open container? A. Brownian motion B. Diffusion C. Evaporation D. Sublimation |
C |
| 24. |
The pressure exerted by a gas is a function of the A. total volume of the gas B. speed of the gaseous molecules C. mass of each gaseous molecule D. frequency of collision between gaseous molecules |
D |
| 25. |
Which of the following gases are arranged in increasing order of diffusion rate? [H = 1 .0; C = 12; N = 14; O = 16; S = 32] A. SO 2 O2, NH3 H2 B. H2S,NH2,O2,SO2 C. CO2,N2O,O2,SO2 D. NH3,NO2,N2,CO2 |
A |
| 26. |
Which of the following variables is a measure of the average kinetic energy of the molecule of a gas? A. Density B. Pressure C. Temperature D. Volume |
C |
| 27. |
When heat is absorbed during a chemical reaction, the reaction is said to be A. adiabatic B. endothermic C. exothermic D. isothermal |
B |
| 28. |
The aqueous solution which has pH > 7 is A. FeCI3(aq) B. CuSO4(aq) C. KNO3(aq) D. Na2CO3(aq) |
D |
| 29. |
Which of the following acids would readily react with CaCO3 to liberate CO2? A. CH3COOH B. H2SO4 C. H2SO3 D. HNO3 Detailed SolutionH2SO4(aq)+CaCO3(aq)→CaSO4(aq)+CO2(g)+H2O(l) |
|
| 30. |
Which of the following compounds crystallizes without water of crystallization? A. MgSO4 B. Na2CO3 C. NaCI D. FeSO4 |
C |