Year :
2011
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
21 - 30 of 46 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
Which of the following statements about a molar solution is correct? it A. is a supersaturated solution B. cannot dissolve more of the solute at that temperature C. contains any amount of solute in a given volume of solution D. contains one mole of the solute in 1 dm3 of solution |
D |
| 22. |
A gas that is collected by upward delivery is likely to be A. heavier than air B. insoluble in water C. lighter than air D. soluble in water |
C |
| 23. |
Bubbling excess carbon (IV) oxide into calcium hydroxide solution results in the formaton of A. CaO B. Ca(HCO3)2 C. H2CO3 D. CaCO3 |
B |
| 24. |
The equation P = \(\frac{K}{V}\) illustrates A. Boyle's law B. Charles' law C. Dalton's law D. Gay Lussac's law |
A |
| 25. |
The initial volume of a gas at 300 K was 220 cm 3 Determine its temperature if the volume became 250 cm 3 A. 183 K B. 264 K C. 300 K D. 341 K |
D |
| 26. |
Which of the following equimolar solutions has the highest conductivity? A. CH3COOH(aq) B. H2CO3(aq) C. H 2SO 4(aq) D. NaOH (aq) |
C |
| 27. |
The colour of phenolphthalein indicator in alkaline solution at the end-point of an acid-base titration is? A. colourless B. orange C. pink D. yellow Detailed SolutionPhenolphthalein is one of the most commonly-used indicators in neutralisation titration.Phenolphthalein is naturally colorless but turns pink in alkaline solutions. |
|
| 28. |
Which of the following statements about enthalpy of neutralization is correct? It A. is constant for a strong acid and a strong base B. cannot be determined using calorimeter C. has a positive value D. is higher for strong acid and a weak base |
A |
| 29. |
When NH 4CI was dissolved in water, the container was cold to touch. This implies that A. the process is endothermic B. the process is exothermic C. NH4CI is highly soluble in water D. NH 4CI forms a saturated solution |
A |
| 30. |
Which of the following metallic oxides is amphoteric? A. AI2O3 B. Fe2O3 C. MgO D. Na2O |
A |
| 21. |
Which of the following statements about a molar solution is correct? it A. is a supersaturated solution B. cannot dissolve more of the solute at that temperature C. contains any amount of solute in a given volume of solution D. contains one mole of the solute in 1 dm3 of solution |
D |
| 22. |
A gas that is collected by upward delivery is likely to be A. heavier than air B. insoluble in water C. lighter than air D. soluble in water |
C |
| 23. |
Bubbling excess carbon (IV) oxide into calcium hydroxide solution results in the formaton of A. CaO B. Ca(HCO3)2 C. H2CO3 D. CaCO3 |
B |
| 24. |
The equation P = \(\frac{K}{V}\) illustrates A. Boyle's law B. Charles' law C. Dalton's law D. Gay Lussac's law |
A |
| 25. |
The initial volume of a gas at 300 K was 220 cm 3 Determine its temperature if the volume became 250 cm 3 A. 183 K B. 264 K C. 300 K D. 341 K |
D |
| 26. |
Which of the following equimolar solutions has the highest conductivity? A. CH3COOH(aq) B. H2CO3(aq) C. H 2SO 4(aq) D. NaOH (aq) |
C |
| 27. |
The colour of phenolphthalein indicator in alkaline solution at the end-point of an acid-base titration is? A. colourless B. orange C. pink D. yellow Detailed SolutionPhenolphthalein is one of the most commonly-used indicators in neutralisation titration.Phenolphthalein is naturally colorless but turns pink in alkaline solutions. |
|
| 28. |
Which of the following statements about enthalpy of neutralization is correct? It A. is constant for a strong acid and a strong base B. cannot be determined using calorimeter C. has a positive value D. is higher for strong acid and a weak base |
A |
| 29. |
When NH 4CI was dissolved in water, the container was cold to touch. This implies that A. the process is endothermic B. the process is exothermic C. NH4CI is highly soluble in water D. NH 4CI forms a saturated solution |
A |
| 30. |
Which of the following metallic oxides is amphoteric? A. AI2O3 B. Fe2O3 C. MgO D. Na2O |
A |