Year :
2012
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
11 - 20 of 45 Questions
| # | Question | Ans |
|---|---|---|
| 11. |
Which of the following is used to study the arrangement of particles in crystal lattices? A. Alpha-particles B. Beta-particles C. Gamma-rays D. X-rays |
|
| 12. |
I. It has a varied composition from one place to another. ll. it constituents can be separated by physical means A. I and ll only B. ll and lll only C. l and lll only D. l,lll and lll |
|
| 13. |
The chemicals used to soften hard water involves the addition of A. insoluble sodium compounds which from soluble solutions of calcium and magesium B. solube soudium compounds which from soluble solutions of calcium and magnesium ions C. solube sodium compounds which from insoluble precipitates of calcium and magnesium ions D. insoluble precipitates of calcium and magnesium ions |
|
| 14. |
Chlorination of water for town supply is carried out to A. make the water colourless B. remove germs from the water C. make the water tastedful D. remove odour from the water |
|
| 15. |
The solubilites of different solutes in a given solvent can be compared by A. plotting their solubility curves on separete axes B. plotting their solubility curves on the same axes C. plotting some of the solubility curves on the x-axis and others on the y-axis D. plotting their solubility curves on the x-axis only |
|
| 16. |
Potassium trioxochlorate (V)has a solubility of 1.5 mol dm -3 at 45 oC.On cooling this solution to a temperature of 20 oC, the solubility was found to be 0.5 mol dm -3. What mass of KCIO 3 was crystalized out? A. 1.00g B. 10.00g C. 12.25g D. 122.50g |
|
| 17. |
Which of the following pollutants is associated with brain damage? A. Carbon (ll) oxide B. Radioactive fallout C. Biodegradable waste D. Sulphus (lV) oxide |
|
| 18. |
Which of the following will produce a solution with pH less than 7 at equivalent point? A. HNO 3 +NaOH B. H 2SO 4 + KOH C. HCL +Mg (OH) 2 D. HNO 3 + KOH |
|
| 19. |
The number of hydroxonium ions produced by one molecule of an acid in aqueous solution is its A. basicity B. acid strength C. pH D. concentration Detailed SolutionThe basicity of an acid is the number of replaceable Hydrogen ions, \(H^+\), or Hydroxonium ion, \(H_{3}O^{+}\) in one molecule of the acid.There is an explanation video available below. |
|
| 20. |
During a titration experiment, 0.05 moles of carbon (lV) oxide is liberated. What is the volume of gas liberated? A. 22.40 dm 3 B. 11.20 dm 3 C. 2.24 dm 3 D. 1.12 dm 3 |
| 11. |
Which of the following is used to study the arrangement of particles in crystal lattices? A. Alpha-particles B. Beta-particles C. Gamma-rays D. X-rays |
|
| 12. |
I. It has a varied composition from one place to another. ll. it constituents can be separated by physical means A. I and ll only B. ll and lll only C. l and lll only D. l,lll and lll |
|
| 13. |
The chemicals used to soften hard water involves the addition of A. insoluble sodium compounds which from soluble solutions of calcium and magesium B. solube soudium compounds which from soluble solutions of calcium and magnesium ions C. solube sodium compounds which from insoluble precipitates of calcium and magnesium ions D. insoluble precipitates of calcium and magnesium ions |
|
| 14. |
Chlorination of water for town supply is carried out to A. make the water colourless B. remove germs from the water C. make the water tastedful D. remove odour from the water |
|
| 15. |
The solubilites of different solutes in a given solvent can be compared by A. plotting their solubility curves on separete axes B. plotting their solubility curves on the same axes C. plotting some of the solubility curves on the x-axis and others on the y-axis D. plotting their solubility curves on the x-axis only |
| 16. |
Potassium trioxochlorate (V)has a solubility of 1.5 mol dm -3 at 45 oC.On cooling this solution to a temperature of 20 oC, the solubility was found to be 0.5 mol dm -3. What mass of KCIO 3 was crystalized out? A. 1.00g B. 10.00g C. 12.25g D. 122.50g |
|
| 17. |
Which of the following pollutants is associated with brain damage? A. Carbon (ll) oxide B. Radioactive fallout C. Biodegradable waste D. Sulphus (lV) oxide |
|
| 18. |
Which of the following will produce a solution with pH less than 7 at equivalent point? A. HNO 3 +NaOH B. H 2SO 4 + KOH C. HCL +Mg (OH) 2 D. HNO 3 + KOH |
|
| 19. |
The number of hydroxonium ions produced by one molecule of an acid in aqueous solution is its A. basicity B. acid strength C. pH D. concentration Detailed SolutionThe basicity of an acid is the number of replaceable Hydrogen ions, \(H^+\), or Hydroxonium ion, \(H_{3}O^{+}\) in one molecule of the acid.There is an explanation video available below. |
|
| 20. |
During a titration experiment, 0.05 moles of carbon (lV) oxide is liberated. What is the volume of gas liberated? A. 22.40 dm 3 B. 11.20 dm 3 C. 2.24 dm 3 D. 1.12 dm 3 |