Year :
2003
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
1 - 10 of 48 Questions
| # | Question | Ans |
|---|---|---|
| 1. |
What volume of oxygen is produced from the decomposition of 2 mole of KCIO3 at s.t.p? A. 22.4 dm3 B. 33.6 dm3 C. 44.8 dm3 D. 67.2 dm3 Detailed Solution2KClO3 → 2KCl + 3O23 moles of oxygen is produced 1 moles of oxygen is 22.4 dm3 3 moles of oxygen is 67.2 dm3 |
|
| 2. |
Which of the following is physical change? A. Burning kerosene B. Freezing ice cream C. Exposing white phosphorus D. Dissolving calcium in water |
B |
| 3. |
What is the percentage by mass of oxygen in Al2(SO4)3. 2H2O? A. 14.29% B. 25.39% C. 50.79% D. 59.25% Detailed SolutionAl2(SO4)3. 2H2O2 * 27 + 3*32 + 14 * 16 + 4 * 1 = 54 + 96 + 224 + 4 = 378 % O2 = (224/378) * (100/1) = 59.25% |
|
| 4. |
The filter in the cigarette reduces the nicotine content by A. Burning B. Adsorption C. Evaporation D. Absorption |
B |
| 5. |
3Cu + pHNO3 →3Cu(NO A. 1 and 3 B. 2 and 3 C. 6 and 2 D. 8 and 2 |
D |
| 6. |
Neutral atoms of neon with atomic number 10 have the same number of electron as A. O2+ B. Ca2+ C. K+ D. Mg2+ |
D |
| 7. |
The noble gases owe their inactivity to A. Octet configuration B. Cyclic shape C. Hexagonal shape D. Obtuse configuration |
A |
| 8. |
According to the kinetic theory, an increase in temperature causes the kinetic energy of particles to A. Decrease B. Increase C. Remain constant D. Be zero |
B |
| 9. |
I. H = 1s1 II. N = 1s2 2s2 p3 III. O = 1s2 2s2 p4 IV. Zn = 1s2 2s2 2p6 3s2 3p6 4s2 3d10 A. I and II B. I and III C. I and IV D. III and IV |
A |
| 10. |
A gas exerts pressure on its container because A. some of its molecules are moving faster than others B. of the collision of the molecules with each other C. of the mass of the molecules of gas D. the molecules of a gas colide with the walls of the container |
D |
| 1. |
What volume of oxygen is produced from the decomposition of 2 mole of KCIO3 at s.t.p? A. 22.4 dm3 B. 33.6 dm3 C. 44.8 dm3 D. 67.2 dm3 Detailed Solution2KClO3 → 2KCl + 3O23 moles of oxygen is produced 1 moles of oxygen is 22.4 dm3 3 moles of oxygen is 67.2 dm3 |
|
| 2. |
Which of the following is physical change? A. Burning kerosene B. Freezing ice cream C. Exposing white phosphorus D. Dissolving calcium in water |
B |
| 3. |
What is the percentage by mass of oxygen in Al2(SO4)3. 2H2O? A. 14.29% B. 25.39% C. 50.79% D. 59.25% Detailed SolutionAl2(SO4)3. 2H2O2 * 27 + 3*32 + 14 * 16 + 4 * 1 = 54 + 96 + 224 + 4 = 378 % O2 = (224/378) * (100/1) = 59.25% |
|
| 4. |
The filter in the cigarette reduces the nicotine content by A. Burning B. Adsorption C. Evaporation D. Absorption |
B |
| 5. |
3Cu + pHNO3 →3Cu(NO A. 1 and 3 B. 2 and 3 C. 6 and 2 D. 8 and 2 |
D |
| 6. |
Neutral atoms of neon with atomic number 10 have the same number of electron as A. O2+ B. Ca2+ C. K+ D. Mg2+ |
D |
| 7. |
The noble gases owe their inactivity to A. Octet configuration B. Cyclic shape C. Hexagonal shape D. Obtuse configuration |
A |
| 8. |
According to the kinetic theory, an increase in temperature causes the kinetic energy of particles to A. Decrease B. Increase C. Remain constant D. Be zero |
B |
| 9. |
I. H = 1s1 II. N = 1s2 2s2 p3 III. O = 1s2 2s2 p4 IV. Zn = 1s2 2s2 2p6 3s2 3p6 4s2 3d10 A. I and II B. I and III C. I and IV D. III and IV |
A |
| 10. |
A gas exerts pressure on its container because A. some of its molecules are moving faster than others B. of the collision of the molecules with each other C. of the mass of the molecules of gas D. the molecules of a gas colide with the walls of the container |
D |