Year :
2000
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
11 - 20 of 50 Questions
| # | Question | Ans |
|---|---|---|
| 11. |
Which of the following types of bonding does not involve the formation of new substance? A. Metallic B. covalent C. Co-ordinate D. Electrovalent |
A |
| 12. |
The knowledge of half-life can be used to A. create an element B. detect an element C. split an element D. irradiate an element |
B |
| 13. |
The shapes of CO2, H2O and CH 4 respectively are A. bent, linear and tetrahedral B. bent, tetrahedral and linear C. linear, bent and tetrahedral D. tetrahedral, linear and bent |
C |
| 14. |
The distance between the nuclei of chlorine atoms in a chlorine molecule is 0.194 mm. The atomic radius of chlorine atom is A. 0.097 mm B. 0.194 mm C. 0.388 mm D. 2.388 mm |
A |
| 15. |
The noble gas, argon,is used for A. electric arc welding B. welding brass C. underwater welding D. steel welding |
A |
| 16. |
A side effect of soft water is that A. it gives offensive taste B. excess calcium is precipitated C. it attcaks lead contained in pipes D. it encourages the growth of bacteria |
C |
| 17. |
Water molecule can be ligands especially when they are bonded to A. alkaline earth metals B. alkali metals C. transition metals D. group VII elements |
C |
| 18. |
The air pollutant unknown in nature is A. NO B. CO C. HCHO D. DDT Detailed SolutionFormaldehyde (HCHO) is the most important carcinogen in outdoor air among the 187 hazardous air pollutants (HAPs) identified by the U.S. Environmental Protection Agency (EPA) |
|
| 19. |
1.0 dm3 of distilled water was used to wash 2.0g of a precipitate of AgCl. If the solubility product of AgCl is 2.0 * 10-10mol2dm-6, what quantity of silver was lost in the process? A. 2.029 * 10-3mol dm-3 B. 1.414 * 10-3mol dm-3 C. 2.029 * 10-5mol dm-3 D. 1.414 * 10-5mol dm-3 Detailed SolutionIn order to calculate this, it suffices to calculate the solubility of Ag, so as to know the amount lost.\(K_{sp} = [Ag^{+}][Cl^{-}]\) Let the solubilty of Ag and Cl = d \(2 \times 10^{-10} = d \times d= d^{2}\) \(d = \sqrt{2\times10^{-10}}\) = \(1.414 \times 10^{-5}moldm^{-3}\) |
|
| 20. |
Hydration of ions in solution is associated with A. absorption of heat B. reduction of heat C. conduction of heat D. liberation of heat |
D |
| 11. |
Which of the following types of bonding does not involve the formation of new substance? A. Metallic B. covalent C. Co-ordinate D. Electrovalent |
A |
| 12. |
The knowledge of half-life can be used to A. create an element B. detect an element C. split an element D. irradiate an element |
B |
| 13. |
The shapes of CO2, H2O and CH 4 respectively are A. bent, linear and tetrahedral B. bent, tetrahedral and linear C. linear, bent and tetrahedral D. tetrahedral, linear and bent |
C |
| 14. |
The distance between the nuclei of chlorine atoms in a chlorine molecule is 0.194 mm. The atomic radius of chlorine atom is A. 0.097 mm B. 0.194 mm C. 0.388 mm D. 2.388 mm |
A |
| 15. |
The noble gas, argon,is used for A. electric arc welding B. welding brass C. underwater welding D. steel welding |
A |
| 16. |
A side effect of soft water is that A. it gives offensive taste B. excess calcium is precipitated C. it attcaks lead contained in pipes D. it encourages the growth of bacteria |
C |
| 17. |
Water molecule can be ligands especially when they are bonded to A. alkaline earth metals B. alkali metals C. transition metals D. group VII elements |
C |
| 18. |
The air pollutant unknown in nature is A. NO B. CO C. HCHO D. DDT Detailed SolutionFormaldehyde (HCHO) is the most important carcinogen in outdoor air among the 187 hazardous air pollutants (HAPs) identified by the U.S. Environmental Protection Agency (EPA) |
|
| 19. |
1.0 dm3 of distilled water was used to wash 2.0g of a precipitate of AgCl. If the solubility product of AgCl is 2.0 * 10-10mol2dm-6, what quantity of silver was lost in the process? A. 2.029 * 10-3mol dm-3 B. 1.414 * 10-3mol dm-3 C. 2.029 * 10-5mol dm-3 D. 1.414 * 10-5mol dm-3 Detailed SolutionIn order to calculate this, it suffices to calculate the solubility of Ag, so as to know the amount lost.\(K_{sp} = [Ag^{+}][Cl^{-}]\) Let the solubilty of Ag and Cl = d \(2 \times 10^{-10} = d \times d= d^{2}\) \(d = \sqrt{2\times10^{-10}}\) = \(1.414 \times 10^{-5}moldm^{-3}\) |
|
| 20. |
Hydration of ions in solution is associated with A. absorption of heat B. reduction of heat C. conduction of heat D. liberation of heat |
D |