Year :
1988
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
1 - 10 of 45 Questions
| # | Question | Ans |
|---|---|---|
| 1. |
Which of the following statements is NOT correct? A. The average kinetic energy of a gas is directly proportional to its temperature B. At constant tempearture, the volume of a gas increases as the pressure increases C. The pressure of a gas is inversely proportional to its volume D. The temperature of a gas is directly proportional to its volume E. The collisions of molecules with each other are elastic Detailed SolutionBoyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship. If volume increases, then pressure decreases. |
|
| 2. |
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is? A. Mg+ B. K+ C. CO22- D. HCO3 Detailed SolutionCalcium and magnesium ions (particularly calcium) negatively influence cleansing power of detergents, because these form nearly insoluble salts with soap. When the water lathers readily, it means these ions are in negligible concentration in the water. |
|
| 3. |
A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R? A. S dissolves in the solution B. crystals of R are precipitated C. there is no observable change D. R and S react to generate heat |
B |
| 4. |
Which of the following dilute solutions has the lowest pH value? A. Calcium trioxocarbonate (IV) B. Sodium trioxocarbonate (IV) C. Hydrochloric acid D. Ethanoic acid |
C |
| 5. |
Which of the following in aqueous solution is neutral to litmus? A. NH4CI B. NaCO3 C. FeCl3 D. NaCl |
D |
| 6. |
What volume of a 0.1 M H3PO4 will be required to neutralize 45.0 cm3 of a 0.2 M NaOH? A. 10.0 cm3 B. 20.0 cm3 C. 27.0 cm3 D. 30.0 cm3 |
D |
| 7. |
Which of the following substances is a basic salt? A. Na2CO3 B. Mg(OH)CI C. NaHCO3 D. KSO4.AI2(SO4)3,24H2O |
B |
| 8. |
Which of the following acts both s a reducing and an oxidizing agent? A. H2 B. SO2 C. H2S D. C Detailed SolutionSO2 = i.eIn H2SO2 act as oxidizing agent H2S + SO2 → 3S + 2H2O Whereas in water SO2 acts as reducing agents H2O + SO2 H2SO23 |
|
| 9. |
Which of the following reactions takes place in the cathode compartment during the electrolysis of copper (II) chloride solution? A. Cu2+ + 2e- → Cu(s) B. 2Cl- -2e → Cl2 C. Cu(s) -2e → Cu2+(aq) D. Cu2+(aq) + 2Cl-(aq) → CuCl2(aq) |
A |
| 10. |
A mixture of starch solution and potassium iodide was placed in a test tube. On adding dilute tetraoxosulphate (lV) acid and then K2Cr2O7 solutions, a blue-black colour was produced. In this reaction, the? A. iodide is oxidized B. tetraoxosulphate (Vl) acid acts as an oxidizing agent C. starch has been oxidized D. K2Cr2O7 is oxidized |
C |
| 1. |
Which of the following statements is NOT correct? A. The average kinetic energy of a gas is directly proportional to its temperature B. At constant tempearture, the volume of a gas increases as the pressure increases C. The pressure of a gas is inversely proportional to its volume D. The temperature of a gas is directly proportional to its volume E. The collisions of molecules with each other are elastic Detailed SolutionBoyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship. If volume increases, then pressure decreases. |
|
| 2. |
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is? A. Mg+ B. K+ C. CO22- D. HCO3 Detailed SolutionCalcium and magnesium ions (particularly calcium) negatively influence cleansing power of detergents, because these form nearly insoluble salts with soap. When the water lathers readily, it means these ions are in negligible concentration in the water. |
|
| 3. |
A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R? A. S dissolves in the solution B. crystals of R are precipitated C. there is no observable change D. R and S react to generate heat |
B |
| 4. |
Which of the following dilute solutions has the lowest pH value? A. Calcium trioxocarbonate (IV) B. Sodium trioxocarbonate (IV) C. Hydrochloric acid D. Ethanoic acid |
C |
| 5. |
Which of the following in aqueous solution is neutral to litmus? A. NH4CI B. NaCO3 C. FeCl3 D. NaCl |
D |
| 6. |
What volume of a 0.1 M H3PO4 will be required to neutralize 45.0 cm3 of a 0.2 M NaOH? A. 10.0 cm3 B. 20.0 cm3 C. 27.0 cm3 D. 30.0 cm3 |
D |
| 7. |
Which of the following substances is a basic salt? A. Na2CO3 B. Mg(OH)CI C. NaHCO3 D. KSO4.AI2(SO4)3,24H2O |
B |
| 8. |
Which of the following acts both s a reducing and an oxidizing agent? A. H2 B. SO2 C. H2S D. C Detailed SolutionSO2 = i.eIn H2SO2 act as oxidizing agent H2S + SO2 → 3S + 2H2O Whereas in water SO2 acts as reducing agents H2O + SO2 H2SO23 |
|
| 9. |
Which of the following reactions takes place in the cathode compartment during the electrolysis of copper (II) chloride solution? A. Cu2+ + 2e- → Cu(s) B. 2Cl- -2e → Cl2 C. Cu(s) -2e → Cu2+(aq) D. Cu2+(aq) + 2Cl-(aq) → CuCl2(aq) |
A |
| 10. |
A mixture of starch solution and potassium iodide was placed in a test tube. On adding dilute tetraoxosulphate (lV) acid and then K2Cr2O7 solutions, a blue-black colour was produced. In this reaction, the? A. iodide is oxidized B. tetraoxosulphate (Vl) acid acts as an oxidizing agent C. starch has been oxidized D. K2Cr2O7 is oxidized |
C |