Year :
1978
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
21 - 30 of 48 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
Which of the following gases may not be dried with concentrated sulphuric acid? A. HCl B. N2 C. Cl2 D. SO2 E. NH3 |
E |
| 22. |
Which of the following reactions does not take place in the smelting of iron in a blast furnace? A. CaCO3(s) B. C(s) + O2(g) C. 3FeCO(s) + 2OCO2(g) D. SiO2(s) + CaO(s) E. CO2(g) + C(s) |
C |
| 23. |
Which of the following is not a member of the homologous series of the paraffins (alkanes)? A. C3H8 B. C5H12 C. C7H16 D. C15H32 E. C24H48 |
E |
| 24. |
When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called A. ionic bond B. electrovalent bond C. covalent bond D. co-ordinate bond E. hydrogen bond |
D |
| 25. |
An example of an alcohol is A. CCl4 B. CH3COOH C. CHCl3 D. C2H6 E. CH3OH |
E |
| 26. |
The nucleus of an atom contains A. protons only B. neurons only C. protons and electrons D. neutrons and electrons E. protons and neutrons |
E |
| 27. |
Hypochlorous acid is used as a bleach because A. it is a strong acid B. it yields chlorine readily in pure water C. it is an oxidising agent D. it is a weak acid E. it is a reducing agent |
C |
| 28. |
The normal boiling point of a liquid is defined as A. the temperature at which its vapour pressure equals the atmospheric pressure B. the temperature at which bubbles begin to form C. the temperature at which the vapour pressure equals 1 temperature D. the temperature at which the rate of condensation of vapour equals the rate of vaporisation of the liquid E. the temperature at which the space above the liquid is saturated Detailed SolutionThe boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor. |
|
| 29. |
Which of the following compounds will form a solution if exposed to air? A. Na2CO3.10H2O B. NaNO3 C. CuSO4 D. CaCl2 E. Na2SO4.10H2O Detailed SolutionCalcium chloride is a deliquescent substance. It attracts water from the atmosphere and then forms a solution. |
|
| 30. |
The most common type of chemical reaction which alkanes undergo is A. substitution B. addition C. condensation D. polymerisation E. double decomposition |
A |
| 21. |
Which of the following gases may not be dried with concentrated sulphuric acid? A. HCl B. N2 C. Cl2 D. SO2 E. NH3 |
E |
| 22. |
Which of the following reactions does not take place in the smelting of iron in a blast furnace? A. CaCO3(s) B. C(s) + O2(g) C. 3FeCO(s) + 2OCO2(g) D. SiO2(s) + CaO(s) E. CO2(g) + C(s) |
C |
| 23. |
Which of the following is not a member of the homologous series of the paraffins (alkanes)? A. C3H8 B. C5H12 C. C7H16 D. C15H32 E. C24H48 |
E |
| 24. |
When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called A. ionic bond B. electrovalent bond C. covalent bond D. co-ordinate bond E. hydrogen bond |
D |
| 25. |
An example of an alcohol is A. CCl4 B. CH3COOH C. CHCl3 D. C2H6 E. CH3OH |
E |
| 26. |
The nucleus of an atom contains A. protons only B. neurons only C. protons and electrons D. neutrons and electrons E. protons and neutrons |
E |
| 27. |
Hypochlorous acid is used as a bleach because A. it is a strong acid B. it yields chlorine readily in pure water C. it is an oxidising agent D. it is a weak acid E. it is a reducing agent |
C |
| 28. |
The normal boiling point of a liquid is defined as A. the temperature at which its vapour pressure equals the atmospheric pressure B. the temperature at which bubbles begin to form C. the temperature at which the vapour pressure equals 1 temperature D. the temperature at which the rate of condensation of vapour equals the rate of vaporisation of the liquid E. the temperature at which the space above the liquid is saturated Detailed SolutionThe boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor. |
|
| 29. |
Which of the following compounds will form a solution if exposed to air? A. Na2CO3.10H2O B. NaNO3 C. CuSO4 D. CaCl2 E. Na2SO4.10H2O Detailed SolutionCalcium chloride is a deliquescent substance. It attracts water from the atmosphere and then forms a solution. |
|
| 30. |
The most common type of chemical reaction which alkanes undergo is A. substitution B. addition C. condensation D. polymerisation E. double decomposition |
A |