Year :
2016
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
31 - 40 of 50 Questions
| # | Question | Ans |
|---|---|---|
| 31. |
The number of electronic shells contained in an atom with electron configuration 1s22s22p63s23p64s2 is A. 3 B. 2 C. 4 D. 5 |
|
| 32. |
The drying agent suitable for drying ammonia is A. Calcium Chloride B. Calcium Oxide C. Phosphorus(V) Oxide D. Concentrated H2SO4 |
|
| 33. |
The arrangement of particles in crystal lattices can be studied using A. X-rays B. \(\beta\)-rays C. \(\alpha\)-rays D. \(\gamma\)-rays |
|
| 34. |
In the extraction of iron, the waste gas from the furnace is a mixture of A. PH3 CO and CO2 B. CO and C C. N2 , CO and CO2 D. PH3 and CO Detailed Solutionthe \(N_2\) from the hot air blast to burn the coke (48%), the \(CO\) (23%) and \(CO_2\) (21%) produced from the reduction of the iron ore \(Fe_{2}O_{3}\) by carbon (the coke) are the major components of the waste from the extraction.There is an explanation video available below. |
|
| 35. |
In a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is A. Blue B. Red C. Orange D. Purple Detailed SolutionNeutral litmus paper is purple. the result of a neutralization reaction is salt and water and hence is neutral.There is an explanation video available below. |
|
| 36. |
An example of a solid emulsion is A. Butter B. Hair cream C. Milk D. Cod-liver oil |
|
| 37. |
An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is A. 16 B. 15 C. 31 D. 46 |
|
| 38. |
Calculate the volume in cm3 of oxygen evolved at s.t.p when a current of 5A is passed through acidified water for 193s? A. 0.056dm3 B. 0.224dm3 C. 224.000dm3 D. 56.000dm3 |
|
| 39. |
The gas that is used for the treatment of cancer is A. Neon B. Radon C. Xenon D. Argon |
|
| 40. |
A chemical reaction in which the hydration energy is greater than the lattice energy is referred to as A. A reversible reaction B. A spontenous reaction C. An endothermic reaction D. An exothermic reaction Detailed SolutionIn salts for which the hydration energy is higher than the lattice energy, solvation occurs with a release of energy in the form of heat. A reaction in which there is a release of energy as LIGHT OR HEAT is EXOTHERMIC.There is an explanation video available below. |
| 31. |
The number of electronic shells contained in an atom with electron configuration 1s22s22p63s23p64s2 is A. 3 B. 2 C. 4 D. 5 |
|
| 32. |
The drying agent suitable for drying ammonia is A. Calcium Chloride B. Calcium Oxide C. Phosphorus(V) Oxide D. Concentrated H2SO4 |
|
| 33. |
The arrangement of particles in crystal lattices can be studied using A. X-rays B. \(\beta\)-rays C. \(\alpha\)-rays D. \(\gamma\)-rays |
|
| 34. |
In the extraction of iron, the waste gas from the furnace is a mixture of A. PH3 CO and CO2 B. CO and C C. N2 , CO and CO2 D. PH3 and CO Detailed Solutionthe \(N_2\) from the hot air blast to burn the coke (48%), the \(CO\) (23%) and \(CO_2\) (21%) produced from the reduction of the iron ore \(Fe_{2}O_{3}\) by carbon (the coke) are the major components of the waste from the extraction.There is an explanation video available below. |
|
| 35. |
In a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is A. Blue B. Red C. Orange D. Purple Detailed SolutionNeutral litmus paper is purple. the result of a neutralization reaction is salt and water and hence is neutral.There is an explanation video available below. |
| 36. |
An example of a solid emulsion is A. Butter B. Hair cream C. Milk D. Cod-liver oil |
|
| 37. |
An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is A. 16 B. 15 C. 31 D. 46 |
|
| 38. |
Calculate the volume in cm3 of oxygen evolved at s.t.p when a current of 5A is passed through acidified water for 193s? A. 0.056dm3 B. 0.224dm3 C. 224.000dm3 D. 56.000dm3 |
|
| 39. |
The gas that is used for the treatment of cancer is A. Neon B. Radon C. Xenon D. Argon |
|
| 40. |
A chemical reaction in which the hydration energy is greater than the lattice energy is referred to as A. A reversible reaction B. A spontenous reaction C. An endothermic reaction D. An exothermic reaction Detailed SolutionIn salts for which the hydration energy is higher than the lattice energy, solvation occurs with a release of energy in the form of heat. A reaction in which there is a release of energy as LIGHT OR HEAT is EXOTHERMIC.There is an explanation video available below. |