Year :
2015
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
41 - 50 of 64 Questions
| # | Question | Ans |
|---|---|---|
| 41. |
Detergents are manufactured with straight hydrocarbon chains, is to make them A. soluble B. biodegradable C. cheaper D. foamy Detailed SolutionBiodegradable because the straight hydrocarbons are natural and slightly soluble in water. Options A,C,D do not have strength hydrocarbon chains and they could harm the environment if they are made with the detergentThere is an explanation video available below. |
|
| 42. |
Which of the following results in the fall of acid rain? A. oxide of lead B. particulate matter C. oxides of sulphur D. gaseous hydrocarbon Detailed SolutionOxide of sulphur is formed as a result of acid rain. Options A,B, D are not formed as a result of the pressure of acidThere is an explanation video available below. |
|
| 43. |
The furring of kettles is caused by the presence of what compound in water? A. calcium tetraoxosulphate (IV) B. calcium hydrogentrioxocarbonate (IV) C. calcium hydroxide D. calcium trioxocarbonate (IV) Detailed SolutionCalcium hydrogen carbonate, often present in temporary hard water, is boiled in a kettle to remove the hardness. In the process, a scale forms on the inside of the kettle in a process known as furring of kettles. This scale is composed of calcium carbonate.There is an explanation video available below. |
|
| 44. |
A difference between chemical and physical change is that in a chemical change A. oxygen is consumed B. heat is supplied C. the reversible process occurs D. a new substance is formed |
|
| 45. |
According to the kinetic theory an absence in temperature causes the kinetic energy of particles to A. decrease B. increase C. remain constant D. be zero |
|
| 46. |
PCL5(g)= PCL3(g) + Cl2(g) A. Decelerate the reaction B. Increase yield of Pcl3 C. Increase the yield of Pcl5 D. Accurate the reaction |
|
| 47. |
Which of the following gives a precipitation when treated with NaOH Solution? A. AlCl3 B. NH4Cl C. Na2CO3 D. CH3COONa |
|
| 48. |
Electronic configuration of an element 13 in the subsidiary energy level is A. \( 1s^2 2s^2 2p^6 3s^2 3p^1 \) B. \( 1s^22s^2 2p^4 3p^1 3s^1 \) C. \( 1s^2 2s^2 2p^6 3s^2 3p^3 \) D. \( 1s^1 2s^2 2p^6 3s^2 3p^4 \) |
|
| 49. |
Alloys are best prepared by A. electroplating B. Arc-welding C. reducing and mixture of their metallic D. cooking a molten of the metals |
|
| 50. |
In countries where the temperature fall below 273k, salt always spilled on the road in order to A. increase the boiling point B. increase the density of the ice C. make the ice impure D. reduce the freezing point of ice |
| 41. |
Detergents are manufactured with straight hydrocarbon chains, is to make them A. soluble B. biodegradable C. cheaper D. foamy Detailed SolutionBiodegradable because the straight hydrocarbons are natural and slightly soluble in water. Options A,C,D do not have strength hydrocarbon chains and they could harm the environment if they are made with the detergentThere is an explanation video available below. |
|
| 42. |
Which of the following results in the fall of acid rain? A. oxide of lead B. particulate matter C. oxides of sulphur D. gaseous hydrocarbon Detailed SolutionOxide of sulphur is formed as a result of acid rain. Options A,B, D are not formed as a result of the pressure of acidThere is an explanation video available below. |
|
| 43. |
The furring of kettles is caused by the presence of what compound in water? A. calcium tetraoxosulphate (IV) B. calcium hydrogentrioxocarbonate (IV) C. calcium hydroxide D. calcium trioxocarbonate (IV) Detailed SolutionCalcium hydrogen carbonate, often present in temporary hard water, is boiled in a kettle to remove the hardness. In the process, a scale forms on the inside of the kettle in a process known as furring of kettles. This scale is composed of calcium carbonate.There is an explanation video available below. |
|
| 44. |
A difference between chemical and physical change is that in a chemical change A. oxygen is consumed B. heat is supplied C. the reversible process occurs D. a new substance is formed |
|
| 45. |
According to the kinetic theory an absence in temperature causes the kinetic energy of particles to A. decrease B. increase C. remain constant D. be zero |
| 46. |
PCL5(g)= PCL3(g) + Cl2(g) A. Decelerate the reaction B. Increase yield of Pcl3 C. Increase the yield of Pcl5 D. Accurate the reaction |
|
| 47. |
Which of the following gives a precipitation when treated with NaOH Solution? A. AlCl3 B. NH4Cl C. Na2CO3 D. CH3COONa |
|
| 48. |
Electronic configuration of an element 13 in the subsidiary energy level is A. \( 1s^2 2s^2 2p^6 3s^2 3p^1 \) B. \( 1s^22s^2 2p^4 3p^1 3s^1 \) C. \( 1s^2 2s^2 2p^6 3s^2 3p^3 \) D. \( 1s^1 2s^2 2p^6 3s^2 3p^4 \) |
|
| 49. |
Alloys are best prepared by A. electroplating B. Arc-welding C. reducing and mixture of their metallic D. cooking a molten of the metals |
|
| 50. |
In countries where the temperature fall below 273k, salt always spilled on the road in order to A. increase the boiling point B. increase the density of the ice C. make the ice impure D. reduce the freezing point of ice |