Year :
2000
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
41 - 50 of 50 Questions
| # | Question | Ans |
|---|---|---|
| 41. |
The repeating unit in natural rubber is A. alkyne B. isoprene C. n-propene D. peoprene |
B |
| 42. |
Unsaturated organic compounds are identified by decolourization of A. silver bromine and potassium tetraoxomanganate (VII) solutions B. bromine water and acidified potassium tetraoxomanganate (VII) solution C. silver bromide solution and bromine water D. bromine water and alkaline potassium tetraoxomanganate (VII) solution |
B |
| 43. |
The conditions necessary for the extraction of a water molecule from two molecules of ethanol are A. less acid and lower temperature B. excess acid and a lower temperature C. excess acid and a higher temperature D. less acid and a higher temperature Detailed Solution- The formation of ethoxyethane ( a sweet smelling liquid) can be considered a dehydration reaction- This is because the overall reaction is the loss of one molecule of water from two molecules of ethanol - If the alkanol is in excess instead of the acid in excess, and the temperature is lower. |
|
| 44. |
The chlorinated alkane often used industrially to remove grease is A. tetrachloromethane B. chloromethane C. trichloromethane D. dichlorometane |
A |
| 45. |
The reaction of carbide with water gives A. ethyne B. ethene C. ethane D. ethanal |
A |
| 46. |
Alkanones are generally obtained by the oxidation of A. primary alkanols B. secondary alkanols C. tertiary alkanols D. alkanoic acid |
B |
| 47. |
Sucrose is made up of A. glucose and glucose B. glucose and fructose C. fructose and fructose D. galactose and glucose |
B |
| 48. |
 The diagram above is the solubility curve of a solute, X. Find the amount of X deposited when 500cm3 of a solution of X is cooled from 60oC to 20oC. A. 0.750 mole B. 0.950 mole C. 2.375 moles D. 4.750 moles |
A |
| 49. |
 The graph that describes a zero order reaction is A. A B. B C. C D. D |
B |
| 50. |
 The compound above is an A. ether B. ester C. alkanal D. alkanol |
B |
| 41. |
The repeating unit in natural rubber is A. alkyne B. isoprene C. n-propene D. peoprene |
B |
| 42. |
Unsaturated organic compounds are identified by decolourization of A. silver bromine and potassium tetraoxomanganate (VII) solutions B. bromine water and acidified potassium tetraoxomanganate (VII) solution C. silver bromide solution and bromine water D. bromine water and alkaline potassium tetraoxomanganate (VII) solution |
B |
| 43. |
The conditions necessary for the extraction of a water molecule from two molecules of ethanol are A. less acid and lower temperature B. excess acid and a lower temperature C. excess acid and a higher temperature D. less acid and a higher temperature Detailed Solution- The formation of ethoxyethane ( a sweet smelling liquid) can be considered a dehydration reaction- This is because the overall reaction is the loss of one molecule of water from two molecules of ethanol - If the alkanol is in excess instead of the acid in excess, and the temperature is lower. |
|
| 44. |
The chlorinated alkane often used industrially to remove grease is A. tetrachloromethane B. chloromethane C. trichloromethane D. dichlorometane |
A |
| 45. |
The reaction of carbide with water gives A. ethyne B. ethene C. ethane D. ethanal |
A |
| 46. |
Alkanones are generally obtained by the oxidation of A. primary alkanols B. secondary alkanols C. tertiary alkanols D. alkanoic acid |
B |
| 47. |
Sucrose is made up of A. glucose and glucose B. glucose and fructose C. fructose and fructose D. galactose and glucose |
B |
| 48. |
The diagram above is the solubility curve of a solute, X. Find the amount of X deposited when 500cm3 of a solution of X is cooled from 60oC to 20oC. A. 0.750 mole B. 0.950 mole C. 2.375 moles D. 4.750 moles |
A |
| 49. |
The graph that describes a zero order reaction is A. A B. B C. C D. D |
B |
| 50. |
The compound above is an A. ether B. ester C. alkanal D. alkanol |
B |