Year :
1984
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
21 - 30 of 45 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
In the Haber process for the manufacture of ammonia, finely divided iron is used as A. an ionizing agent B. a reducing agent C. a catalyst D. a dehydrating agent E. an oxidizing agent |
C |
| 22. |
The hybridization of the carbon atom in ethyne is A. sp 4 B. sp 3 C. sp2 D. sp E. s |
D |
| 23. |
An organic compound with a vapour density 56.5 has the following percentage composition:C =53.1% N = 12.4%, O = 28.3%, H = 6.2%. The molecular formula of the compound is A. C3H6O2N B. C5H6O2N C. (C5H7O2N)1/2 D. C5H7O2N E. (C5H7O2N)2 |
D |
| 24. |
When the kerosene fraction from petrol is heated at high temperature, a lower boiling liquid is obtained. This process is known as A. polymerization B. refining C. hydrogenation D. cracking |
D |
| 25. |
Alkaline hydrolysis of naturally occurring fats and oils yields A. fats and acids B. soaps and glycerol C. margarine and butter D. esters E. detergents |
B |
| 26. |
Which of the following statements is INCORRECT? A. Fractional distillation of crude petroleum will give the folloing hydrocarbon fuels in order of increasing boiling point B. Butane < petrol < kerosene of polythene. C. Both but-1-ene and but-1-yne will decolorize bromine readily D. but-2-ene will react with chlorine to form 2,3-dichlorobutane E. calcuim carbide will react with water to form any alkyne |
E |
| 27. |
Which of the following statements is NOT correct about all four of the acids: HBr, HNO3, H 2CO3 and H2SO4? They A. dissolve marble to liberate CO B. have a PH less than 7 C. Turn blue litmus red D. neutralize alkalis to form salt E. react with magnesium to liberate hydrogen |
A |
| 28. |
If the cost of electricity required to deposit 1 g of magnesium is N5.00, how much would it cost to deposit 10g of aluminium? A. N 10.00 B. N27.00 C. N44.44 D. N66.67 E. N33.33 |
D |
| 29. |
Nitrogen can best be obtained from a mixture over oxygen and nitrogen by passing the mixture over A. potassium hydroxide B. heated gold C. heated magnesium D. heated phosphorus E. calcium chloride |
D |
| 30. |
Water is said to be 'hard' if it A. easily forms ice B. has to be warmed before sodium chloride dissolves in it C. froms an insoluble scum with soap D. contains nitrates E. contains sodium ions |
C |
| 21. |
In the Haber process for the manufacture of ammonia, finely divided iron is used as A. an ionizing agent B. a reducing agent C. a catalyst D. a dehydrating agent E. an oxidizing agent |
C |
| 22. |
The hybridization of the carbon atom in ethyne is A. sp 4 B. sp 3 C. sp2 D. sp E. s |
D |
| 23. |
An organic compound with a vapour density 56.5 has the following percentage composition:C =53.1% N = 12.4%, O = 28.3%, H = 6.2%. The molecular formula of the compound is A. C3H6O2N B. C5H6O2N C. (C5H7O2N)1/2 D. C5H7O2N E. (C5H7O2N)2 |
D |
| 24. |
When the kerosene fraction from petrol is heated at high temperature, a lower boiling liquid is obtained. This process is known as A. polymerization B. refining C. hydrogenation D. cracking |
D |
| 25. |
Alkaline hydrolysis of naturally occurring fats and oils yields A. fats and acids B. soaps and glycerol C. margarine and butter D. esters E. detergents |
B |
| 26. |
Which of the following statements is INCORRECT? A. Fractional distillation of crude petroleum will give the folloing hydrocarbon fuels in order of increasing boiling point B. Butane < petrol < kerosene of polythene. C. Both but-1-ene and but-1-yne will decolorize bromine readily D. but-2-ene will react with chlorine to form 2,3-dichlorobutane E. calcuim carbide will react with water to form any alkyne |
E |
| 27. |
Which of the following statements is NOT correct about all four of the acids: HBr, HNO3, H 2CO3 and H2SO4? They A. dissolve marble to liberate CO B. have a PH less than 7 C. Turn blue litmus red D. neutralize alkalis to form salt E. react with magnesium to liberate hydrogen |
A |
| 28. |
If the cost of electricity required to deposit 1 g of magnesium is N5.00, how much would it cost to deposit 10g of aluminium? A. N 10.00 B. N27.00 C. N44.44 D. N66.67 E. N33.33 |
D |
| 29. |
Nitrogen can best be obtained from a mixture over oxygen and nitrogen by passing the mixture over A. potassium hydroxide B. heated gold C. heated magnesium D. heated phosphorus E. calcium chloride |
D |
| 30. |
Water is said to be 'hard' if it A. easily forms ice B. has to be warmed before sodium chloride dissolves in it C. froms an insoluble scum with soap D. contains nitrates E. contains sodium ions |
C |