Year :
1980
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
41 - 47 of 47 Questions
| # | Question | Ans |
|---|---|---|
| 41. |
The following arrangement of elements in order of decreasing number of outer electrons; One of the elements is wrongly placed. Which is it? ALUMINIUM, CHLORINE, SILICON, MAGNESIUM AND SODIUM. A. chlorine B. aluminium C. silicon D. magnesium E. sodium |
B |
| 42. |
Which of the following tests would confirm-unequivocally that a solution X contain the sulphate ion if it gives with A. silver nitrates solution, a white precipates insoluble in dilute HNO3 B. barium chloride solution, a white precipitate insoluble in dilute H2SO4 C. barium chloride solution, a white precipitate insoluble in dilute HCl D. barium chloride solution a white precipitate soluble in dilute ammonia E. barium chloride solution a white precipitate insoluble in dilute HCl |
C |
| 43. |
When copper (ii) sulphate solution is treated with excess ammonium hydroxide, a precipitate is first formed, and then this dissolves to give a deep blue solution. This deep blue solution is a A. Cu(OH)2 B. CuSo4.5H2O C. (NH4)2SO4 D. Cu(NH3)4(OH)2 E. CuSO4.(NH4)2SO4.2H2O |
E |
| 44. |
Which of the following derivatives of nitrogen affords an aqueous solution having a pH of less that 7? A. N2O B. NO C. NO2 D. NaNO3 E. NH3 |
C |
| 45. |
Detergents are more advantageous than soaps in hard water districts because A. on treatment with hard water they either form soluble calcium salts or do not react with calcium ion B. on treatment with hard water they form soluble calcium salts C. on treatment with hard water they form sodium salts D. on treatment with hard water they are converted into soaps E. on treatment with hard water they form more lather than soaps does |
A |
| 46. |
Which of the following classes of organic compounds undergoes rapid oxidation with bromine water? A. alcohols B. alkenes C. carboxylic acids D. esters E. alkanes |
B |
| 47. |
An endothermic reaction is one during which heat is...........................and can be represented by the symbol..........
A. liberated, -\(\Delta\)H B. liberated, +\(\Delta\)H C. absorbed, -\(\Delta\)H D. absorbed, +\(\Delta\)H E. absorbed, +\(\Delta\)G |
D |
| 41. |
The following arrangement of elements in order of decreasing number of outer electrons; One of the elements is wrongly placed. Which is it? ALUMINIUM, CHLORINE, SILICON, MAGNESIUM AND SODIUM. A. chlorine B. aluminium C. silicon D. magnesium E. sodium |
B |
| 42. |
Which of the following tests would confirm-unequivocally that a solution X contain the sulphate ion if it gives with A. silver nitrates solution, a white precipates insoluble in dilute HNO3 B. barium chloride solution, a white precipitate insoluble in dilute H2SO4 C. barium chloride solution, a white precipitate insoluble in dilute HCl D. barium chloride solution a white precipitate soluble in dilute ammonia E. barium chloride solution a white precipitate insoluble in dilute HCl |
C |
| 43. |
When copper (ii) sulphate solution is treated with excess ammonium hydroxide, a precipitate is first formed, and then this dissolves to give a deep blue solution. This deep blue solution is a A. Cu(OH)2 B. CuSo4.5H2O C. (NH4)2SO4 D. Cu(NH3)4(OH)2 E. CuSO4.(NH4)2SO4.2H2O |
E |
| 44. |
Which of the following derivatives of nitrogen affords an aqueous solution having a pH of less that 7? A. N2O B. NO C. NO2 D. NaNO3 E. NH3 |
C |
| 45. |
Detergents are more advantageous than soaps in hard water districts because A. on treatment with hard water they either form soluble calcium salts or do not react with calcium ion B. on treatment with hard water they form soluble calcium salts C. on treatment with hard water they form sodium salts D. on treatment with hard water they are converted into soaps E. on treatment with hard water they form more lather than soaps does |
A |
| 46. |
Which of the following classes of organic compounds undergoes rapid oxidation with bromine water? A. alcohols B. alkenes C. carboxylic acids D. esters E. alkanes |
B |
| 47. |
An endothermic reaction is one during which heat is...........................and can be represented by the symbol..........
A. liberated, -\(\Delta\)H B. liberated, +\(\Delta\)H C. absorbed, -\(\Delta\)H D. absorbed, +\(\Delta\)H E. absorbed, +\(\Delta\)G |
D |