Year :
1982
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
1 - 10 of 49 Questions
| # | Question | Ans |
|---|---|---|
| 1. |
An acid is said to be weak if? A. its ions are so completely dissociated that they easily drift apart B. the acid is not corrosive C. the acid has low specific gravity D. its ions move very slowly when in solution E. its ions are incompletely dissociated |
E |
| 2. |
Which of the following statements is correct during the electrolysis of a caustic soda solution using platinum electrodes? A. Oxygen gas is given off at the cathode B. Hydrogen gas is given of at the anode C. Sodium metals is deposited at the anode D. Sodium metal is deposited at the cathode E. AAlkalinity at the cathode increases |
E |
| 3. |
An amphoteric oxide is an? A. amorphous oxide of a metal B. amorphous oxide of a non-mental C. oxide that is insoluble in water D. oxide that behaves both as a base as well as an acid E. oxide that loses its oxygen on sublimation |
D |
| 4. |
Water is poured over a white solid and a colourless neutral gas is evolved which burns with a sooty flame. The white solid is? A. calcium B. calcium oxide C. calcium carbide D. sodium peroxide E. sodium sulphate |
C |
| 5. |
Cotton is almost pure? A. starch B. protein C. animal fibre D. celluose E. mineral fibre |
D |
| 6. |
Which of the following types of reactions takes place between C2H4 and the halogens? A. Substitution B. Polymerization C. Addition D. Saponification E. Oxidation |
C |
| 7. |
The product formed at the the cathode during the electrolysis of sodium chloride solution with carbon electrodes is? A. sodium B. chlorine C. hydrogen D. sodium hydroxide E. oxygen |
C |
| 8. |
Sodium carbonate crystals on exposure to a dry atmosphere change to a white powder. This phenomenon is known as? A. deliquescence B. hygroscopy C. oxidation D. efforescence E. sublimation |
D |
| 9. |
Which of the following statements is incorrect? A. Calcium reacts with water to form calcium B. Magnesium reacts very slowly with water but faster with warm water C. Iron will not react with water in the absence of air D. Sodium reacts with water E. Copper reacts with steam |
E |
| 10. |
In the reaction NH3 + H+ → NH4+, the bond formed results from? A. an electron transferred from NH3 + H+ B. an electron pair donated by NH3 C. an electron pair equally shared D. an electron pair donated by H+ E. an electron tarnsferred from H+ to NH3 Detailed SolutionThe nitrogen atom has a lone pair of electrons that coordinates to the hydrogen cation, which has zero electrons, forming a covalent bond. |
| 1. |
An acid is said to be weak if? A. its ions are so completely dissociated that they easily drift apart B. the acid is not corrosive C. the acid has low specific gravity D. its ions move very slowly when in solution E. its ions are incompletely dissociated |
E |
| 2. |
Which of the following statements is correct during the electrolysis of a caustic soda solution using platinum electrodes? A. Oxygen gas is given off at the cathode B. Hydrogen gas is given of at the anode C. Sodium metals is deposited at the anode D. Sodium metal is deposited at the cathode E. AAlkalinity at the cathode increases |
E |
| 3. |
An amphoteric oxide is an? A. amorphous oxide of a metal B. amorphous oxide of a non-mental C. oxide that is insoluble in water D. oxide that behaves both as a base as well as an acid E. oxide that loses its oxygen on sublimation |
D |
| 4. |
Water is poured over a white solid and a colourless neutral gas is evolved which burns with a sooty flame. The white solid is? A. calcium B. calcium oxide C. calcium carbide D. sodium peroxide E. sodium sulphate |
C |
| 5. |
Cotton is almost pure? A. starch B. protein C. animal fibre D. celluose E. mineral fibre |
D |
| 6. |
Which of the following types of reactions takes place between C2H4 and the halogens? A. Substitution B. Polymerization C. Addition D. Saponification E. Oxidation |
C |
| 7. |
The product formed at the the cathode during the electrolysis of sodium chloride solution with carbon electrodes is? A. sodium B. chlorine C. hydrogen D. sodium hydroxide E. oxygen |
C |
| 8. |
Sodium carbonate crystals on exposure to a dry atmosphere change to a white powder. This phenomenon is known as? A. deliquescence B. hygroscopy C. oxidation D. efforescence E. sublimation |
D |
| 9. |
Which of the following statements is incorrect? A. Calcium reacts with water to form calcium B. Magnesium reacts very slowly with water but faster with warm water C. Iron will not react with water in the absence of air D. Sodium reacts with water E. Copper reacts with steam |
E |
| 10. |
In the reaction NH3 + H+ → NH4+, the bond formed results from? A. an electron transferred from NH3 + H+ B. an electron pair donated by NH3 C. an electron pair equally shared D. an electron pair donated by H+ E. an electron tarnsferred from H+ to NH3 Detailed SolutionThe nitrogen atom has a lone pair of electrons that coordinates to the hydrogen cation, which has zero electrons, forming a covalent bond. |