Chemistry, 2001, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2001

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

11 - 20 of 50 Questions

#	Question	Ans
11.	Deliquescent substance are used for A. Cooling B. Wetting C. Melting D. Drying	D
12.	Pure solvents are obtained by A. Distillation B. Condensation C. Extraction D. Evaporation	A
13.	What is the decrease in volume of air when pyrogallol is shaken with 30.00cm³ of air ? A. 15.00cm³ B. 6.30cm³ C. 0.63cm³ D. 0.06cm³ Show Content Detailed Solution % volume of O₂ in air = 21% ∴ (21/100) * 30 = 6.3	B
14.	Environmental pollution is worsened by the release from automobile exhausts of A. Water vapour B. Steam C. Smoke D. Heavy metals	C
15.	The chemical used for coagulation in water purification is A. Aluminium tetraoxosulphate (VI) B. Copper tetraoxosulphate (VI) C. Sodium tetraoxosulphate (VI) D. Calcium tetraoxosulphate (VI)	A
16.	Phosphorus is stored under water to prevent it from A. Dehydrating B. Becoming inert C. Smelling D. Catching fire	D
17.	In which of the following reactions does reduction takes place A. Fe²⁺ - e^- → Fe³⁺ B. 2O^2- →O₂ + 4e^- C. Cr – 2e^- → Cr²⁺ D. 2H⁺ + 2e^- → H₂	D
18.	P_(g) + Q_(g) ↔ 3R_(s) + S_(g) ΔH is negative Which of the following will increase the yield of R? A. Using a larger close vessel B. Increasing the temperature C. Removing some S D. Adding a positive catalyst	C
19.	A metal M displaces zinc from zinc chloride solution. This shows that A. M is more electronegative than zinc B. Zinc is above hydrogen in the series C. M is more electropositive than zinc D. Electrons flow from zinc to M	C
20.	Which of the following best explains the increase in the rate of a chemical reaction as the temperature rises? A. The bonds in the reacting molecules are more readily broken B. The molecular collisions become more violent C. A lower proportion of the molecules has the necessary minimum energy to react D. The collision frequency of the molecules increase	D

11.	Deliquescent substance are used for A. Cooling B. Wetting C. Melting D. Drying	D
12.	Pure solvents are obtained by A. Distillation B. Condensation C. Extraction D. Evaporation	A
13.	What is the decrease in volume of air when pyrogallol is shaken with 30.00cm³ of air ? A. 15.00cm³ B. 6.30cm³ C. 0.63cm³ D. 0.06cm³ Show Content Detailed Solution % volume of O₂ in air = 21% ∴ (21/100) * 30 = 6.3	B
14.	Environmental pollution is worsened by the release from automobile exhausts of A. Water vapour B. Steam C. Smoke D. Heavy metals	C
15.	The chemical used for coagulation in water purification is A. Aluminium tetraoxosulphate (VI) B. Copper tetraoxosulphate (VI) C. Sodium tetraoxosulphate (VI) D. Calcium tetraoxosulphate (VI)	A

16.	Phosphorus is stored under water to prevent it from A. Dehydrating B. Becoming inert C. Smelling D. Catching fire	D
17.	In which of the following reactions does reduction takes place A. Fe²⁺ - e^- → Fe³⁺ B. 2O^2- →O₂ + 4e^- C. Cr – 2e^- → Cr²⁺ D. 2H⁺ + 2e^- → H₂	D
18.	P_(g) + Q_(g) ↔ 3R_(s) + S_(g) ΔH is negative Which of the following will increase the yield of R? A. Using a larger close vessel B. Increasing the temperature C. Removing some S D. Adding a positive catalyst	C
19.	A metal M displaces zinc from zinc chloride solution. This shows that A. M is more electronegative than zinc B. Zinc is above hydrogen in the series C. M is more electropositive than zinc D. Electrons flow from zinc to M	C
20.	Which of the following best explains the increase in the rate of a chemical reaction as the temperature rises? A. The bonds in the reacting molecules are more readily broken B. The molecular collisions become more violent C. A lower proportion of the molecules has the necessary minimum energy to react D. The collision frequency of the molecules increase	D