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

Paper Info

Year :

2001

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

1 - 10 of 50 Questions

#	Question	Ans
1.	25cm³ of a gas X contains Z molecules at 15^oC and 75 mmHg. How many molecules will 25 cm³ of another gas Y contain at the same temperature and pressure? A. 2 Y B. 2 Z C. Z D. Y	C
2.	What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen? [H = 1, O = 16] A. 36.0g B. 8.0g C. 72.0g D. 16.0g Show Content Detailed Solution 2H₂ + O₂ → 2H₂O 4 → 36 8 → X X → (8/6) * 36 = 72.0g	C
3.	A particle that contains 9 protons, 10 neutrons and 10 electrons is a A. negative ion B. positive ion C. neutral atom of non-metal D. neutral atom of a metal	A
4.	Cancerous growths are cured by exposure to A. γ - rays B. β - rays C. α - rays D. infrared rays	A
5.	An oxide XO₂ has a vapour density of 32. What is the atomic mass of X? A. 32 B. 20 C. 14 D. 12 Show Content Detailed Solution XO₂ → 32 * 2 X + 16 * 2 → 64 X = 64 - 32 =32	A
6.	Millikan's contributions to the development of atomic theory is the determination of A. charge on electron B. positive rays C. charge to mass ratio D. cathode rays	A
7.	Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which of these elements is a metal? A. X B. W C. Z D. Y	C
8.	An elements X with relative atomic mass 16.2 contains two isotopes ¹⁶₈X with relative abundance of 90% and ^m₈X with relative abundance of 10%. The value of m is A. 16 B. 18 C. 12 D. 14 Show Content Detailed Solution ¹⁶₈X, ^m₈X 16 * (90/100) + m * (10/100) = 16.2 1440 + 10m = 1620 10m = 180 m = 18	B
9.	Which of the following statements is correct about the average kinetic energy of the molecules of a gas? A. It increase with increase in pressure B. It increase at constant temperature C. It increase with increase in temperature D. It increase with increase in volume	C
10.	The pollution from petroleum spillage in rivers and lakes can best be dispersed by A. Pouring detergents B. Passing of ships through the area C. Pouring organic solvents D. Evaporation	A

1.	25cm³ of a gas X contains Z molecules at 15^oC and 75 mmHg. How many molecules will 25 cm³ of another gas Y contain at the same temperature and pressure? A. 2 Y B. 2 Z C. Z D. Y	C
2.	What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen? [H = 1, O = 16] A. 36.0g B. 8.0g C. 72.0g D. 16.0g Show Content Detailed Solution 2H₂ + O₂ → 2H₂O 4 → 36 8 → X X → (8/6) * 36 = 72.0g	C
3.	A particle that contains 9 protons, 10 neutrons and 10 electrons is a A. negative ion B. positive ion C. neutral atom of non-metal D. neutral atom of a metal	A
4.	Cancerous growths are cured by exposure to A. γ - rays B. β - rays C. α - rays D. infrared rays	A
5.	An oxide XO₂ has a vapour density of 32. What is the atomic mass of X? A. 32 B. 20 C. 14 D. 12 Show Content Detailed Solution XO₂ → 32 * 2 X + 16 * 2 → 64 X = 64 - 32 =32	A

6.	Millikan's contributions to the development of atomic theory is the determination of A. charge on electron B. positive rays C. charge to mass ratio D. cathode rays	A
7.	Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which of these elements is a metal? A. X B. W C. Z D. Y	C
8.	An elements X with relative atomic mass 16.2 contains two isotopes ¹⁶₈X with relative abundance of 90% and ^m₈X with relative abundance of 10%. The value of m is A. 16 B. 18 C. 12 D. 14 Show Content Detailed Solution ¹⁶₈X, ^m₈X 16 * (90/100) + m * (10/100) = 16.2 1440 + 10m = 1620 10m = 180 m = 18	B
9.	Which of the following statements is correct about the average kinetic energy of the molecules of a gas? A. It increase with increase in pressure B. It increase at constant temperature C. It increase with increase in temperature D. It increase with increase in volume	C
10.	The pollution from petroleum spillage in rivers and lakes can best be dispersed by A. Pouring detergents B. Passing of ships through the area C. Pouring organic solvents D. Evaporation	A