Jamb Chemistry 2001 Past Questions and Answers

Question 1:

• JAMB 2001

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

Question 2:

• JAMB 2001

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

Question 3:

• JAMB 2001

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

Question 4:

• JAMB 2001

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

Question 5:

• JAMB 2001

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