Jamb Chemistry 1995 Past Questions and Answers

Question 6:

• JAMB 1995

A gas sample with an initial volume of 3.25 dm³ is heated and allowed to expand to 9.75 dm³ at constant pressure. What is the ratio of the final absolute temperature to the initial absolute temperature?

A. 3:1
B. 5:2
C. 5:4
D. 8:3

Question 7:

• JAMB 1995

Two cylinders A and B each contains 30 cm³ of
oxygen and nitrogen respectively at the same temperature and pressure. If there are 5.0 moles of nitrogen, then the mass of oxygen is?

A. 3.2 g
B. 6.4 g
C. 80.0 g
D. 160.0 g

Question 8:

• JAMB 1995

A liquid begins to boil when?

A. Its vapour pressure is equal to the vapour pressure of its solid at the given temperature
B. Molecules start escaping from its surface
C. Its vapour pressure equals the atmosphere pressure
D. Its volume is sightly increased

Question 9:

• JAMB 1995

A particle that contains 8 proton, 9 neutrons and 7 electrons could be written as?

A. O
B. O⁺
C. O⁺
D. O^-

Question 10:

• JAMB 1995

In the oil drop experiment, Millikan determined the?

A. Charge to mass ratio of the electron
B. Mass of the electron
C. Charge of the electron
D. Mass of the proton