Jamb Physics 1985 Past Questions and Answers

Question 21:

• JAMB 1985

Water shows anomalous behaviour.

A. Below 0^oC
B. Between 0^{oC and 4[sup]o}C[/sup]
C. At exactly 4^oC
D. Between 4^{oC and 100[sup]oC}[/sup]
E. Above 100^oC

Question 22:

• JAMB 1985

Two thermo flasks of volume Vx and Vy are filled with liquid water at an initial temperature of 0^oC. After sometime the temperature were found to be 9x, 9y, respectively. Given that \(\frac{Vx}{Vy}\) = 2 and \(\frac{\theta x}{\theta y}\) = \(\frac{1}{2}\) the ratio of the heat flow into the flask is

A. \(\frac{1}{4}\)
B. \(\frac{1}{2}\)
C. 4
D. 1
E. 2

Question 23:

• JAMB 1985

A good calorimeter should be of

A. Low specific heat capacity and low heat conductivity
B. Low specific heat capacity and high heat conductivity
C. High specific heat capacity and low heat conductivity
D. High specific heat capacity and low heat conductivity
E. Dull surface and low heat conductivity

Question 24:

• JAMB 1985

Which of the following statements are NOT correct?

A. Boiling occurs when the saturated vapour pressure of the liquid involved equals the external pressure
B. Both the boiling point and the saturated vapour pressure of a given liquid depends on the external pressure
C. The saturated vapour presssure rises with increase in temperature
D. The saturated vapour pressure is independent of the volume available for the vapour
E. It is possible to boil water at a lower temperature than 100^oC at high altitude

Question 25:

• JAMB 1985

Which of the following phenomena CANNOT be explained by the molecular theory of matter?

A. Expansion
B. Conduction
C. Convection
D. Radiation
E. Evaporation