Jamb Physics 1978 Past Questions and Answers

Question 16:

• JAMB 1978

A few grains of table salt were put in a cup of water, kept at constant temperature and left undisturbed. Eventually all the water tasted salty. The action is due to

A. Convection
B. Osmosis
C. Capillarity
D. Diffusion
E. Conductivity

Question 17:

• JAMB 1978

A temperature 20°C is the same as

A. 36^oF
B. 68^oF
C. 11.1^oF
D. 43.1^oF
E. 25^oF

Question 18:

• JAMB 1978

The latent heat of fusion of ice is 80cal g^-1. How much heat is required to change 10g of ice at Q^oC into water at the same temperature?

A. 80 cal
B. 10 cal
C. 8 cal
D. 800 cal
E. 400 cal

Question 19:

• JAMB 1978

A gas at pressure PNm\(^{-2}\) and temperature 27°C is heated to 77°C at constant volume. The new pressure is

A. 0.85 PN-m^-2
B. 0.86 PN-m^-2
C. 1.16 PN-m^-2
D. 1.18 PN-m^-2
E. 2.85 PN-m^-2

Question 20:

• JAMB 1978

The following are some units i. Ns ii. Mm iii. Nm^-2 iv. J^oK^-1. What are the units of latent heat?

A. I
B. Ii
C. Iii
D. Iv