Question 4481:

• NECO 2003

J.J. Thomson’s model of the atom was abandoned because ____________

A. It could not explain the scattering of alpha particles
B. It did not account for the neutron
C. It did not account for the size of the atom
D. It was known as plum-pudding model
E. The model was not similar to any observable phenomena

Question 4482:

• NECO 2003

Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain

A. Pressure is increased
B. Pressure is reduced
C. The rays of the sun add more heat to the water
D. The saturation vapour pressure of water is higher than at sea-level
E. The temperature is lower than at sea-level

Question 4483:

• NECO 2003

The volume of a given mass of gas is 40cm³ at 27° C. What is its volume at 90° C if its pressure remains constant?

A. 32.84cm³
B. 40.02cm³
C. 48.40cm³
D. 57.44cm³
E. 72.84cm³

Question 4484:

• NECO 2003

Which of the following statements is NOT true?

A. A lead-acid accumulator can deliver a large current because of its very large internal resistance.
B. A secondary cell can be recharged.
C. As a lead-acid accumulator is being charged, the density of the acid in it increases.
D. The chemical action in a primary cell is irreversible.
E. The conventional current in a circuit rlows from the positive to the negative terminal of the battery.

Question 4485:

• NECO 2003

A sheet of white paper viewed through blue glass appears blue because ____________

A. Blue is a primary colour
B. The glass absorbs all colours except the blue colour
C. The glass reflects blue colour
D. The paper reflects blue colour only
E. White light is easily absorbed by the glass