WAEC (WASSCE) Past Questions, CBT Practice & Syllabus

Which of the following statements ls true about transpiration? It is the

1. A.loss of water in the form of vapour from the surface of the’ leaf
2. B.loss of water in the form of vapour from the surface of the root✓ Correct
3. C.absorption of water in the form of vapour from the body of the pint
4. D.movement of water through the body of the plant.

A piece of brass of mass 170kg has its temperature raised from 0ºC to 30ºC. Calculate its increase in volume, given the density of brass at 0 °C as 8.5 x 103kgm$^3$ and its cubic expansivity as 5.7 x 10$^{-5}$k$^{-1}$

1. A.3.4 x 10-4m3
2. B.4.3 x 10-5m3
3. C.3.4 x 10-5m3✓ Correct
4. D.3.4 x 10-3m3
5. E.3.4 x 10-2m3

Which of the following equations shows how how the linear expansivity ($\alpha$) and the cubic expansivity ($\gamma$) of a material are related?

1. A.$\gamma = \alpha$✓ Correct
2. B.$\gamma = 1 - \alpha$
3. C.$\gamma = 2 \alpha$
4. D.$\gamma = 3 \alpha$

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences: But for the timely intervention of the police, the kidnapper........by the angry mob.

1. A.will be lynched
2. B.would have been lynched
3. C.would be lynched✓ Correct
4. D.will have been lynched

An alternating current with a peak value of 5A passes through a resistor of resistance 10Ω. Calculate the rate at which energy is dissipated in the resistor

1. A.250W
2. B.125W
3. C.50W
4. D.35.4W✓ Correct
5. E.12.5W

The diagram below is an illustration of a cross between plants A and B of the same species. Study it and answer the question below;       If the F1 generation are plants with high yield and resistance, the genotype of the F1 generation plants would be

1. A.YYRR
2. B.YyRr
3. C.yyRr
4. D.yyrr✓ Correct

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences: This is not your book, it is .............

1. A.Andrew
2. B.Andrews
3. C.Andrew's✓ Correct
4. D.Andrews'

The most suitable process of obtaining water from an aqueous solution of sugar i

1. A.Crystallization
2. B.Distillation
3. C.Filtration✓ Correct
4. D.Decantation

It could be inferred from the cartoon in figure 1 that the activities of cult groups on campus may not be reduced by

1. A.A. religious instruction
2. B.B. campaign against cultism✓ Correct
3. C.C. relevant legislation
4. D.D. bullet proof vest

A chord of circle of radius 26cm is 10cm from the center of the circle. calculate the length of the chord

1. A.16cm
2. B.27.86cm✓ Correct
3. C.32cm
4. D.48cm
5. E.55.72cm