2023 NECO Chemistry Past Questions

Choose from the options lettered A - E the one that is most nearly opposite in meaning to the expressions in italics My boss is strict with the children but ........ with the workers.

1. A.callous✓ Correct
2. B.calm
3. C.forceful
4. D.latent
5. E.lenient

Which of the following is NOT a type of finger print?

1. A.arch
2. B.compound✓ Correct
3. C.loop
4. D.simple
5. E.whorl

Which of the following processes converts nitrates in the soil to atmospheric nitrogen?

1. A.Denitrification
2. B.Lightning✓ Correct
3. C.Nitrification
4. D.Putrefaction
5. E.Rainfall

In an acute angle-triangle XYZ, XZ = 9cm, YZ = 11cm and ∠XZY = 35° Calculate ∠YXZ, correct to the nearest degree.

1. A.57°✓ Correct
2. B.45°
3. C.33°
4. D.16°
5. E.89°

Which of the following enzymes act on carbohydrates?

1. A.Amylase
2. B.Lipase
3. C.Pepsin✓ Correct
4. D.Renin
5. E.Trypsin

From the options lettered A - E, choose the one that is the most appropriate interpretation of the expression in italics The coach said that he would infuse new blood into the team in preparation for the next competition. This means that

1. A.members of the team would undergo blood transfusion
2. B.members of the team will be tested to determine their fitness✓ Correct
3. C.new players would be recruited to strengthen the team
4. D.old members of the team" would be served blood tonic to make them perform better
5. E.the coach was not satisfied with the performance of the team

Which of the following factors will NOT account for an outward shift of production possibility curve?

1. A.A. budgeting and planning based on expectations
2. B.B. expansion in employment
3. C.C. discovering and exploration of new resources✓ Correct
4. D.D. introduction of improved production techniques
5. E.E. skill improvement through education and training

A ray of light experiences a minimum deviation when passing through an equilateral triangular glass prism. Calculate the angle of incidence of the ray. [Refractive index of glass = 1.5]

1. A.300.0°✓ Correct
2. B.48.6°
3. C.60.0°
4. D.75.5°
5. E.105.0 °

An astronaut is walking on the moon where the magnitude of the acceleration due to gravity "g’ is one-sixth that on earth. Compared with their magnitudes on the earth, his mass and weight on the moon are

1. A.both less✓ Correct
2. B.less and the same respectively
3. C.the same and less respectively
4. D.the same as on earth
5. E.both greater.

The cell organelle, from which spindle fibers originate during cell division in animal cells is known as

1. A.Centrosome
2. B.Chromosome
3. C.Leucoplast
4. D.Lysosome✓ Correct
5. E.Ribosome