2025 NECO Commerce Past Questions

A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statements is correct?

1. A.The length of the entrapped air in the horizontal position is less than that in the vertical position
2. B.The length of the entrapped air in the vertical position is less than that in the horizontal position✓ Correct
3. C.The length of the mercury column becomes shorter in the horizontal position than in the vertical position
4. D.The length of the mercury column becomes shorter in the vertical position than in the horizontal position
5. E.The pressure of the entrapped air is atmospheric in both cases.

A common characteristic of ALL living things is

1. A.gametogenesis✓ Correct
2. B.hibernation
3. C.photosynthesis
4. D.phototropism
5. E.respiration

In savanna trees, thick corky bark is an adaption for

1. A.absorbing water✓ Correct
2. B.conserving water
3. C.enhancing transpiration
4. D.reducing transpiration
5. E.resistance to bush fire

Choose from the options labelled A to E, the one that has the same consonant sound as the one represent the underlined letter(s) fact

1. A.acid✓ Correct
2. B.church
3. C.face
4. D.knee
5. E.sick

Choose from the options lettered A to E the one that rhymes with the word given. reverse

1. A.rehearse
2. B.reverts
3. C.revise✓ Correct
4. D.review
5. E.reserve

Relative humidity can be measured with a/an

1. A.Anemometer
2. B.Barometer
3. C.Hydrometer✓ Correct
4. D.Hygrometer
5. E.Photometer

Which of the following fruits is an example of a caryopsis?

1. A.Cashew nut
2. B.Cornbretum✓ Correct
3. C.Maize
4. D.Orange
5. E.Tridax

The magnetic effect of a current-carrying coil is NOT utilized in the making of a/an

1. A.carbon microphone
2. B.electric bells
3. C.magnetic relay
4. D.telephone earpiece✓ Correct
5. E.thermostat

The demand curve of a perfect competitive market is infinitely elastic indicating that the firm can

1. A.A. refuse to sell any quantity
2. B.B. sell any quantity of output at the prevailing price
3. C.C. sell fixed quantity of output at the prevailing market price
4. D.D. sell less quantity✓ Correct
5. E.E. sell more quantity at a higher price

Which of these arrangement of elements is in order of increasing ionization energy?

1. A.Boron, Carbon, Flourine, Nitrogen
2. B.Boron, Carbon, Nitrogen, Flourine✓ Correct
3. C.Carbon, Boron, Nitrogen, Flourine
4. D.Flourine, Nitro9en, Carbon, Boron
5. E.Nitrogen, Flourine, Carbon, Boron