NECO Chemistry Past Questions & CBT Practice

Use the data to answer this question A class of 40 set out to determine the population of lizards in a bound field measuring 200 metres by 100 metres using the capture-recapture method. In their first outing, the students captured a total of 360 lizards all of which were marked with indelible ink and then released back into the field. After a one week interval the students went back into the field and caught a total of 250 lizards out of which 150 bore the indelible ink mark. What is the estimated population of lizards in the field?

1. A.100✓ Correct
2. B.300
3. C.400
4. D.560
5. E.600

In which region of the body is the diagram illustrated found?

1. A.Abdominal
2. B.Chest✓ Correct
3. C.Neck
4. D.Tail
5. E.Waist

A note, A from a guitar produces a wave of amplitude 4 mm and frequency 1000 Hz. Another note, B from a whistle produces a similar waveform of amplitude 2 mm and frequency 2200 Hz. If the two notes are compared,

1. A.A has a higher pitch than B
2. B.A is louder than B.✓ Correct
3. C.B has a greater speed than A
4. D.B is louder than A
5. E.A and B have the same quality

A common characteristic of ALL living things is

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

Choose from the options lettered A-E the one that meet appropriately completes each sentence We all expected him to pull .......... his illness soon

1. A.away
2. B.in✓ Correct
3. C.off
4. D.over
5. E.through

In the reaction 2H2S(g) + SO2(g) → 2H2SO(I)+3S(s)SO2is acting as _agent

1. A.a bleaching
2. B.a dehydrating
3. C.an oxidizing
4. D.a precipitating✓ Correct
5. E.a reducing

How much heat is required to convert 5.0g of ice at 0 ° C to water at the boiling point? (Specific latent heat of ice = 336Jg-1 specific heat capacity of water = 4.2Jg-1K-1)

1. A.420 J
2. B.1680 J
3. C.1701 J✓ Correct
4. D.2100 J
5. E.3780 J

Price elasticity of supply measures the responsiveness of quantity supplied to

1. A.A. a change in the demand for the product V✓ Correct
2. B.B. a change in the price of the commodity
3. C.C. changes in consumers
4. D.D. changes in prices of other commodities
5. E.E. changes in suppliers income

One of the interior angles of a regular polygon is 120°. Find the number of sides of the polygon

1. A.3
2. B.4✓ Correct
3. C.6
4. D.9
5. E.12

Evaluate 1.25 × 10$^2$ × 0.125 × 10$^3$ × 12.5 × 10$^{-4}$ leaving your answer in standard form

1. A.1.995 × 103
2. B.1.95 × 102
3. C.1.95 × 101
4. D.1.95 × 10-2✓ Correct
5. E.1.95 × 10-3