Past Questions And Answers
Which of the following is used to measure the rate of water uptake in plants?
- A. Potometer
- B. Hydrometer
- C. Hygrometer
- D. aspirator
Which of the following does not contribute to evolution?
- A. A constant environment
- B. Mutation
- C. Migration
- D. Genetic drift
Three forces \(F_{1} = (8 N, 300°), F_{2} = (6 N, 090°)\) and \(F_{3} = (4 N, 180°)\) act on a particle. Find the vertical component of the resultant force.
- A. 2 N
- B. 10 N
- C. \((4 + 4\sqrt{3})N\)
- D. \((6 - 4\sqrt{3})N\)
Which of the following is a service industry?
- A. Banking industry
- B. Food processing plant
- C. Cement factory
- D. Pharmaceutical industry
(a)(i) Explain what is meant by saturated solution
(ii) Describe in outline, a suitable procedure for preparing a saturated solution of sodium trioxonitrate(V) at 30°C.
(ii) State two techniques that can be used to recover crystals of sodium trioxonitrate(V) from its saturated solution.
(b) 1.0dm\(^3\) of an aqueous solution at 90°C contains 404g of potassium trioxonitrate(V) and 245g of potassium trioxochlorate (V).
(i) Determine which of the two salts will separate out when the solution is cooled to 60°C. N = 14. O = 16, CI = 35.5, K = 39; Solubility of KNO\(_3\) in water at 60\(^o\)C = 5.14 mol.dm\(^{-3}\), Solubility of KCIO\(_3\) in water at 60°C = 1.61 mol.dm\(^{-3}\)
(ii) Calculate the mass of salt that will separate out at 60°C
(c)(i) List two salts which cause hardness of water.
(ii) Explain why temporary hardness of water result in the furring of kettle.
(a)(i) What is Universal Serial Bus (USB)?
(ii) State two benefits of using USB connection between a computer and another device.
(b) In Table 1, three storage devices are described, Use it to answer questions 3(b)(i) and 3(b)(ii).
(i) In column 2, name the storage device being described in column 1.
(ii) Show the category of storage device being described in column 1 by ticking in any of the column 3, 4 or 5
| SN | 1 | 2 | 3 | 4 | 5 |
| Description of Storage Device | Name of Storage Device | Category of Storage Device | |||
| Primary | Secondary | Offline | |||
| 1 | Magnetic storage medium which is composed of a thin flexible disk sealed in a square plastic carrier. | ||||
| 2 | Optical media - which uses one spiral track.Red lasers are used to read and write data on the media surface and it makes use of dual-layering technology to increase the storage capacity to over 1 GB. | ||||
| 3 | Non-volatile memory chip which contents cannot be altered. It is often used to store the start-up routines in a computer (e.g the BIOS). | ||||
What was Omar JAMB score?
- A. 300
- B. 250
- C. 200
- D. 230
Place' as an element of the marketing mix can also be referred to as
- A. distribution
- B. product pricing
- C. advertising
- D. product design
what is the full meaning of NNDP ?
- National Niger Democratic Parties
- National Nigeria Democratic Party
- Nigeria National Democratic Party
- Nigeria National Democratic Parties
As a result of King Ahab's sin, the people of Israel suffered_____________
- A. pestilence
- B. drought
- C. plague
- D. earthquake.