26. The efficiency of a machine is always less than 100% due to
A. its high mechanical advantage
B. the greater load to effort ratio
C. the work done when operating
D. the work done against friction
D
27. Which of the following pairs of compounds will produce an ester when warmed with few drops of concentrated sulphuric acid?
A. Ethanol and ethane
B. Ethanol and ethanoic acid
C. Ethane and ethanoic acid
D. Ethanoic acid and ethane
B
28. The use of watering can is necessary in crop production
A. after harvesting of the field crops
B. during rainy season
C. when the crops are at the nursery stage
D. when the farm is far from the source of water
C
29. Which of the following joints allow movement in all directions?
A. ball and socket joints
B. hinge joints
C. gliding joints
D. pivot joint
A
30. A car traveling at a uniform speed of 40.0 ms−1 covers the distance between two stations in 3 minutes. Calculate the distance between the stations
A. 0.2 km
B. 2.4 km
C. 4.8 km
D. 8.0 km
C
31. Which of the following processes is associated with rusting of iron? It
A. is a physical change
B. takes place in the presence of dry air
C. releases carbon dioxide
D. produces an oxide of iron
D
32. Aristotle classification of living organisms was based on the
A. appearance and movement of the organisms
B. structural similarities and differences in the organism
C. anatomical and histological differences in the organisms
D. evolutionary trends in the organisms
A
33. Which of the following crops is stored in barns?
A. cassava
B. cowpea
C. pineapple
D. yam
D
34. Which of the following statements about the diagram below is correct?
A. Portion X is called penumbra
B. Portion Y is called umbra
C. Illustrates an eclipse of the sun
D. Illustrates an eclipse of the moon
D
35. A test for hydrogen in the laboratory is
A. a characteristic irritating smell
B. a 'pop' sound produced with a glowing splint
C. production of pungent smell
D. rekindling of glowing splint
B
36. Fats and oils are the esters formed from the reaction between
A. glycerine and long chain fatty acids
B. glycerol and long chain fatty acids
C. glycerine and sodium hydroxide
D. glycerol and sodium hydroxide
B
37. When a cube of sugar is treated with concentrated sulphuric acid, a black product is formed due to
A. dehydration
B. esterification
C. oxidation
D. neutralization
A
38. A piece of metal of volume 25 cm3 has a mass of 45 g. Determine its density in kg m−3
A. 0.56 × 103 kg m−3
B. 1.80 × 103 kg m−3
C. 5.66 × 103 kg m−3
D. 1.80 × 104 kg m−3
B
39. Which of the following methods cannot be used to protect iron against rust?
A. enameling
B. galvanizing
C. painting
D. riveting
D
40. Which of the following statements about inhaled air and exhaled air is correct?
A. Exhaled air contains more oxygen than inhaled air
B. Inhaled air contains same amount of oxygen as exhaled air
C. Inhaled contains more carbon dioxide than exhaled air
D. Exhaled air contains more carbon dioxide than inhaled air
D
41. Sound energy can be converted into an electrical energy by
A. amplifier
B. loudspeaker
C. microphone
D. radio
A
42. An onion bulb can be described as one which
A. grows horizontally underground and has long internodes
B. grows obliquely from and underground parts of the parent plant
C. has fibrous roots arising from the base and a short conical stem that grows vertically
D. has thick horizontal stem and adventitious roots arising from the nodes
C
43. Which of the following effects are associated with late harvesting of maize?
I. increase in crop yield
II. rain may cause grain to rot
III. weevils may attack and destroy grain
IV. exposure of maize to attacks by birds and rodents
A. I and II only
B. III and IV only
C. I, II and III only
D. II, III and IV only
D
44. A quantity of NaCl was dissolved in 100.0 cm3 of solution to obtain 0.54 M NaCl solution. Determine the mass of NaCl used [Na = 23, Cl = 35.5]
A. 2.93 g
B. 5.85 g
C. 29.25 g
D. 58.50 g
A
45. The scrotum which contains the testes is located externally because
A. The sperms will be too far away from the egg if the scrotum is placed internally
B. It will take up too much space in the abdomen
C. The temperature for sperm production should be higher than the body temperature
D. The temperature for sperm production should be lower than the body temperature
D
46. Atmospheric air is a mixture because it
A. supports combustion
B. can be liquefied
C. contains more than two elements
D. has no definite composition
B
47. The structure that covers the opening of the trachea during swallowing and prevents food from entering it is the
A. epiglottis
B. lungs
C. pharynx
D. rib cage
A
48. Blinking of the eye is considered as a reflex action because it is
A. a delayed response
B. initiated from the cerebrum
C. an automatic response
D. under the control of the cerebellum
C
49. Which of the following organisms is an ectoparasite?
A. Housefly
B. Liver fluke
C. Tapeworm
D. Tick
D
50. The true stomach of a ruminant is the
A. Abomasum
B. Omasum
C. Reticulum
D. Rumen
A
