Iraqi Third Intermediate Ministerial Exams · General Science

Physics, Chemistry and Biology Basics

58 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 58 questions

  1. Which part of a plant cell is mainly responsible for photosynthesis?
  2. Which gas do plants take in from the air as a raw material for photosynthesis?
  3. What is the chemical formula of water?
  4. What is the SI unit of electrical resistance?
  5. A current of 2 A flows through a resistor of 6 ohms. What is the potential difference across the resistor?
  6. What is the chemical symbol for sodium?
  7. A car of mass 1000 kg accelerates at 3 m/s squared. What is the resultant force acting on it?
  8. Which organ pumps blood around the human body?
  9. What is the pH of a neutral solution at room temperature?
  10. What is the speed of an object that travels 300 m in 20 s?
  11. Which type of bond forms when atoms share pairs of electrons?
  12. Which process moves water through a partially permeable membrane from a dilute solution to a more concentrated one?
  13. A ray of light passes from air into glass and bends towards the normal. What is this effect called?
  14. What is the name of the change in which a liquid turns to vapour only at its surface, at any temperature below boiling?
  15. Which gas is the most abundant in the Earth's atmosphere?
  16. Which part of the blood carries oxygen around the body?
  17. Which of these is a chemical change?
  18. A 60 W lamp is on for 5 hours. How much energy does it transfer, in kilowatt hours?
  19. In which part of the cell are proteins made?
  20. Which metal is a liquid at room temperature?
  21. Which expression gives the kinetic energy of an object of mass m moving at speed v?
  22. A 2 kg object is lifted 5 m. Taking g as 10 N/kg, how much gravitational potential energy does it gain?
  23. A 0.5 kg metal block absorbs 4000 J of energy. Its specific heat capacity is 400 J/kg per degree Celsius. By how much does its temperature rise?
  24. Which of these is a renewable source of energy?
  25. What type of reaction occurs when an acid reacts with an alkali to form a salt and water?
  26. Which statement about the nervous system and the hormone system in humans is correct?
  27. Which particle in an atom has a positive charge?
  28. How many chromosomes are in a normal human body cell?
  29. What causes the seasons on Earth?
  30. A student dissolves 10 g of salt in 90 g of water. What is the concentration of the solution as a mass percentage of salt?
  31. Which instrument is used to measure atmospheric pressure?
  32. Which planet is closest to the Sun?
  33. Which food test turns blue-black when iodine solution is added?
  34. In a food chain grass, rabbit, fox, which organism is the primary consumer?
  35. A 12 V supply is connected to a 4 ohm resistor and an 8 ohm resistor in series. What current flows in the circuit?
  36. Hydrogen burns in oxygen to make water: 2H2 + O2 gives 2H2O. What mass of water forms from 4 g of hydrogen? (H = 1, O = 16)
  37. Which gas do plants take in from the air for photosynthesis?
  38. What is the chemical formula of carbon dioxide?
  39. Where does most digestion of food finish and absorption take place?
  40. Which process moves water through a partially permeable membrane from a dilute solution to a more concentrated solution?
  41. Which of these is an acid?
  42. Which indicator turns red in acid solution?
  43. What type of bond forms when atoms share pairs of electrons?
  44. Which particle in the nucleus has no charge?
  45. What is the atomic number of an element?
  46. What is the change from a gas to a liquid called?
  47. What is the SI unit of force?
  48. Which type of energy does a moving car have?
  49. Which kind of mirror is used as a car's rear-view mirror to give a wide field of view?
  50. What happens to light when it passes from air into water?
  51. Which type of wave needs a medium to travel?
  52. Which layer of the Earth do we live on?
  53. Which gas is mainly responsible for the greenhouse effect caused by burning fuels?
  54. What do we call an animal that eats only plants?
  55. What do we call organisms that break down dead material?
  56. What is the process by which a seed starts to grow?
  57. Which method would you use to get salt from salt solution?
  58. What is the name for a substance that speeds up a reaction without being used up?

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