1. Element X with electronic configuration 2,8,2 and element Y with electronic configuration 2,8,7 are likely to combine by
2. Chemical symbol represents_______
4. A compound is gotten by _________
5. These are the adverse effects of chemistry except
6. _______ has helped to increase food production
7. Which of the following apparatus is used to measure accurately a specific volume of liquid?
8. One of the following is not a branch of chemistry
9. _______ is the science that deals with the composition, structure and properties of substances and with the transformations they undergo
10. We study chemistry to acquire knowledge about
11. What is the process called when a gas changes into liquid
12. Which of the following is a physical change
13. Which of the following describes the process of depositing a zinc layer on iron?
14. Which of the following is not essential for rusting to take place?
15. Heavy chemicals can be harmful to humans except if it is in
16. Chemicals used by industries in small quantities but with high purity is
17. Which process is used to separate out different hydrocarbon compounds from petroleum
18. Atom is made up of the following except
19 . ________ method of science deals with asking of intelligent questions
20. Any substance that has mass and volume is known as
21. Which of the following can be compressed
22. What is the mass number of an element with 12 protons and 12 neutrons
23. The SI unit of mass is
24. The atomic number of potassium is
25. The depletion of metal parts due to the reaction between moisture and oxygen is called
26. Litmus is used to test whether the substance is
27. What is the endpoint of a titration?
28. What is the chemical name of common table salt?
30. Which among the following is a double salt?
31. Chlorine readily reacts with?
32. Atom is the building block of ?
33. .......... is the method of separating dust and water
34. . Any substance that cannnot be split into two or more simpler units by chemical means is called
35. The chemical formula of Carbon (ii) oxide is
36. Oxygen is in group.......... in the periodic table
37. The combining power of an element is
38. The charge an element appears to have is called
39. The phenomenon whereby an element have the same atomic number but different mass number is known as
40. Which of the following sources cannot be used for drinking purposes?
41. The formation of clouds is due to
43. Which one is the purest form of water?
44. What is the most common isotope of hydrogen
45. The symbol Ar stands for which element?
46. Which of these elements is a nonmetal?
47. You can't live without water! What is its chemical formula?
48. When two elements combine together chemically, they form a
49. The most reactive metal in the reactivity series is
50. Metals tend to lose electrons and form
51. Reactivity series of metals, the more reactive metals are at the .....
52. Which of the following chemical equations shows the product of water reacting with sodium oxide
53. The mass number of Calcium is
54. . State symbols are used to ........ in a chemical equation
55. . A nuclear fission reaction becoming self-sustaining depends on
56. Helium nuclei particles are called
57. The relative molecular mass of Na2CO3 is {Na=23, C = 12, O = 16}
58. The following are radioactive elements except
60._______ is a liquid metal.
