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Question 1 of 60
1. Question
The separation techniques represented below is
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Question 2 of 60
2. Question
Which separation technique is suitable for separating suspension of chalk dust in water?
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Question 3 of 60
3. Question
When an atom gains an electron, it becomes
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Question 4 of 60
4. Question
The particle that determines the chemical behaviour of an atom is
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Question 5 of 60
5. Question
The phenomenon whereby atoms of an element exhibit the same atomic number but different mass number is called?
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Question 6 of 60
6. Question
How many sub-energy level has a ‘d’ orbital?
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Question 7 of 60
7. Question
One molecule of oxygen is
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Question 8 of 60
8. Question
What type of bond exists in sodium chloride?
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Question 9 of 60
9. Question
If 12 and 17 are the atomic numbers of elements A and B respectively, the inter atomic bond between these elements is
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Question 10 of 60
10. Question
What is the most portable group of a soft, silvery white solid element that reacts violently with water?
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Question 11 of 60
11. Question
The alkali metals exhibit similar chemical properties because they
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Question 12 of 60
12. Question
Group II elements are commonly called
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Question 13 of 60
13. Question
The atomic radius changes periodically with increasing
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Question 14 of 60
14. Question
800cm3 of a gas diffused through a porous pot in 4 minutes. Calculate the rate at which it diffuses in cm
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Question 15 of 60
15. Question
If r1 and r2 are the rates of diffusion of two gases with densities d1 and d2 Grahams law can be expressed as
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Question 16 of 60
16. Question
Which of the curves above shows the relationship between volume (V) and pressure (P) of an ideal gas at constant temperature?
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Question 17 of 60
17. Question
From ideal gas equation, PV=Nrt, the unit of n is
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Question 18 of 60
18. Question
Which of the following acids is NOT monobasic?
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Question 19 of 60
19. Question
The number of replaceable hydrogen ion (H+), in one molecule of an acid is called its
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Question 20 of 60
20. Question
A soluble base is a/an
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Question 21 of 60
21. Question
Which of the substances below has pH greater than 7 in aqueous solution?
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Question 22 of 60
22. Question
The colour of acid in methyl orange is? Blue
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Question 23 of 60
23. Question
What is the pH of a 50 x 10-4 moldm-3 Â solution of potassium hydroxide ?
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Question 24 of 60
24. Question
What volume in dm3 of oxygen at s.t.p. would react with carbon to form 4.40g of CO2 according to the following equation?
mole of a gas occupies 22.4dm3 at s.t.p.]
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Question 25 of 60
25. Question
O=16] from the equation above, what mass in grams of oxygen is required for to complete combustion of 11 grammes of propane?
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Question 26 of 60
26. Question
Which of the following does NOT define oxidation?
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Question 27 of 60
27. Question
The equation above represents:
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Question 28 of 60
28. Question
The following are type of reaction EXCEPT
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Question 29 of 60
29. Question
Zn(s) + CuSO4(aq) + Cu(s). The reaction above is
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Question 30 of 60
30. Question
The arrangement of two different metals in aqueous solutions of their salts to produce an electric current is known as
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Question 31 of 60
31. Question
What is the amount (in moles) of electrons needed to deposit 6.4g of copper during the electrolysis of copper (II) tetraoxosulphate (VI) solution? [Cu=64]
3.0
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Question 32 of 60
32. Question
Half cell electrode of copper system is represented conventionally as
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Question 33 of 60
33. Question
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Question 34 of 60
34. Question
The equilibrium constant Kc is given by
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Question 35 of 60
35. Question
The minimum amount of energy required before a chemical reaction could occur is called
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Question 36 of 60
36. Question
When is negative in a given reaction, the reaction is
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Question 37 of 60
37. Question
Which of these is a polysaccharide?                Cellulose
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Question 38 of 60
38. Question
Geometric (cis-trans) isomerism is exhibited by
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Question 39 of 60
39. Question
The IUPAC name of the compound above is
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Question 40 of 60
40. Question
When alkynes are hydrogenated completely, they produce compound with the general molecular formula
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Question 41 of 60
41. Question
What is the major product formed when C2H5OH react with CH3COOH?
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Question 42 of 60
42. Question
The reaction above is called
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Question 43 of 60
43. Question
The reaction between ethane and chlorine to form 1,2-dichloroethane is
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Question 44 of 60
44. Question
The structure below is a/an
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Question 45 of 60
45. Question
The most abundant element on earth is
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Question 46 of 60
46. Question
Nitrogen passed on a large scale by
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Question 47 of 60
47. Question
Which of the following is an amphoteric oxide?
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Question 48 of 60
48. Question
In which of the following compound is the oxidation number of nitrogen equal to +3?
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Question 49 of 60
49. Question
Pottasium Hydrogen trioxocarbonate (IV) cannot be produced by solvay process because it is
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Question 50 of 60
50. Question
When chlorine is passed into water and the solution exposed to sunlight, the gas given off is
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Question 51 of 60
51. Question
Which of the following oxides of nitrogen supports the combustion of phosphorus?
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Question 52 of 60
52. Question
Which of the following is NOT a halogen?
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Question 53 of 60
53. Question
Sodium and Pottasium are members of a family elements called
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Question 54 of 60
54. Question
Pure sample of copper (II) oxide could be obtained from a mixture of zinc oxide and copper (II) oxide by
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Question 55 of 60
55. Question
A metal whose oxide is used for the production of coloured glass isAluminium
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Question 56 of 60
56. Question
The following substances are heavy chemicals EXCEPT
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Question 57 of 60
57. Question
Water glass is a
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Question 58 of 60
58. Question
From the equation below, Z represents
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Question 59 of 60
59. Question
In a thermal emission, a negatively charged particle is called
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Question 60 of 60
60. Question
The farthest planet from the sun is
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