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Question 1 of 50
1. Question
A mixture of proteins can best be separated by
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Question 2 of 50
2. Question
The purity of a solid substance can be determined by its
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Question 3 of 50
3. Question
What mass of a divalent metal, Y would react with excess hydrochloric acid to liberate 224 cm3 of hydrogen gas at s.t.p.?
[Y = 40, Molar volume of a gas at s.t.p.3= 22.4 dm]
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Question 4 of 50
4. Question
Which of the following will occur when some crystals of iodine arc slowly heated in a test tube?
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Question 5 of 50
5. Question
A mixture of two gases P and Q occupying volumes 300 cm’
and 100 cm respectively exerts a total pressure of800 mm
Hg. What is the partial pressure of Q?
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Question 6 of 50
6. Question
A panicle that contains 9 protons, 10 neutrons and 9 electrons is
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Question 7 of 50
7. Question
The Clements in the periodic table are listed in order of increasing
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Question 8 of 50
8. Question
The ionic radii of metals are usually
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Question 9 of 50
9. Question
In electrovalence, the oxidation number of the participating metal is always
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Question 10 of 50
10. Question
In which of the following molecules is hydrogen bond prominent?
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Question 11 of 50
11. Question
The end products of burning a candle in the atmosphere are water and
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Question 12 of 50
12. Question
The presence of ammonia gas in a desiccator can exclusively be removed by
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Question 13 of 50
13. Question
The solubility of the solids that dissolves in a given solvent with the liberation of heat will
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Question 14 of 50
14. Question
In the upper atmosphere, the ultra-violet light breaks off a free chlorine atom from chlorofluorocarbon molecule. The effect of this is that the free chlorine atom will
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Question 15 of 50
15. Question
Which of the following produces relatively few ions in solution?
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Question 16 of 50
16. Question
The conductivity of an a solution depends on the
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Question 17 of 50
17. Question
When one mole of hydrochloric acid reacts with one mole of sodium hydroxide, it results in a neutral solution because the reaction involves a
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Question 18 of 50
18. Question
To what volume must 300 cm3 of 0.60 M sodium hydroxide solution be diluted to give a 0.40 M solution?
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Question 19 of 50
19. Question
Calculate the pH of 0.05 mol dm3 H2SO4
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Question 20 of 50
20. Question
HS(g) + CI(g) —> 2HCI(g) + S(s)
In the equation above, the substance that is reduced is
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Question 21 of 50
21. Question
What is the oxidation number of sulphur in FeS4O?
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Question 22 of 50
22. Question
Which of the following is discharged at the cathode during the electrolysis of brine using platinum electrode?
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Question 23 of 50
23. Question
What mass of Cu would be produced by the cathodic reduction of Cu2+ when 1.60 A of current passes through a solution of CuSO4 for 1 hour?
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Question 24 of 50
24. Question
An example of an endothermic reaction is the dissolution of.
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Question 25 of 50
25. Question
The situation obtained when a perfect gas expands into a vacuum is
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Question 26 of 50
26. Question
The collision theory explains reaction rates in terms of
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Question 27 of 50
27. Question
2KCIO3(s) -2KCl(s) + 302(g)
The importance of the catalyst in the reaction above is that
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Question 28 of 50
28. Question
3H(2g) + N(2g) = 2NH3(g); ∆H = – ve
In the reaction above, lowering of temperature will
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Question 29 of 50
29. Question
Which of the following is used in the manufacture of petrol additive?
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Question 30 of 50
30. Question
Diamond is a bad conductor of electricity because its bonding electrons are used in
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Question 31 of 50
31. Question
In the laboratory preparation of oxygen, the gas cannot be collected by displacement of air because
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Question 32 of 50
32. Question
In a chemical test, the formation of a brown ring indicates the presence of
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Question 33 of 50
33. Question
The ability to form complex and colouredions are characteristics of transition metals resulting from the number of electrons in their effected by the addition of
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Question 34 of 50
34. Question
Solvay process is used in the preparation of
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Question 35 of 50
35. Question
Which of these alloys contains copper?
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Question 36 of 50
36. Question
Aluminium docs not react with either dilute or concentrated trioxonitrate (V) acid because
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Question 37 of 50
37. Question
The choice of method for extracting a metal from its ores depends on the
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Question 38 of 50
38. Question
Which of the following is used to power steam engines?
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Question 39 of 50
39. Question
The choice of sodalime in preference to caustic soda in the laboratory preparation of methane can be attributed to it being
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Question 40 of 50
40. Question
The fuel used in miners’ lam s is made up of
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Question 41 of 50
41. Question
The reaction above demonstrates the
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Question 42 of 50
42. Question
Benzene is a polymer of
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Question 43 of 50
43. Question
The IUPAC nomenclature of the compound above is
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Question 44 of 50
44. Question
In the removal of water hardness, permutit is regenerated with a strong solution of
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Question 45 of 50
45. Question
If a solution of KNO3 containing 17.0GDM-3 is cooled from 800C to 800 C, estimate the amount of KN3O revered from the solution.
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Question 46 of 50
46. Question
Hard soaps used for laundry’ are mainly composed of
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Question 47 of 50
47. Question
The conversion of unsaturated to saturated hydrocarbon is effected by the addition of
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Question 48 of 50
48. Question
The functional groups found in amino acid are
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Question 49 of 50
49. Question
Structural Isomers of C5H10 are expected to have
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Question 50 of 50
50. Question
Analysis of a hydrocarbon compound indicates that it has 86% carbon. If its vapir density is 35 calculate its molecular formula
[c = 12 , H = 1]
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