JAMB: CHEMISTRY
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Title: 2018 Chemistry Exam Past Questions & Answers for JAMB.
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Time Allowed: 30 minutes
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Question 1 of 40
1. Question
The general formula for alkanes is
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Question 2 of 40
2. Question
The elements in the periodic table are listed in order of
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Question 3 of 40
3. Question
The action between organic acid and alcohol in the presence of an acid catalyst is known as
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Question 4 of 40
4. Question
The constituent common to duralumin and alnico is
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Question 5 of 40
5. Question
The solubility of the solids that dissolves in a given solvent with the liberation of heat will
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Question 6 of 40
6. Question
What mass of Cu could be produced by the cathodic reduction of C when 1.60 A of current passes through a solution of CuSO4 for 1 hour? [F = 96500 Cmol-1, Cu = 64].
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Question 7 of 40
7. Question
Calculate the pH of 0.05 mol/dm3 H2SO4
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Question 8 of 40
8. Question
The choice of method for extracting a metal from its ore depends on the
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Question 9 of 40
9. Question
Which of the follow produces relatively few ions in solution?
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Question 10 of 40
10. Question
The knowledge of half – life can be used to
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Question 11 of 40
11. Question
An element X forms the following compounds with chlorine: XCl4, XCl3, XCl2. This illustrates the
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Question 12 of 40
12. Question
A correct electrochemical series can be obtained from K, Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging _______
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Question 13 of 40
13. Question
The end products of burning a candle in the atmosphere are water and
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Question 14 of 40
14. Question
The collision theory explains reaction rates in terms of
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Question 15 of 40
15. Question
The presence of ammonia gas in a desicator can exclusively be removed by
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Question 16 of 40
16. Question
Aluminium does not react with either dilute or concentrated trioxonitrate (v) acid because
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Question 17 of 40
17. Question
Which of these sources of water may contain least concentration of \(\scriptsize Ca^{2+} \; and \; Mg^{2+}?\)
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Question 18 of 40
18. Question
The conductivity of an acid solution depends on the
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Question 19 of 40
19. Question
Which of the following metals cannot displace or replace hydrogen present in water or stream?
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Question 20 of 40
20. Question
Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively therefore
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Question 21 of 40
21. Question
The derivative of benzene that can be used in making explosives is
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Question 22 of 40
22. Question
The ionic radii of metals are usually
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Question 23 of 40
23. Question
Calculate the percentage composition of oxygen in calcium trioxocarbonate(iv) [Ca = 40, C = 12, O = 16]
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Question 24 of 40
24. Question
Which of these alloys contains copper?
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Question 25 of 40
25. Question
If the molecular mass of tetraoxosulphate (vi) acid is 98, calculate its vapour density.
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Question 26 of 40
26. Question
Sieving is a technique used to separate mixtures containing solid particles of
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Question 27 of 40
27. Question
An element used in the production of matches is
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Question 28 of 40
28. Question
The sulphide which is insoluble with dilute hydrochloric acid is
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Question 29 of 40
29. Question
Which of the following is an example of a chemical change?
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Question 30 of 40
30. Question
To what temperature must a gas be raised from 273k in order to double both its volume and pressure?
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Question 31 of 40
31. Question
According to the kinetic theory, an increase in temperature causes the kinetic energy of particles to
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Question 32 of 40
32. Question
The type of bonding in [Cu(NH3)4]2+ is
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Question 33 of 40
33. Question
What is the pH of 0.001 moldm-3 solution of sodium hydroxide?
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Question 34 of 40
34. Question
The boiling of fat and aqueous caustic soda is referred to as
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Question 35 of 40
35. Question
Which of the following pair of substances will react further with oxygen to form a higher oxide?
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Question 36 of 40
36. Question
The number of electrons in the valence shell of an element of atomic number 14 is?
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Question 37 of 40
37. Question
What volume of oxygen will remain after reacting with 8cm3 of hydrogen gas with 20cm3 oxygen gas?
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Question 38 of 40
38. Question
The IUPAC name for the compound is
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Question 39 of 40
39. Question
What is the concentration of a solution containing 2 g of NaOH in 100 cm3 of solution? [Na = 23, O = 16, H = 1]
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Question 40 of 40
40. Question
How many atoms are in 6.0g of magnesium? [Mg = 24, NA = 6.02 x 1023 mol-1]
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