JAMB Chemistry 2013 Past Questions: Practice Test with Answers
Free JAMB Chemistry 2013 past-questions practice test with answers and clear explanations. Topics include stoichiometry, gas laws, organic reactions, electrochemistry and equilibrium.
Este test está estructurado para cubrir todas las áreas clave. Revisa el desglose del contenido a continuación.
49
Preguntas Totales
1200 min
Duración Estimada
Gratuito
Tipo de Acceso
Mostrando solo enunciados. Las opciones y respuestas se muestran en el simulador.
1
The presence of an impurity in a substance will cause the melting point to
2
What volume of carbon(II) oxide is produced by reacting excess carbon with 10 dm3 of oxygen?
3
From the diagram above, an ideal gas is represented by
4
The rate of diffusion of a gas Y is twice that of Z. If the relative molecular mass of Y is 64 and the two gases diffuse under the same conditions, find the relative molecular mass of Z.
5
The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is
6
How many unpaired electrons are in the p-orbitals of a fluorine atom?
7
The radioactive emission with the least ionization power is
8
The shape of the carbon(IV) oxide (CO2) molecule is
9
Which of the following molecules is held together by hydrogen bond?
10
The bond formed between two elements with electron configurations 1s2 2s2 2p6 3s2 and 1s2 2s2 2p4 is
11
The constituent of air that acts as a diluent is
12
Steam changes the colour of anhydrous cobalt(II) chloride from
13
An example of a hygroscopic substance is
14
If 24.4 g of lead(II) trioxonitrate(V) were dissolved in 42 g of distilled water at 20 °C, calculate the solubility of the solute in g dm−3.
15
The solvent used for removing grease stain is
16
In a water body, too much sewage leads to
17
10.0 dm3 of water was added to 2.0 mol dm−3 of a 2.5 dm3 solution of HCl. What is the concentration of the final solution (mol dm−3)?
18
Three drops of a 1.0 mol dm−3 solution of HCl were added to 20 cm3 of a solution of pH 6.4. The pH of the resulting solution will be
19
Which of the following substances is not a salt?
20
An insoluble salt can be prepared by
21
2H2O(l) + 2F2(g) → 4HF(aq) + O2(g). In the reaction above, the substance that is being reduced is
22
Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s). In the reaction above, the oxidizing agent is
23
In an electrochemical cell, polarization is caused by
24
Calculate the volume in cm3 of oxygen evolved at s.t.p. when a current of 5 A is passed through acidified water for 193 s. {F = 96500 C mol−1, molar volume at s.t.p. = 22.4 dm3}
25
In an endothermic reaction, if there is a loss in entropy the reaction will
26
2SO2(g) + O2(g) ⇄ 2SO3(g), ΔH = −395.7 kJ mol−1. In the reaction above, the concentration of SO3(g) can be increased by
27
The minimum amount of energy required for a reaction to take place is
28
In the graph above, the activation energy of the catalyzed reaction is
29
3Fe(s) + 4H2O(g) ⇄ Fe3O4(s) + 4H2(g). The equilibrium constant, K, of the reaction above is represented as
30
Which of the following compounds is a neutral oxide?
31
In the laboratory preparation of ammonia, the flask is placed in a slanting position so as to
32
Which of the gases is employed as an anaesthesia?
33
Sulphur(IV) oxide is a strong reducing agent in the presence of water due to the formation of
34
A metal that forms soluble trioxosulphate(IV) ion is
35
Copper is displaced from the solution of its salts by most metals because it
36
The coloured nature of transition metal ions is associated with their partially filled
37
Aluminium containers are frequently used to transport trioxonitrate(V) acid because aluminium
38
2-methylbutan-2-ol is an example of a
39
The reaction between ammonia and ethyl ethanoate produces
40
The decarboxylation of ethanoic acid will produce carbon(IV) oxide and
41
The compound above is an
42
The compound that will react with sodium hydroxide to form salt and water is
43
Which of the following compounds in solution will turn red litmus paper blue?
44
The dehydration of ammonium salt of alkanoic acids produces a compound with the general formula
45
Which of the following fractions is used as raw material for the cracking process?
46
An organic compound with a pleasant smell is likely to have a general formula
47
A primary amide is generally represented by the formula
48
The IUPAC nomenclature for the compound above is
49
An organic compound contains 60% carbon, 13.3% hydrogen and 26.7% oxygen. Calculate the empirical formula. (C=12, H=1, O=16)
