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JAMB: CHEM – Alkaline Earth Metals
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JAMB: CHEM – Alkanals and Alkanones
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JAMB: CHEM – Alkanes
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JAMB: CHEM – Alkanoic Acids
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Question 1 of 50
Pollution of water by crude oil can lead to
Question 2 of 50
When a few drops of barium chloride is added to an unknown sample acidicified with hydrochloric acid, a white precipitate insoluble in excess of acid was obtained. The likely anion in the sample is
Question 3 of 50
Oxygen in air can be removed using
Question 4 of 50
Calculate the pH of a solution of 0.0001 mol/dm3 hydrochloric acid.
Question 5 of 50
Which of the following drying agents is not suitable for drying hydrogen sulphide?
Question 6 of 50
Diamond is used in making jewellery due to its
Question 7 of 50
The presence of impurities will make the melting point
Question 8 of 50
The discovery that protons and neutrons are concentrated at the nucleus of an atom was postulated by
Question 9 of 50
Which of the following is a hygroscopic substance?
Question 10 of 50
In a chemical reaction, when the energy of the colliding reaction particles is less than the activation energy, the reaction will
Question 11 of 50
The monomer of natural rubber is
Question 12 of 50
The oxidation number of Boron in NaBH4 is
Question 13 of 50
PCl5(l) \(\rightleftharpoons \) PCl3(l) + Cl2(g) ∆H = +ve
In the reaction above, the forward reaction is favoured by
Question 14 of 50
Which of the following halogens is the most reactive?
Question 15 of 50
A gas that forms a black precipitate with lead(II) ethanoate is
Question 16 of 50
The common ore of iron is
Question 17 of 50
A property common to the above structures is that they have the same
Question 18 of 50
The type of salt that ionizes to produce three different types of ions in solution is
Question 19 of 50
H2 S(g) + Br2(g) \(\rightarrow \) 2HBr(g) + S(s)
In the above reaction, the oxidation agent is
Question 20 of 50
The process whereby a gaseous body loses some of its kinetic energy to a colder body is referred to as
Question 21 of 50
Which of the quantum numbers determine the energy sub-level in an orbital?
Question 22 of 50
Fehling’s solution can be used to distinguish between
Question 23 of 50
What is the molecular formular for a compound with empirical formula CH2 and vapour density 42?
Question 24 of 50
The separation technique that is based on the principle of solubility of solid two miscible liquids is
Question 25 of 50
Hydrogen bond can be found in
Question 26 of 50
24 g of magnesium reacts with dilute hydrochloric acid. Calculate the volume of hydrogen gas evolved at s.t.p.
[Mg = 24, molar volume of gas at s.t.p = 22.4 dm3 ]
Question 27 of 50
Aluminium is used as electrical cable due to its
Question 28 of 50
A chemical reaction with entropy change of 20 JK-1 and free energy change +55000 J occurred at –23°C. Calculate the enthalpy change.
Question 29 of 50
The enzyme invertase converts sucrose into
Question 30 of 50
The number of lone pair of electrons in water molecules is
Question 31 of 50
In the illustration below, x and y respectively represent ______
n monosaccharide \(\normalsize \overset{x}{\underset{y}{\rightleftharpoons} }\) polysaccharide – n water.
Question 32 of 50
The main product of the reaction between phosphorus(V) chloride and ethanol is
Question 33 of 50
The bond-breaking energies in an endothermic reaction is usually
Question 34 of 50
In the reaction below, x and y respectively are:
\(\scriptsize\;^{234}_{90}Th \rightarrow\; ^{x}_{y}Pa\;+\;\beta \)
Question 35 of 50
The compound of calcium used to make refractory furnace lining is
Question 36 of 50
The mass of copper deposited when a current of 2.0 A is passed through a solution of copper salt for 60 minutes.
[Cu = 64, F = 96500 C mol-1 ]
Question 37 of 50
Which of the following compounds will liberate carbon(IV) oxide on reaction with sodium tetraoxocarbonate(IV)?
Question 38 of 50
Kerosene is a petroleum fraction that distils over in the temperature range of
Question 39 of 50
The preference in the usage of asbestos support to platinum block as a catalyst can be attributed to its
Question 40 of 50
In the reduction of ethyl ethanoate with LiAlH4 , the product obtained is
Question 41 of 50
A sample of salt was heated on a Bunsen flame. If the colour of the flame turned bluish-green, the metal present is likely to be
Question 42 of 50
A salt that loses moisture on exposure to the atmosphere is said to be
Question 43 of 50
In the graph above, at what temperature is the solubility of KHCO3 and NaCl the same?
Question 44 of 50
1050 cm3 of helium gas was produced a – 33°C and 700 mmHg. What volume would the gas occupy at 23°C and 750 mm Hg?
Question 45 of 50
In the reaction below X is a
\(\scriptsize\;^{14}_{7}N+X\;\rightarrow \;^{17}_{8}O\;+\;^{1}_{1}H\)
Question 46 of 50
The colour of phenolphithalein in an alkaline medium is
Question 47 of 50
Calculate the molecular formular of a compound whose empirical formula is CH2 O and relative molecular mass is 120.
[C = 12, O = 6, H = 1].
Question 48 of 50
MnO2(s) + 4HCl(aq) \(\rightarrow\)MnCl2(aq) + Cl2(g) + 2H2 O(l)
In the reaction above, MnO2 acts as
Question 49 of 50
Calculate the mass of magnesium that would be deposited by 8 Faraday of electricity. [Mg = 24].
Question 50 of 50
Which of the following hydrocarbons will not undergo polymerization?
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