2019
With temperature and the amounts of reactants otherwise unchanged, which choice names both of the listed separate changes that speed up carbon(IV) oxide release in this reaction?2HCl + CaCO\(_3\) → CaCl\(_2\) + H\(_2\)O…
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2019 JAMB UTME Chemistry Past Questions
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2019
The part of the total energy of a system that accounts for the useful work done in a system is known as
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2019
When the end alkyl groups of ethyl ethanoate are interchanged, the compound formed is
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2019
An element Z contains 80% of \(^{16} _8\)Z and 20% of \(^{18} _8\)Z. Its relative atomic mass is
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2019
How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons?
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2019
Solution X mixed with AgNO\(_3\) solution gives a white precipitate soluble in aqueous NH\(_3\). Adding solution Y to X gives another white precipitate that dissolves in hot water. Which identified anion in X and cation…
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2019
The reaction \(2H_2 S + SO_2 \to 3S + 2H_2 O\) is
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2019
How many alkoxyalkanes can be obtained from the molecular formula C\(_4\)H\(_{10}\)O?
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2019
The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt under the same condition?[X = 63, Y = 27, 1F = 96,500C]
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2019
If the cost of electricity required to discharge 10g of an ion X\(^{3+}\) is N20.00, how much would it cost to discharge 6g of ion Y\(^{2+}\)?[1 faraday = 96,500C, atomic masses are X = 27, Y = 24]
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2019
Hydrogen diffused through a porous plug
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2019
The emission of two successive beta particles from the nucleus \(^{32} _{15} P\) will produce
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2019
The velocity, V of a gas is related to its mass, M by (k = proportionality constant)
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2019
X is a substance which liberates CO\(_2\) on treatment with concentrated H\(_2\)SO\(_4\). A warm solution of X can decolorize acidified KMnO\(_4\). X is
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2019
At constant temperature and pressure, which of these conditions gives a negative Gibbs free energy change and makes the forward reaction spontaneous?
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2019
200cm\(^3\) of 0.50mol/dm\(^3\) solution of calcium hydrogen trioxocarbonate (IV) is heated. The maximum weight of solid precipitated is
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2019
Which of the following sets of operation will completely separate a mixture of sodium chloride, sand and iodine?
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2019
Methane is prepared in the laboratory by heating a mixture of sodium ethanoate with soda lime. The chemical constituent(s) of soda lime is/are
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2019
In the usual school description, hydrogen bonding is a special type of
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2019
The oxidation state(s) of nitrogen in ammonium nitrite is/are
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