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Chemistry Post UTME Past Questions | OAU Post UTME

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Question 1

When CuSO\(_4\) solution is treated with ammonia solution drop by drop till it is added in excess, a precipitate is first formed which then dissolves in excess to give a deep blue solution. The deep blue solution is

Options

A)
Cu(OH)\(_2\)
B)
(Cu(NH\(_3\))\(_4\))(OH)\(_2\)
C)
CuSO\(_4\)
D)
(Cu(NH\(_3\))\(_2\))SO\(_4\)

Related Lesson: Dilute and Concentrated Solutions | Acid-Base and Redox Reactions

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Question 2

If 7.0 g of ethane at s.t.p occupy 5.6 dm\(^3\), what volume will 7.5 g of ethane at the same condition occupy? (C = 12; H =1; GMV at s.t.p = 22.4 dm\(^3\))

Options

A)
6.0 dm\(^3\)
B)
5.6 dm\(^3\)
C)
5.2 dm\(^3\)
D)
9.4 dm\(^3\)

Related Lesson: Reactions and Gases | Quantitative Aspects of Chemical Change

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Question 3

Which of the alcohol below is likely to be oxidiezed to give the acid below:

Options

A)
Butan-1-ol
B)
2-methylpropan-2-ol
C)
2-Methylpropan-1-ol
D)
Propane-2-ol

Related Lesson: Naming Alcohols | Organic Molecules

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Question 4

The name of CH\(_3\)-OCOC\(_2\)H\(_5\) is

Options

A)
methoxyethane
B)
methyl propanoate
C)
ethyl ethanoate
D)
propyl methanoate

Related Lesson: Hydrogen Bonding | Liquids and Solids

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Question 5

Which of these elements has the highest first ionization energy?

Options

A)
Rb
B)
Li
C)
Na
D)
K

Related Lesson: Variation in Ionization Energies | Electronic Structure of Atoms

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Question 6

Which of the following is responsible for the conduction of electricity in a gas enclosed in a glass tube containing two electrodes at a reduced pressure and to which a high voltage is applied?

Options

A)
Cations and anions
B)
Cations
C)
Electrons
D)
Cations and electrons

Related Lesson: Cathode Rays | Atoms, Molecules and Ions

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Question 7

The type of reaction an alkanoic acid cannot undergo is

Options

A)
Oxidation
B)
Combustion
C)
Decomposition
D)
Esterification

Related Lesson: Carboxylic Acids and Esters | Organic Chemistry

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Question 8

What is the pH of 2.5 \(\times\) 10\(^{-2}\) mol dm\(^{-3}\) barium hydroxide solution?

Options

A)
11.5
B)
11.6
C)
11.7
D)
11.8

Related Lesson: pH and pOH | Acid-Base Equilibria

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Question 9

The complete oxidation of proan -1-ol yields

Options

A)
CH\(_3\)CH\(_2\)CHO
B)
CH\(_3\)COCH\(_3\)
C)
CH\(_3\)COOH\(_3\)
D)
CH\(_3\)CH\(_2\)COOH

Related Lesson: Hydrogen Bonding | Liquids and Solids

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Question 10

Which of the following will change the equilibrium constant of the reaction CO\(_{(g)}\) + H\(_2\)O \(\iff\) CO\(_{2(g)}\) + H\(_{2(g)}\) ?

Options

A)
Increase of temperature
B)
Increase of concentration of CO
C)
Removal of CO\(_2\) from the mixture
D)
Decrease of pressure

Related Lesson: Summarizing Equilibrium Constants | Fundamental Equilibrium Concepts

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