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Chemistry Post UTME Past Questions | Obafemi Awolowo University (OAU)



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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\(_4\)
Comments (2)

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\(^3\)

Comments (4)

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

Comments (1)

Question 4

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

Options

A) methoxyethane

B) methyl propanoate

C) ethyl ethanoate

D) propyl methanoate

Comments (6)

Question 5

Which of these elements has the highest first ionization energy?

Options

A) Rb

B) Li

C) Na

D) K

Comments (1)

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
Comments (2)

Question 7

The type of reaction an alkanoic acid cannot undergo is

Options

A) Oxidation

B) Combustion

C) Decomposition

D) Esterification

Comments (7)

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

Comments (2)

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

Comments (1)

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

Comments (5)