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Chemistry Post UTME Past Questions | Olabisi Onabanjo University (OOU)

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Question 1

Organic Chemistry is the branch of Chemistry that deals with ______ and _______.


A) Hydrogen and Oxygen

B) Carbon and Carbon

C) Carbon and Sulphur

D) Carbon and Hydrogen

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Question 2

The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as


A) Brownian Motion

B) Zig Zag Motion

C) evaporation

D) liquefaction

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Question 3

Which of the following is an acidic salt?



B) Na2SO4


D) Na2S

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Question 4

Given that the molecular mass of iron is 56 and that of oxygen is 16, how many moles of iron (III) oxide will be contained in 1kg of the compound?


A) 12.5 moles

B) 0.625 moles

C) 25 moles

D) 6.25 moles

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Question 5

3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3 standard flask. 25cm3 of this solution required 40.00cm3 of 0.01M HCl for neutralization. What is the percentage by weight of k2CO3 in the mixture? (k = 39, 0 = 16, C = 12)


A) 92

B) 89

C) 72

D) 826

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Question 6

0.499g of CuSO XH20 when heated to constant weight gave a residue of 0.346g. What is the value of X?


A) 2.0

B) 3.0

C) 5.0

D) 4.0

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Question 7

The principal constituents of natural gas is


A) methane

B) ethane

C) propane

D) butane

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Question 8

Which of the following gases can be collected by method of downward delivery?


A) chlorine

B) oxygen

C) ammonia

D) hydrogen

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Question 9

A mixture of sugar and sulphur can be separated by


A) dissolution in water, evaporation and filtration

B) filtration, evaporation and dissolution in water

C) dissolution in water, filtration and evaporation

D) evaporation, dissolution in water and filtration

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Question 10

The percentage of water of crystallization in ZnSO4. 7H2O is


A) 33%

B) 44%

C) 55%

D) 87%

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