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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 21:

The solubility curve shows the variation of solute concentration with

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A Volume
B Temperature
C Vapour density
D Pressure

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Question 22:

The air around smelting industries is likely to contain

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A H₂S, CO and N₂
B CO₂, SO₃ and H₂
C H₂, SO₂ and CO₂
D SO₂, N₂ and CO₂

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Question 23:

Kerosine is commonly used to remove the red colour stain of palm oil from cloths because it

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A Helps to spread the oil over a larger surface area
B React with the oil to form an odourless compound
C Makes the oil evaporate easily by dissolving it
D Helps to dilute the oil and reduce its colour

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Question 24:

The gas that is the most dangerous pollutant to human is

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A Sulphur (IV) oxide
B Carbon (IV) oxide
C Nitrogen (II) oxide
D Hydrogen sulphide

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Question 25:

Natural water collected from rivers and ponds contain oxygen, carbon (IV) oxide and

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A Nitrogen
B Hydrogen
C Chlorine
D Sulphur
E Oxide

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