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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 16:

What is the concentration of a solution containing 2g of NaOH in 100cm³ of solution?
[Na=23, O=16, H=1]

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A 0.05 moldm^-3
B 0.30 moldm^-3
C 0.50 moldm^-3
D 0.40 moldm^-3

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Question 17:

The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is

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A Phosphorus-32
B Cobalt-60
C Carbon-14
D Iodine-131

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Question 18:

The compound produced when sodium peroxide is heated with excess sodium is

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A Na₂CO₃
B Na₂O
C NaNO₂
D NaOH

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Question 19:

The pollutant that contributes to the depletion of the ozone layer is

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A CFCs
B NO₂
C SO₂
D CO

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Question 20:

Which of the following properties is not peculiar to matter?

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A Kinetic energy of particles increases from solid to gas
B Random motion of particles increases from gas to solid
C Orderliness of particles increases from gas to liquid
D Random motion of particles increases from liquid to gas

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