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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 1:

Which of the following substances is a mixture?

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A Sulphur powder
B Bronze
C Distilled water
D Ethanol

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Question 2:

Which of the following substances is a mixture?

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A Sulphur powder
B Bronze
C Distilled water
D Ethanol

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Question 3:

A balanced chemical equation obeys the law of?

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A Conservation of mass
B Difinite proportions
C Multiple proportions
D Conservation of energy

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Question 4:

How many moles of oxygen molecules would be produced from the decomposition of 2.50 moles of potassium trioxochlorate (V)?

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A 2.50
B 3.50
C 3.75
D 7.50

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Question 5:

For iodine crystals to sublime on heating, the molecules must acquire energy that is?

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A Less than the forces odf attraction in the solid
B Equal to the forces of attraction in th solid
C Necessary to melt the solid
D Greater than the forces of attraction in both the solid and the liquid phases

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