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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 31:

The allotropy of carbon used in the decolourization of sugar is

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A Graphite
B Soot
C Charcoal
D Lampblack

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Question 32:

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

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A Chlorine
B Oxygen
C Ammonia
D Hydrogen

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Question 33:

When steam is passed over red-hot carbon, the substances produced are

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A Hydrogen and trioxocarbonate (IV) acid
B Hydrogen, oxygen and carbon (IV) oxide
C Hydrogen and carbon (II) oxide
D Hydrogen and carbon (IV) oxide

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Question 34:

Sulphur (IV) oxide bleaches by

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A Reduction
B Oxidation
C Hydration
D Adsorption

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Question 35:

Carbon is tetravalent because

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A The electrons in both the 2s and 2p orbitals are equivalent
B The electrons in all the orbitals of carbon are equivalent
C The 2s and 2p atomic orbitals hybridize
D All the atomic orbitals of carbon hybridize

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