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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 16:

An element that can exist in two or more different structural forms which possess the same chemical properties is said to exhibit.

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A Polymerism
B Isotopy
C Isomorphism
D Isomerism
E Allotrophy

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Question 17:

Sulphur

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A Forms two alkaline oxides
B Is spontaneously flammable
C Burns with a blue flame
D Conducts electricity in the molten state
E Is usually stored in the form of sicks in water

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Question 18:

Which of the following statements is NOT true of carbon monoxide?

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A CO is poisonous
B CO is readily oxidized at room temperature by air to form CO₂
C CO may be prepared by reducing CO₂ mixed with coke heated to about 1000^oC
D CO may be prepared by heating charcoal with a limited amount of O₂
E CO is a good reducing agent

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Question 19:

From the reactions : ZnO + Na₂O \(\to\) NaZnO and ZnO + CO₂ \(\to\) ZnCO₃ it may be concluded that zinc oxide is

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A Neutral
B Basic
C Acidic
D Amphoteric
E A mixture

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Question 20:

An example of a neutral oxide is

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A AL₂O₃
B NO₂
C CO₂
D CO
E SO₂

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