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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 6:

The oxidation number of manganese in KMnO₄ is?

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A +1
B +3
C +5
D +7
E +2

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Question 7:

Methane is member of the homologous series called?

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A Alkenes
B Alcohols
C Esters
D Alkanes
E Alkynes

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Question 8:

For iron to rust, there should be present?

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A Oxygen
B Moisture
C Carbondioxide
D Oxygen and moisture
E Oxygen, moisture and carbondioxide

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Question 9:

The mass number of an atom is?

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A The number of electrons in the atom
B The number of protons in the nucleus of the atom
C The number of neutrons in the nucleus of the atom
D The sum of numbers of electrons and protons inthe atom
E The sum of numbers of proton and neutrons in the nucleus of the atom

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Question 10:

Sodium and potassium belong to the same group of the Periodic Table. This is because?

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A Both are metals
B Both are soft and lighter than water
C Both form cations by losing electrons
D Both have identical electronic configuration
E Both react with water vigorously

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