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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 11:

The importance of sodium aluminate (III) in the treatment of water is to

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A Cause coagulation
B Neutralize acidity
C Prevent goitre and tooth decay
D Kill germs

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Question 12:

What type of bond exits between an element X with atomic number 12 and Y with atomic number 17?

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A Electrovalent
B Metallic
C Covalent
D Dative

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Question 13:

Hardness of water is mainly due to the presence of

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A Calcium hydroxide or magnesium hydroxide
B Calcium trioxocarbonate (IV) or calcium tetraoxosulphate (VI)
C Sodium hydroxide or magnesium hydroxide
D Calcium chloride or sodium chloride salts

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Question 14:

A suitable solvent for iodine and nephthalene is

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A Carbon (IV) sulphide
B Ethanol
C Water
D Benzene

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Question 15:

Which of the following noble gases is commonly found in the atmosphere?

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A Xenon
B Neon
C Helium
D Argon

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