Jamb Chemistry 2011 Past Questions and Answers

Question 11:

• JAMB 2011

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

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

Question 12:

• JAMB 2011

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

A. Electrovalent
B. Metallic
C. Covalent
D. Dative

Question 13:

• JAMB 2011

Hardness of water is mainly due to the presence of

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

Question 14:

• JAMB 2011

A suitable solvent for iodine and nephthalene is

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

Question 15:

• JAMB 2011

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

A. Xenon
B. Neon
C. Helium
D. Argon